Cummins/Onan DFLC — Specs, Engine, Parts & Maintenance

Service parts for the DFLC

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

140-2098Air filtersee priceAmazon

Fuel system

1 required

FS1006Fuel filter$29.99eBay

Oil system

1 required

LF3325Oil filter$37.15NAPA

Belts

1 required

98-5347Beltsee priceAmazon

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

Fuel	Diesel
Frequency	60.0 Hz
Standby power	1250 kW
Standby kVA	1563
Prime power	1100 kW
Emissions	not specified
Controller	Detector, PowerCommand, PowerCommand 2100 (PCC2100), PowerCommand 3100 (PCC), PowerCommand PCC2100
Oil capacity	169.0 L
Alternator	Not specified
Voltage options	220/380 V, 240/415 V, 254/440 V, 277/480 V, 347/600 V, 2400/4160 V
Phase	Three Phase
Rated current	2373 A
Power factor	not specified
Circuit breaker	not specified A
Battery group	8D
Battery cranking	1400 CCA
Battery voltage	24 V
Battery quantity	4
Coolant capacity	386 L
Max ambient	40 °C
Dimensions (L×W×H)	5652×2277×2441 mm
Dry weight	10864 kg
Tank runtime	not specified hr

Engine

Cummins/Onan KTA50

Oil capacity	169.0 L
Coolant capacity	348.0 L
Displacement	50.0 L
Aspiration	turbocharged and after-cooled
Rated speed	1800 rpm

Filters for the Cummins/Onan KTA50

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

System	Filter	Description	Cross-references
Oil filter	P551670	Lube Filter, Spin-On Full Flow	CUMMINS 298670, CUMMINS 299670, NAPA 1970, CARBOCOL 0026	FridayParts $26.68
Oil filter	P550777	Lube Filter, Spin-On Bypass	CUMMINS 3021658, CUMMINS 33004232, NAPA 1749, BALDWIN B7577	FridayParts $43.56
Fuel filter	P550105	Fuel Filter, Spin-On Primary	CUMMINS 154700, CUMMINS 154710, NAPA 3109, NAPA 3405	buy
Fuel / water separator	P552216	Fuel Filter, Water Separator Spin-On Twist&Drain	CUMMINS 3309437, CUMMINS 3313304, NAPA 3613, BALDWIN BF1216	buy

Same engine, other brands

1 brand

The Cummins/Onan KTA50 in this set also powers 2 generator sets sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.

Brand	Models
AKSA	AC1435, AC1675

Maintenance & consumables

for the Cummins/Onan KTA50

Item	Spec	Capacity	Part #	Interval
Air filter	Air Cleaner - Throwaway Type		140-2098		Amazon eBay
Fuel filter	Cummins Filtration FS1006		FS1006		Amazon eBay $29.99 NAPA $90.16
Oil filter			LF3325		Amazon eBay $229.00 NAPA $37.15 KuduParts $74.00 FridayParts $75.99
Battery		×4	—	460 hr
Belt	Decal - Caution Fan Drive & Lube Components Group Belt.		98-5347		Amazon eBay
Coolant		440.0 l	—	3600 hr
Oil		177.0 l	—	3600 hr
Spark plug			—

Service intervals

Item	Action	Hours	Months	Notes
crankcase oil	Change	50 hr		First service — Drain and replace the crankcase oil after the first 50 hours of operation on new generator sets (break-in)
Check Electrolyte Level (batteries)	Check	200 hr		At least every 200 hours of operation
Change Crankcase Oil and Filter	Change	250 hr	12 mo	If used for standby applications, change oil every 12 months or 250 hours, whichever comes first (footnote X6)
Crankcase oil and filter	Change	250 hr	12 mo	Standby applications: change oil every 12 months or 250 hours, whichever comes first
Grease generator bearing (P7)	Lubricate	4000 hr		Table 5-2 explicit interval; grease type Kluber ASONIC GHY72, 75 grams
Generator bearing (P7 only)	Lubricate	4500 hr		Re-lubrication period 4000-4500 hours; 75 grams Kluber ASONIC GHY72
Exercise generator set	Test		1 mo	At least once a month for a minimum of 30 minutes, under not less than 30 percent of nameplate rating
Rupture basin leak detect switch	Test		12 mo	Some areas may require weekly inspections by safety code.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Service specifications

Type	Item	Value	Unit	Condition
Clearance	Air cleaner nozzle distance from element	at least 1 (25)	inch (mm)
Clearance	Angular alignment maximum T.I.R.	0.001	inch per inch of radius (center of shaft to indicator axis)	measuring deflection to bolt heads
Clearance	Float switch assembly float lift clearance below C-clip stop	1/8	inch (3 mm)	use a feeler gauge
Clearance	Generator-to-engine angular alignment (T.I.R.)	.001 in. per inch of radius (center of shaft to indicator axis), maximum	in	750 kW gensets and larger
Clearance	MPU sensor to gear tooth adjustment	back out one quarter turn	turn	after contacting gear tooth
Gap	Float switch lift to test open	1/8	inch	below C-clip stop
Gap	MPU sensor to flywheel ring gear tooth	back it out one quarter turn	turn	sensor threaded in until it just touches gear tooth
Other	AVR Droop setting	5	% at full load, 0 PF
Other	AVR voltage regulation (load regulation)	approximately ±0.5	% RMS
Other	Air cleaner element cleaning air pressure	30 (207)	psi (kPa)	low pressure compressed air through element from clean side
Other	Angular alignment maximum T.I.R.	.001 inches per inch of radius	in/in	center of shaft to indicator axis
Other	B+ output fuse	10	amp	F1, Base board, 12/24 volt
Other	Battery charging current	45	Amps
Other	Battery electrolyte specific gravity	1.260		at 80°F
Other	Battery specific gravity (high ambient, above 95F/35C)	1.225		recommended to reduce electrolyte loss
Other	Battery specific gravity (recharge threshold)	below 1.260
Other	Battery specific gravity - charge threshold (below this, charge battery)	1.215
Other	Battery specific gravity - fully charged (corrected)	1.260
Other	Battery specific gravity, fully charged	approximately 1.260	specific gravity	at 80 F (27 C)
Other	Continuous crank without cycle cranking option (PCC)	up to 75	seconds
Other	Customer Output relay contact rating	2	amps at 30 VDC	TB1 customer outputs 1-4, normally open
Other	Fuel lift height limit	6	feet	(1.8 meters) between fuel lift pump and bottom of dip tube
Other	GOV GAIN default value for paralleling applications	70	%
Other	Ground Fault Relay current setting	5 to 1200	amperes	optional GFR
Other	Ground Fault Relay time delay setting	0 to 1	second	optional GFR
Other	Low oil pressure / high engine temperature fault time delay after starter disconnect	about 10	seconds
Other	Maximum cranking voltage drop	2	volts	difference between battery and starter terminals while cranking
Other	Optional control relay (K11/K12/K13) contact rating	10	amps at 600 VAC
Other	Output frequency adjustment range	+/- 5	%	set running, not in idle mode
Other	Over/Under Frequency Sensor Module - Over Hz Set, 50 Hz nominal	55	Hz	reset 53 Hz
Other	Over/Under Frequency Sensor Module - Over Hz Set, 60 Hz nominal	65	Hz	reset 63 Hz
Other	Over/Under Frequency Sensor Module - Under Hz Set, 50 Hz nominal	45	Hz	reset 47 Hz
Other	Over/Under Frequency Sensor Module - Under Hz Set, 60 Hz nominal	55	Hz	reset 57 Hz
Other	Over/Under Voltage Sensor Module time delay	typically 25 percent, approximately 2.5	seconds
Other	Overcrank cranking limit	75	seconds	three 15-second cranking cycles with two 15-second rest periods
Other	Overcrank cranking limit (standard control)	75	seconds
Other	Overcrank cycle cranking (Detector, standard)	three 15-second cranking cycles with two 15-second rest periods	seconds
Other	Overcrank cycle cranking (PCC)	3, 4, or 5 cycles; crank and rest times 7 to 20	seconds
Other	Overcrank cycling option	three 15-second cranking cycles with two 15-second rest periods		12-lamp control
Other	Overcrank limit (Detector, optional)	75	seconds
Other	REG VHZ (underfrequency roll-off) adjustable range	1 through 50; normal range 7 through 21
Other	Start delay (PCC, remote start in Auto)	0 to 300	seconds
Other	Start delay adjustment range	0 to 300	seconds
Other	Stop delay (PCC, remote stop in Auto)	0 to 600	seconds
Other	Stop delay adjustment range	0 to 600	seconds
Other	Switched B+ output fuse	5	amp	F2, Base board, 12/24 volt
Other	Under Frequency Roll Off (UFRO) knee point, 50 Hz units	48 to 49	Hz
Other	Under Frequency Roll Off (UFRO) knee point, 60 Hz units	58 to 59	Hz
Other	Under-frequency roll-off threshold (UFRO)	typically 59 Hz for 60 Hz applications and 49 Hz for 50 Hz applications	Hz	AVR UFRO pot preset
Pressure	Air cleaner element cleaning, compressed air pressure	30	psi (207 kPa)	blow through element from clean side; nozzle at least 1 inch (25 mm) away
Pressure	Detector oil pressure normal range after reset	25 to 40	psi (172 to 275 kPa)
Pressure	Engine oil pressure - K19 normal	50-70	psi (345-482 kPa)	run mode
Pressure	Engine oil pressure - K38 normal	45-65	psi (310-448 kPa)	run mode
Pressure	Engine oil pressure - K50 normal	50-70	psi (345-482 kPa)	run mode
Pressure	Engine oil pressure - L10/M11 normal	30-50	psi (207-345 kPa)	run mode
Pressure	Engine oil pressure - NTA 855 normal	35-50	psi (241-345 kPa)	run mode
Pressure	Engine oil pressure - V28 normal	50-90	psi (345-620 kPa)	run mode
Pressure	Engine oil pressure shutdown limit - L10/M11	20	psi (138 kPa)	run mode value
Pressure	Engine oil pressure shutdown limit - L10/M11	8	psi (55 kPa)	idle mode value
Pressure	Engine oil pressure warning limit - L10/M11	12	psi (83 kPa)	idle mode value

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Recommended fluids

Fluid	Grade	Standard	Ambient	Capacity	Notes
Coolant	soft water / E.G. / DCA mixture				Cooling system to be filled with soft water/E.G./DCA mixture (on-site review checklist).
Coolant	water/antifreeze mixture (permanent type antifreeze)	Clean, low mineral content water free of chloride, sulphate or acid			Mix water and antifreeze per supplier recommendation for lowest expected ambient temperature; do not use antifreeze containing anti-leak additives
Engine oil	SAE 5W synthetic	API class CC/CD; sulphated ash content not exceeding 1.85 percent; pour point 9°F (5°C) below lowest expected temperature; viscosity 10,000 mPa.s maximum at -31°F (-35°C) and 4.1 mm2/s minimum at 212°F (100°C)	above -25°C		Recommended when ambient temperature is consistently below -13°F (-25°C) and there is no provision to keep the engine warm; do not use petroleum base 5W grade oil
Engine oil	multigrade / multiviscosity	API Class CC/CD; maximum sulphated ash content 1.85 percent	-25°C to 35°C		Specifications section lists ambient ranges -13°F to 95°F (-25°C to 35°C), 14°F (-10°C) and above, and 32°F (0°C) and above; single grade oil not recommended; do not mix oils of another classification or brand
Fuel	ASTM No. 2 diesel	ASTM			Alternate diesel fuels per Cummins engine O&M Manual specifications
Fuel	Diesel				Day tank fuel transfer pump maintains reservoir of diesel fuel in the day tank.
Fuel	No. 2 diesel				Engine will also operate on No. 1 fuel or other similar fuels if they meet certain specifications
Grease	Kluber, type ASONIC GHY72			75.0 grams	P7 generator bearing re-lubrication grease fill quantity; fill period 4000-4500 hours. Must not be mixed with any other type.
Grease	Lithium based grease	Mobilux No. 2 or Shell Alvania R3		2.74 oz (81 ml)	Generator end bearing. Temperature range -22F to +248F (-30C to +120C). Grease should be equally divided between the bearing, bearing cap cavity, and bearing cartridge cavity.
Grease	Lithium based		-30°C to 120°C	81.0 ml	Mobilux No. 2 or Shell Alvania R3; generator end bearing; temperature range -22 F to +248 F (-30 C to +120 C); grease divided between bearing, bearing cap cavity and cartridge cavity.
Grease	Lithium based grease, Mobilux No. 2 or Shell Alvania R3		-30°C to 120°C	2.74 oz (81 ml)	End bearing lubricant; grease equally divided between bearing, bearing cap cavity and bearing cartridge cavity.
Other	Donaldsons D1400 solvent (or equivalent)				Air cleaner element cleaning: soak filter at least 15 minutes in water and Donaldsons D1400 solvent.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Fault codes

Code	Name	Meaning	Severity	Action
101	IDLE MODE	Indicates that the engine is operating in idle mode. Grounding the engine idle input causes generator build-up to be inhibited and the engine to be governed at 800 RPM.	Warning	Remove ground from engine idle input to return to normal speed and voltage.
102	EMERGENCY STOP	Local or remote Emergency Stop activated	Shutdown	Turn the switch clockwise and allow it to pop out (local only); move the Run/Off/Auto switch to Off; press the Reset switch; select Run or Auto as required. Can be reset only at the PCC front panel.
1122	Rated/Idle Trans		Info
1123	Shutdown After Battle Short	Shutdown fault occurred while Battle Short was enabled and then disabled.	Shutdown	Review Fault History and perform corrective action.
1124	Delayed Shutdown	Shutdown fault became active while Delayed Shutdown feature was enabled.	Warning	Review Fault History and perform corrective action.
1131	Battle Sh Active	Control is in Battle Short mode.	Warning	Bypasses several critical fault shutdowns for emergency operation.
121	Speed Signal Lost	Mag pickup speed indication is not being sensed.	Shutdown	Restart and check RPM on the digital display.
1311	Customer Input #1			Optional customer selection (e.g. Low Fuel Day Tank, Water In Fuel, Ground Fault). Programmable via service tool: enable/disable, status/warning/shutdown, active open/closed, display name.
1311, 1312, 1317, 1318	CUSTOMER INPUT #1 - #4	Optional customer-selected fault input is active.	Warning	Check external wiring and active input (closed/open) selection.
1312	Customer Input #2			See code 1311.
1313-1316	Network Fault 1 thru 4
1317	Customer Input #3			See code 1311.
1318	Customer Input #4			See code 1311.
1334	Crit Scaler Out Of Range	Incorrect feature or calibration entered into control.	Shutdown	Reload correct calibration.
1335	Noncrit Scaler Out Of Range	Incorrect feature or calibration entered into control.	Warning	Reload correct calibration.
1337	No Message		Info
135	Oil Pressure Sensor H	Engine oil pressure sender signal is shorted high.	Warning	Check sender/connectors/wires.
141	Oil Pressure Sensor L	Engine oil pressure sender signal is shorted low.	Warning	Check sender/connectors/wires.
1416	Fail To Shutdown	Genset continues to run after shutdown command.	Warning	Check Battle Short feature enabled condition.
1417	Powr Down Error	Controller cannot power down.	Warning	Controller cannot power down; possible drain on battery. Contact an authorized service center.
143	Pre-Low Oil Pres	Engine oil pressure has dropped to an unacceptable level.	Warning	If generator is powering critical loads and cannot be shut down, wait until next shutdown period and then follow code 415 procedure.
1433	Emergency Stop	Local Emergency Stop.	Shutdown	Pull button out; move switch to O; press Fault Acknowledge/Reset; select Manual or Auto.
1434	Remote E-Stop	Remote Emergency Stop.	Shutdown	See code 1433 to reset.
1435	Low Coolant Temp	Warning LED illuminates when engine jacket water coolant temperature falls below 70°F (21°C); per NFPA 110 requirement, indicates engine may not accept load within 10 seconds	Warning	Set is not operating; occurs when coolant temperature is 70°F (21°C) or lower. Check coolant heater power/fuse/cord, check coolant level and leaks.
1438	Fail To Crank	Engine failed to crank after PCC received a start signal.	Shutdown	Possible fault with control, speed sensing, or starting system. See code 441 for corrective action.
144	Coolant Sensor High	Engine coolant temperature signal is shorted high.	Warning	Check sender/connectors/wires.
1442	Weak Battery	Battery voltage at or below weak battery warning trip point during cranking.	Warning	See code 441 for corrective action.
1443	Battery Failed	Dead battery - engine will not start.	Shutdown	See code 441 for corrective action.
1444	KW Overload	Generator output power exceeded 105% of genset rating.	Warning	Check load and load lead connections; check CTs.
1445	Short Circuit	Generator output current has exceeded 175% of rated.	Shutdown	Check load and load lead connections.
1446	High AC Voltage	One or more phase voltages exceeded 130% of nominal.	Shutdown	Check fault simulation, load removal, threshold settings, Base board/generator.
1447	Low AC Voltage	Phase voltages dropped below 85% of nominal for 10 seconds.	Shutdown	Check overload, output terminal connections, PMG/field wiring, rectifier diodes.
1448	Under Frequency	Engine speed dropped below 90% of nominal for 10 seconds.	Shutdown	Check fuel supply, intake air supply and load.
1449	Over Frequency	Frequency is 10% above base frequency for 20 seconds.	Warning	Check fuel or air delivery; check connections.
145	Coolant Sensor Low	Engine coolant temperature signal is shorted low.	Warning	Check sender/connectors/wires.
1452	Gen CB Not Close	Genset circuit breaker (S2) failed to close when PTC is enabled.	Warning	Refer to Section 5 troubleshooting charts.
1453	Gen CB Not Open	Genset circuit breaker (S2) failed to open when PTC is enabled.	Warning	Refer to Section 5 troubleshooting charts.
1459	Reverse Power	Improper CT phasing.	Shutdown	Check wiring to voltage sense circuit; refer to CT Installation in Section 6.
146	Pre-High Coolant Temp	Engine has begun to overheat.	Warning	Reduce load; check air inlets/outlets; follow code 151 if engine can be stopped.
1461	Loss Of Field	Loss of field (electric) due to reverse kVAR.	Shutdown	Check excitation circuit.
1466	Modem Failure	Control cannot communicate with the modem.	Warning	Check for open, short to ground and loose connections to the modem.
1468	Network Error	Momentary loss of communication from the LonWorks Network.	Warning	Refer to LonWorks Network publications.
1469	Speed/Hz Match	Measured speed and measured AC output frequency do not agree.	Shutdown	Check calibration file.
1471	Over Current	Generator output current exceeded 110% of rated for 60 seconds.	Warning	Check load and load lead connections.
1472	Over Current	Output current exceeded 110% of rated and time/current calculation initiated shutdown.	Shutdown	Check load and load lead connections.
151	High Coolant Temp	Engine has overheated above the shutdown trip point.	Shutdown	Allow engine to cool completely. Check coolant level and replenish if low, look for leaks and repair. Check for obstructions to cooling airflow. Check fan belt. Check blower fan/circulation pumps on remote radiator installations. Reset control and restart.
197	Low Coolant Level	Engine coolant level has fallen below the warning trip point.	Warning	Optional. If generator is powering critical loads and cannot be shut down, wait until next shutdown period, then follow code 235 procedure. If engine can be stopped, follow code 235 procedure.
200	LOW OIL PRESSURE	Indicates engine oil pressure has dropped to an unacceptable level.	Warning	If generator is powering critical loads and cannot be shut down, wait until next shutdown period and then follow 201-SHUTDOWN procedure. Access the Oil Pressure menu prior to clearing the fault.
201	LOW OIL PRESSURE	Indicates engine oil pressure has dropped below the shutdown trip point.	Shutdown	Check oil level, replenish if low, reset control and restart; contact authorized service center.
204	OIL PRES SENDER	Indicates that the control has sensed that the engine oil pressure sender is out of its working range.	Warning	Check that the engine oil pressure sender is properly connected.
210	LOW COOLANT TEMP	Warning occurs when engine coolant temperature is 70°F (21°C) or lower.	Warning	Indicates engine coolant heater is not operating or is not circulating coolant. Check coolant heater power supply, low coolant level, and heater element current draw.
211	HIGH COOLANT TEMP	Indicates the engine coolant temperature is getting close to the recommended maximum temperature limit: 215° F (102° C) − standby or 207° F (97° C) − primary.	Warning	Review 212 correction list; increase in load or higher ambient may cause shutdown.
212	Oil Temp Sensor H	Indicates engine has overheated (coolant temperature has risen above the shutdown trip point: 215 F (102 C) - standby or 207 F (97 C) - primary).	Warning	Cool engine; check coolant level, airflow obstructions and fan belt; reset and restart.
213	Oil Temp Sensor L	Resistance of the coolant temperature sender is out of range.	Warning	Contact authorized service center.
214	LOW COOLANT LVL	Indicates engine coolant level has fallen below the trip point.	Warning	Cool engine; check coolant level and leaks; reset control and restart.
215	LOW COOLANT LVL	Indicates engine coolant level has fallen below the trip point.	Shutdown	Cool engine; check coolant level and leaks; reset control and restart. Shutdown will not occur in Idle mode.
220	MAG PICKUP	Mag pickup speed indication not sensed or does not match output frequency	Shutdown	Restart and check RPM; check PCC model setting; inspect and test MPU.
221	FAIL TO CRANK	Possible fault with control or starting system.	Shutdown	Clean and tighten battery cables; recharge or replace battery; contact service center.
222	OVERCRANK	Possible fuel system problem.	Shutdown	Check fuel tank, leaks, plugged lines, fuel filter and air filter; reset control and restart.
223	OVERSPEED	Indicates engine has exceeded normal operating speed. (115% ±1% of nominal).	Shutdown	Contact authorized service center.
224	FAIL TO SYNCHRONIZE	Generator set has not synchronized to the system bus within the allowable time frame.	Warning	Check governor system stability; adjust governing and synchronizer parameters; check fuel system.
226	FAIL TO CLOSE	Paralleling breaker has been given a signal to close, but has not closed properly.	Shutdown	Verify breaker charging mechanism; check close signal; verify auxiliary contact signals.
230	LOW DC VOLTAGE	Indicates battery voltage is below 10 VDC.	Warning	Recharge or replace the battery; check the battery charger fuse. Clean and tighten battery cable connections. Check engine DC alternator; replace if normal charging voltage is not obtained. Check float level if applicable.
231	HIGH DC VOLTAGE	Indicates battery voltage exceeds 32 VDC.	Warning	Lower battery charger float level if applicable; check engine DC alternator.
232	WEAK BATTERY	Indicates battery voltage drops below 60% of nominal for two seconds, during starting.	Warning	See warning message 230 LOW DC VOLTAGE.
2323-2326	Network Fault 5 thru 8
2327	PTC Fault	PTC module or communication link is not working properly.	Warning	Check PTC module power, ground shield, cycle control power.
2329	Low S1 Frequency	Low utility (S1) frequency.	Warning	Check S1 AC inputs and wiring to PTC at TB5; check sensor set points.
2331	Low S1 Voltage	Low utility (S1) voltage.	Warning	Check S1 AC inputs and wiring to PTC at TB5; check pickup/dropout set points.
2335	Excitation Fault	Loss of all three voltage sense leads or failure in excitation circuit.	Shutdown	Check field wiring (X1 and X2) for shorts or opens.
2336	Memory Error	Control memory error; data corruption of critical operating parameters.	Shutdown	Try reloading calibration file.
2337	Pwr Tran Disabled	PTC module available but PTC feature not enabled.	Warning	Enable PTC feature with InPower; cycle control power.
2338	Pwr Tran Failure	Control could not communicate with the PTC module.	Warning	Check PTC module power and cable ground shield; cycle control power.
2339	Pwr Down Enabled	Power Down (sleep) enabled but PTC module or network board is active.	Warning	None required.
234	Overspeed	Engine has exceeded normal operating speed.	Shutdown	Check for large block load removal, flammable vapors or leaking turbocharger seals.
2341	High Control Temp	Control temperature above 158 F (70 C) for longer than set time.	Warning	Check genset room air flow.
2342	Too Long In Idle (10 min.)	Genset has been in Idle mode too long.	Warning	Exit idle mode.
235	Low Coolant Level	Engine coolant level has fallen below the shutdown trip point.	Shutdown	Optional. Allow engine to cool completely. Check coolant level and replenish if low, look for leaks and repair. Reset control and restart.
2358	High S1 Voltage	Utility (S1) voltage increased above the over-voltage threshold.	Warning	Measure S1 AC inputs at PTC module; check sensor set points.
2396	S1 CB Not Close	Utility contact (S1) failed to close with PTC enabled.	Warning	Refer to Section 5 troubleshooting charts.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Aligning Generator with Engine (Angular Alignment) adjustment

⚠ Accidental starting of the generator set during this procedure presents the hazard of severe personal injury or death.

Tools: Dial indicator, Shims

Disconnect the negative (-) battery cable(s) before beginning.
Fasten a dial indicator to the generator shaft or cooling fan with the sensing point on the capscrew head or flat surface of the drive disc at the bolt circle diameter.
Bar the engine over in a clockwise rotation as viewed from engine flywheel; do not allow it to roll back on compression.
Determine the total indicator reading (T.I.R.) as the sum of the maximum positive and negative dial indicator readings over one revolution.
Measure the distance from the center of the generator shaft to the indicator measuring point.
Measure the distance from the generator side of the flex discs to the center of the generator mounting bolt.
Compare the distances; multiply this ratio times one half the T.I.R. to approximate the amount of shims to remove or add.

Angular Alignment Procedure adjustment

⚠ Accidental starting of the generator set during this procedure presents the hazard of severe personal injury or death. Make sure to disconnect the negative (-) battery cable(s) before beginning.

Tools: Dial indicator, Wooden shims

Disconnect the negative (-) battery cable(s) before beginning.
Fasten a dial indicator to the generator shaft or cooling fan with sensing point on capscrew head or flat surface of drive disc at bolt circle diameter.
Bar the engine over in a clockwise rotation as viewed from engine flywheel; do not allow it to roll back on compression.
Record maximum positive and negative dial indicator readings as the engine completes one revolution.
T.I.R. equals the sum of the maximum positive and negative readings.
Maximum T.I.R. should not be more than .001 inch for each inch of radius.
Remove equal shims from under both generator mounting feet to lower the generator.

Angular Alignment Procedure (750 kW gensets and larger) adjustment

⚠ Accidental starting during this procedure presents hazard of severe injury or death

⚠ Do not bar engine over by prying on fan blade

Tools: dial indicator

Disconnect negative battery cable(s) before beginning
Fasten dial indicator to generator shaft or cooling fan, sensing point on capscrew head or drive disc flat surface
Bar engine over in clockwise rotation as viewed from flywheel, do not allow roll-back at end of travel
Record total indicator reading (T.I.R.) as sum of max positive and negative readings over one revolution
Calculate shim correction using ratio of generator shaft-to-indicator distance vs generator mounting bolt distance
Add or remove shims from both generator mounting feet as calculated

Angular Alignment Procedure (Generator to Engine) adjustment

⚠ Accidental starting during this procedure presents the hazard of severe personal injury or death.

⚠ Do not bar engine over by prying on fan blade.

Tools: dial indicator

Disconnect the negative (-) battery cable(s) before beginning.
Fasten a dial indicator to the generator shaft or cooling fan with sensing point resting on the drive disc capscrew head/flat surface at the bolt circle diameter.
Bar the engine over in a clockwise rotation as viewed from the engine flywheel; do not allow it to roll back on compression at the end of travel of each reading.
Record the total indicator reading (T.I.R.) as the sum of the maximum positive and negative dial indicator readings over one engine revolution.
Compare the measured T.I.R. to the maximum allowed (.001 in. per inch of radius from center of shaft to indicator axis); add or remove shims under the generator mounting feet to correct.

Axial Alignment Procedure (750 kW gensets and larger) adjustment

Tools: dial indicator

Check axial alignment only when objectionable vibration is present after angular alignment
Fasten dial indicator holding device to skid base/engine block/generator shell, sensor on generator shaft hub
Bar engine over clockwise through a couple of rotations, recording readings at eight equally spaced points
If out of tolerance, remove capscrews connecting drive discs and flywheel, mark discs, reposition holes 180 degrees
Reinstall capscrews and retorque; recheck alignment; try 30/60/90 degree repositioning if unchanged

Axial Alignment Procedure (Generator to Engine) adjustment

Tools: dial indicator

Fasten a dial indicator holding device to the skid base, engine block, or generator shell with the sensor point resting on the generator shaft hub.
Bar the engine over in a clockwise rotation through a couple of rotations, recording indicator readings at eight equally spaced points around the shaft diameter to obtain axial T.I.R.
Reduce the measured T.I.R. runout by one half if excessive vibration remains after angular alignment.

Gain Adjustment adjustment

Close the main line circuit breaker and apply approximately 1/4 of the rated load.
Make sure the engine speed is constant.
Turn the GAIN potentiometer clockwise slowly until the engine speed is not constant.
Slowly turn the potentiometer counterclockwise until a constant speed is achieved, then an additional 1/2 division.

Governed Speed Adjustment adjustment

For 60 Hz full load, set engine no-load governed speed to 60.0 Hz (1800 RPM) isochronous, 61.8 Hz (1854 RPM) for 3% droop, or 63.0 Hz (1890 RPM) for 5% droop.
For 50 Hz full load, set engine no-load governed speed to 50.0 Hz (1500 RPM) isochronous, 51.5 Hz (1545 RPM) for 3% droop, or 52.5 Hz (1575 RPM) for 5% droop.
Use the SPEED ADJUST potentiometer on the engine instrument panel for fine speed adjustments of less than ±100 RPM.

Governor Calibration Checks adjustment

Tools: Frequency meter or tachometer, Jumper wire

Start the generator set.
Adjust engine no-load speed to the desired allowable speed droop using the Run Speed potentiometer.
With no load, turn GAIN clockwise slowly until engine speed oscillates.
Reduce GAIN slowly counterclockwise until engine speed is stable.
Upset the governor by momentarily shorting terminals 7 and 10 on the governor control.
Apply and remove loads to check generator set response.

HC4-7 Axial Alignment Procedure adjustment

Tools: Dial indicator with magnetic base or clamp

Check only when an objectionable vibration is present.
Fasten dial indicator holding device to skid base, engine block, or generator shell with magnetic base or clamp.
Position sensor point on the generator shaft hub.
Bar the engine over in a clockwise rotation as viewed from engine flywheel through a couple of rotations.
Record indicator readings in eight equally spaced points around the shaft diameter.
Remove the capscrews connecting drive discs and flywheel and mark discs and flywheel.
Rotate engine or generator so drive disc holes are repositioned 180 degrees from original location.
Put capscrews back in and retorque. Recheck shaft alignment.
If runout unchanged, rotate discs to 30, 60 or 90 degrees from original location.
If T.I.R. does not improve, inspect flywheel pilot and drive disc runouts.

P7 Axial Alignment Procedure adjustment

Check only when an objectionable vibration is present.
Remove the capscrews connecting drive discs and flywheel.
Mark the drive discs and flywheel with respect to each other.
Rotate engine or generator so drive discs holes are repositioned two bolt holes from original location.
Put capscrews back in and retorque. Recheck/record vibration levels.
Repeat this test until drive disc holes are repositioned 180 degrees from original location.
Review vibration data and position drive disc in lowest recorded level location.

Preliminary Governor Adjustments adjustment

Idle Speed potentiometer: turn screw counterclockwise 20 turns then clockwise 10 turns to set mid position.
Run Speed potentiometer: turn screw counterclockwise 20 turns then clockwise 10 turns to set mid position.
Gain potentiometer: turn the screw fully counterclockwise.
Droop potentiometer: turn fully counterclockwise for isochronous operation; approximately 40 for 3 percent droop; approximately 80 for 5 percent droop.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
		12 lead generator sets	Load wires are routed through the CTs	Reconnectable gensets (12 leads) have dual secondary CTs (3 pins); CT wire 2/3 to pin 2 (high voltage) or pin 3 (low voltage).
		6 lead generator sets	Generator output leads are routed through the CTs	Non-reconnectable gensets (6 leads) have single secondary CTs (2 pins).
		Cummins PowerCommand generic AC Reconnect Wiring Diagram 625-2755 (Rev. D) and 625-3100 (Rev. F)		Applies to models DFAA, DFAB, DFAC, DFBF, DFCB, DFCC, DFEB, DFEC, DFFB, DFGA, DFGB, DFJA, DFJB, DFJC, DFJD, DFLB, DFLC, DFLD, DFMB (625-2755) and models DFAA-DFMB plus DFCE, DFED, DQAA, DQAB, DQBA, DQBB (625-3100).
	A (U)	CT21	U load leads (A phase)	CT dot must face the generator; CT terminal 1 connects to metering circuit, terminal 2/3 to ground.
	B (V)	CT22	V load leads (B phase)	CT dot must face the generator; terminal 1 to metering circuit, terminal 2/3 to ground.
	C (W)	CT23	W load leads (C phase)	CT dot must face the generator; terminal 1 to metering circuit, terminal 2/3 to ground.
110 V - 120 V L-N	1	Single phase, 2-wire		PTC module jumper locations
190 V - 240 V L-L	3	Three phase		Use PTC module 0300-5382-01; 50/60 Hz
200 V - 240 V L-L	1	Single phase, 3-wire		PTC module jumper locations
380 V - 600 V L-L	3	Three phase		Use PTC module 0300-5382-02; 50/60 Hz

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

How many kW is the Cummins/Onan DFLC?

The Cummins/Onan DFLC is rated 1250 kW standby (1563.0 kVA).

What engine is in the Cummins/Onan DFLC?

The Cummins/Onan DFLC is powered by the Cummins/Onan KTA50 engine.

What kind of fuel does the Cummins/Onan DFLC run on?

The Cummins/Onan DFLC runs on Diesel.

What is the oil capacity of the Cummins/Onan DFLC?

The Cummins/Onan KTA50 engine in the Cummins/Onan DFLC has an oil capacity of 169.0 liters.

What is the cooling system capacity of the Cummins/Onan DFLC?

The Cummins/Onan DFLC cooling system holds 386 liters (102.0 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What is the continuous rating of the Cummins/Onan DFLC?

The Cummins/Onan DFLC is rated 1100 kW prime (1375 kVA), against 1250 kW standby.

How much does the Cummins/Onan DFLC weigh?

The Cummins/Onan DFLC has a dry weight of 10864 kg (23950 lb).

What voltage does the Cummins/Onan DFLC produce?

The Cummins/Onan DFLC is offered in 220/380 V, 240/415 V, 254/440 V, 277/480 V, 347/600 V, 2400/4160 V, Three Phase-phase.

What size battery does the Cummins/Onan DFLC need?

The Cummins/Onan DFLC uses 4 batteryies, 24 V each, 1400 CCA, group 8D, per the manufacturer specification sheet.

What alternator comes on the Cummins/Onan DFLC?

The Cummins/Onan DFLC uses a Not specified alternator.

Which oil filter part number does the Cummins/Onan DFLC take?

The Cummins/Onan DFLC uses oil filter part number LF3325.

Which fuel filter part number does the Cummins/Onan DFLC take?

The Cummins/Onan DFLC uses fuel filter part number FS1006.

What air filter fits the Cummins/Onan DFLC?

The Cummins/Onan DFLC uses air filter part number 140-2098.

Troubleshooting

Fault codes

Code	Meaning
1131	Battle Short mode is enabled.
1416	An overridden shutdown fault occurs, but the genset does not shut down.
234	Overspeed fault.
1433	Emergency Stop fault.
1434	Remote Emergency Stop fault.
121	Speed Signal Lost fault.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan DFLC troubleshooting guide (37 entries) →

Repair guides

Step-by-step procedures compiled from the Cummins/Onan service manual for this model.

Parts

240

Part #	Description	Qty	System
0300-4623-29	DFLB (600V)	1	Current transformer	Amazon eBay
0300-4623-30	DFLC (600V)	1	Current transformer	Amazon eBay
0300-4623-33	DFLE (600V)	1	Current transformer	Amazon eBay
0300-4623-52	DFLB BR (0-480V)	1	Current transformer	Amazon eBay $162.95
0300-4623-54	DFLC BR (0-480V)	1	Current transformer	Amazon eBay
0300-4623-57	DFLE BR (0-480V)	1	Current transformer	Amazon eBay
106069	SCREW, HEXAGON HEAD CAP	6	Bolt	Amazon eBay
122-0757	Filter. Water - W/Corosion Inhibiting Chemical		Filter	Amazon eBay
130-3538	Chemical DCA4 Service Pre-Charging Complete System	1	Hose	Amazon eBay
130-3576	Clamp, Hose	1	Hose	Amazon eBay
140-2096	Element, Primary (Outer)	2	Air filter	Amazon eBay
140-2098	Air Cleaner - Throwaway Type	1	Air filter	Amazon eBay
140-2467	Element, Safety (Inner)	2	Air filter	Amazon eBay
140-2501	Cleaner, Air (Disposable)	2	Air filter	Amazon eBay $292.25 NAPA $292.42 FridayParts $152.02
140-2502	Band, Mounting – Air Cleaner	4	Air filter	Amazon eBay $69.95
140-2503	Bracket, Mounting	1	Air filter	Amazon eBay
140-3163	Cleaner, Air (No Replaceable Element)	2	Air filter	Amazon NAPA $292.42 FridayParts $152.02
140-3230	Cleaner, Air (Includes Elements - See Ref. No. 25 and 26)	4	Air filter	Amazon eBay FridayParts $856.89
148582	DOE, PIN	2	Dowel pin	Amazon eBay
149-2232	Starter - 24 VDC	3	Starter	Amazon eBay
193-0244	Sender, Pressure - 0i1	1	Sensor	Amazon eBay
193-0375	# Sender, Water Temperature	1	Sensor	Amazon eBay
205059	WASHER, PLAIN	4	Gasket	Amazon eBay
205230	BUSSING	34	Bushing	Amazon eBay FridayParts $37.49
205584	SCREW, TWELVE POINT CAP	18	Bolt	Amazon eBay FridayParts $38.90
205684	BRACKET, LIFTING	4	Bracket lifting	Amazon eBay
205741	SHIM, A/R .007 Inch O/S	8	Shim	Amazon eBay
205742	SHIM, A/R .008 Inch O/S	8	Shim	Amazon eBay
205743	SHIM, A/R .009 Inch O/S	8	Shim	Amazon eBay
205744	SHIM, A/R .020 Inch O/S	8	Shim	Amazon eBay
205745	SHIM, A/R .031 Inch O/S	8	Shim	Amazon eBay
206028	SCREW, SOCKET HEAD CAP	4	Bolt	Amazon eBay
206224	PLUG, EXPANSION	2	Expansion plug	Amazon eBay
206580	BEARING, MAIN	7	Main bearing	Amazon eBay
206581	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper	7	Main bearing	Amazon eBay
206582	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper	7	Main bearing	Amazon eBay
206583	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper	7	Main bearing	Amazon eBay $74.95
206584	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper	7	Main bearing	Amazon eBay
206587	CAP, MAIN BEARING	7	Bearing cap	Amazon eBay
206588	CAP, MAIN BEARING	7	Bearing cap	Amazon eBay
206590	BEARING, MAIN	7	Main bearing	Amazon eBay
206591	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower	7	Main bearing	Amazon eBay
206592	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower	7	Main bearing	Amazon eBay
206593	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower	7	Main bearing	Amazon eBay
206594	BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower	7	Main bearing	Amazon eBay $74.95
206600	BEARING, MAIN	2	Main bearing	Amazon eBay
206601	BEARING, MAIN A/R No.1&9, Upper	2	Main bearing	Amazon eBay
206602	BEARING, MAIN A/R No.1&9, Upper	2	Main bearing	Amazon eBay
206603	BEARING, MAIN A/R No.1&9, Upper	2	Main bearing	Amazon eBay
206604	BEARING, MAIN A/R No.1&9, Upper	2	Main bearing	Amazon eBay $74.95
206610	BEARING, MAIN	2	Main bearing	Amazon eBay
206611	BEARING, MAIN A/R No.1&9, Lower	2	Main bearing	Amazon eBay
206612	BEARING, MAIN A/R No.1&9, Lower	2	Main bearing	Amazon eBay
206613	BEARING, MAIN A/R No.1&9, Lower	2	Main bearing	Amazon eBay
206614	BEARING, MAIN A/R No.1&9, Lower	2	Main bearing	Amazon eBay
206742	PLUG, EXPANSION	16	Expansion plug	Amazon eBay
3000138	SUPPORT, BEARING	1	Support bearing	Amazon eBay
3000139	BEARING, THRUST	2	Thrust bearing	Amazon eBay
3001708	BEARING, THRUST A/R .010 Inch O/S	2	Thrust bearing	Amazon eBay
3001709	BEARING, THRUST A/R .020 Inch O/S	2	Thrust bearing	Amazon eBay
3001710	BEARING, THRUST A/R .030 Inch O/S	2	Thrust bearing	Amazon eBay
3001711	BEARING, THRUST A/R .040 Inch O/S	2	Thrust bearing	Amazon eBay
3002993	DOE, RING	32	Gasket	Amazon eBay FridayParts $73.40
3011076	SEAL, D RING	1	Seal	Amazon eBay
3011884	INSERT, LINER	1	Insert liner	Amazon eBay FridayParts $38.99
3014668	SEAL, D RING	1	Seal	Amazon eBay
3018210	SET, MAIN BEARING STANDARD	1	Main bearing set	Amazon eBay FridayParts $497.50
3018211	SET, MAIN BEARING A/R .010 Inch O/S	1	Main bearing set	Amazon eBay
3018212	SET, MAIN BEARING A/R .020 Inch O/S	1	Main bearing set	Amazon eBay
3018213	SET, MAIN BEARING A/R .030 Inch O/S	1	Main bearing set	Amazon eBay
3019150	INSERT, LINER	1	Insert liner	Amazon eBay FridayParts $90.59
3021148	INSERT, LINER	1	Insert liner	Amazon Amazon eBay eBay
3025485	WASHER, PLAIN	18	Gasket	Amazon eBay
3032633	SCREW, TWELVE POINT CAP	96	Bolt	Amazon eBay FridayParts $897.38
3033853	SHAFT, IDLER	2	Shaft idler	Amazon eBay
3081489	SEAL, OIL	1	Seal	Amazon eBay
309-0269	Sender, Temperature-Lo Engine	1	Sensor	Amazon eBay $239.00
309-0272	Regulator, Voltage - 24 VDC (Used on 35 A MP Alternator)	1	Alternator	Amazon eBay
309-0561	Alternator & Drive Components Group Pulley. Alternator - Multi Groove (Use with 35 A MP Alternator)	1	Alternator	Amazon eBay
3175281	SHAFT, IDLER	1	Shaft idler	Amazon eBay
3176857	DOE, RING	9	Gasket	Amazon eBay
3177556	SEAL, RECTANGULAR RING	6	Seal	Amazon eBay
3177945	SCREW, HEX FLANGE HEAD CAP	2	Bolt	Amazon eBay
3178450	WASHER, PLAIN	2	Gasket	Amazon eBay KuduParts $131.00 FridayParts $135.89
3178457	WASHER, PLAIN	3	Gasket	Amazon eBay
3178464	PLATE, COVER	2	Plate cover	Amazon eBay $74.95
3178803	CYLINDER BLOCK OPTION BP6089	1	Cylinder block	Amazon eBay
3178910	CYLINDER BLOCK	1	Cylinder block	Amazon eBay
3179664	VALVE, PISTON COOLING	1	Valve piston cooling	Amazon eBay FridayParts $95.50
338-2529	Harness. Wiring	1	Harness	Amazon eBay
338-2925	Hose, Radiator	1	Hose	Amazon eBay
3628452	SCREW, HEXAGON HEAD CAP	18	Bolt	Amazon eBay
3628605	PLUG, PIPE	18	Pipe plug	Amazon eBay
3628607	PLUG, PIPE	1	Pipe plug	Amazon eBay
3629168	PLUG, EXPANSION	12	Expansion plug	Amazon eBay
3629497	DRAINCOCK	3	Draincock	Amazon eBay $19.95
502-1162	Connector, Hose (3/8")	2	Hose	Amazon eBay
503-0183	Clamp, Hose	1	Hose	Amazon eBay
503-0685	Clamp, Hose	1	Hose	Amazon eBay $15.00
503-0868	Clamp, Hose - T-Bolt Type (3.5" NON)	3	Hose	Amazon eBay
503-1140	Hose, Rubber	2	Hose	Amazon eBay
503-1484	Elbow, Hose (45 Deg) (7" ID)	2	Hose	Amazon eBay
503-1620	Hose – Bulk (3/8" ID) (Order by the Foot)	-	Hose	Amazon eBay
503-1727	Hose, Radiator (3” ID x 10”)	2	Hose	Amazon eBay
503-1728	Hose (3” ID x 5–1/2”)	1	Hose	Amazon eBay
503-1743-01	Alternator & Orive Components Group Pulley, Alternator - Multi Groove (Use with 35 AMP Alternator)	1	Alternator	Amazon eBay
503-1870-11	Clamp, Hose	2	Hose	Amazon eBay
503-1870-12	Clamp, Hose	2	Hose	Amazon eBay
505-0324	Hose. Bulk (Sold by the Foot) Two Feet Required Nipple, Pipe - Half (3/4 NPT x 2"LG)	1	Hose	Amazon eBay
508-0292	Washer, Sealing - Copper	1	Seal	Amazon eBay
518-0548-24	Clamp, Hose	2	Hose	Amazon eBay
68445	PIN, GROOVE	32	Pin	Amazon eBay
70662	DOE, PIN	2	Dowel pin	Amazon eBay
960-0504	PCC Control Service Manual	*	Service manual	Amazon eBay
960-0507	Detector Control Service Manual	**	Service manual	Amazon eBay $49.00
98-5347	Decal - Caution Fan Drive & Lube Components Group Belt.	2	Belt	Amazon eBay
98-5759	Drive - Multi Groove Hose, Flexible - Lube (Grease)	1	Hose	Amazon eBay
98-5842	Clamp, Hose - T-Bolt Type (3.5" NON)	1	Hose	Amazon eBay
FS1216	Fuel/Water Sep Spin-On	2	Fuel filter	Amazon eBay $49.99 NAPA $65.16 FridayParts $48.99
LF3325	Full-flow spin-on lubricating oil filter element	5	Oil filter	Amazon eBay $229.00 NAPA $37.15 KuduParts $74.00 FridayParts $75.99
S-112	SCREW, HEXAGON HEAD CAP	12	Bolt	Amazon Amazon eBay eBay FridayParts $116.02
S-604	WASHER, LOCK	12	Gasket	Amazon eBay
S-610	WASHER, LOCK	6	Gasket	Amazon eBay FridayParts $88.56
016-40820	Harness, Wiring (Includes Cable Ties and Terminals)	17	Service part / kit	Amazon eBay
102-1335	Plug, Oil Drain	1	Service part / kit	Amazon eBay
130-2981	Cap. Radiator - 7#PSI	1	Service part / kit	Amazon eBay $249.00
130-3758	Radiator (includes Cap)	1	Service part / kit	Amazon eBay
140-1260	Fitting, Safety Filter	2	Service part / kit	Amazon eBay $116.27 NAPA $10.13
140-1548	Indicator, Service	1	Service part / kit	Amazon eBay $49.99 NAPA $32.16
140-2097	Cleaner, Air (Includes Elements)	1	Service part / kit	Amazon eBay FridayParts $856.89
140-2099	Band	2	Service part / kit	Amazon eBay
140-2395	Tube, Air Inlet	1	Service part / kit	Amazon eBay
140-2504-01	Bracket - Right Side	1	Service part / kit	Amazon eBay
140-2504-02	Bracket - Left Side	1	Service part / kit	Amazon eBay
140-2508	Tube, Air Inlet (7" x 9" - 3/4")	2	Service part / kit	Amazon eBay
140-2509	Tube, Air Inlet	2	Service part / kit	Amazon eBay
140-2515	Bracket, Mounting	1	Service part / kit	Amazon eBay
140-2519	Tube, Air Inlet	2	Service part / kit	Amazon eBay
140-2521	Tube, Air Inlet	2	Service part / kit	Amazon eBay
140-2528	Shield – Air In Heat	1	Service part / kit	Amazon eBay
300-2856	Board Assy, Printed Circuit	1	Service part / kit	Amazon eBay
300-2863	Board Assy, Printed Circuit - Relay Assembly- (A14)	1	Service part / kit	Amazon eBay
3007525	(3022157) KIT, LINER LINER, CYLINDER	1	Service part / kit	Amazon eBay FridayParts $276.80
301-9054-01	Decal - Panel Front Markings (Control With Meters)	1	Service part / kit	Amazon eBay
301-9054-02	Clip - Fastener	1	Service part / kit	Amazon eBay
301-9054-03	Clip - Fastener	1	Service part / kit	Amazon eBay
3012611	CYLINDER LINER (O/S) KIT, LINER A/R .020 inch O/S	1	Service part / kit	Amazon eBay
3012612	CYLINDER LINER (O/S) KIT, LINER A/R .030 Inch O/S	1	Service part / kit	Amazon eBay
302-1720	Meter, Frequency (M23)	1	Service part / kit	Amazon eBay
302-1753	Ammeter (M22) See Current Transformer & Ammeter Installation Figure for Parts)	1	Service part / kit	Amazon eBay
302-1800	Ammeter (M22) Scale in Amps as Indicated 0-2000/0-4000 (600 VAC Application) 0-3000/0-6000 (120-480 VAC Application)	1	Service part / kit	Amazon eBay
302-1908	Screw. Cap - Hex Head (M8-1.25 x 35MM)	2	Service part / kit	Amazon eBay
305-0813-01	Battery charger, Onan, 120V, 375W		Service part / kit	eBay $520.00
305-0818-02	EOOO-21002	1	Service part / kit	Amazon eBay
307-1056	Relay. 24 VDC	3	Service part / kit	Amazon eBay $49.00
307-1987	2 307-1056 3 3 815-0388 6 4 323-0804 3 5 815-0544 3 6 319-0447 1 7 NOTE 1 REF 8 NOTE 2	6	Service part / kit	Amazon eBay
308-0882	Decal - Panel Front Markings (Control Without Meters)	1	Service part / kit	Amazon eBay
309-0436	Decal - Model Identification ONAN GEN SET CUMMINS GEN SET CUMMINS ONAN GEN SET	1	Service part / kit	Amazon eBay
309-0437	(222"F)	1	Service part / kit	Amazon eBay
309-0635-02	Valve, Check	2	Service part / kit	Amazon eBay
319-0447	Screw. Machine - Pan Head. Cross-Recessed Drive (#6-32 x 1/2")	1	Service part / kit	Amazon eBay
319-0754	Tie. Cable	1	Service part / kit	Amazon eBay
322-0363	Component 322-0363	1	Service part / kit	Amazon eBay
323-0804	Screw. Machine - Round Head with IT Lock Washer (#6-32 x 1/2")	3	Service part / kit	Amazon eBay
323-1200	# Socket, Contact (Used in J1, J2)	1	Service part / kit	Amazon eBay
323-1304	tiotming, Umector	1	Service part / kit	Amazon eBay
323-1306	Genset component (SJB series)	1	Service part / kit	Amazon eBay
3318201	Battery Cable Group	1	Service part / kit	Amazon eBay
332-0052	Clamp, Loop	1	Service part / kit	Amazon eBay
332-0607	Block, Terminal (T81)	1	Service part / kit	Amazon eBay
332-1279	Terminal. Lug - Ring (3/8	6	Service part / kit	Amazon eBay
332-1292	Terminal Board (Includes Parts Marked #)	1	Service part / kit	Amazon eBay
332-1445	Tie, Cable 18 98-5219 1 Decal - Panel Front (Not I l l u s t r a t e d ) 19 98-5220 1 Decal	3	Service part / kit	Amazon eBay
332-1673	Terminal, Wire - Spade	2	Service part / kit	Amazon eBay
332-2634	Clamp, Hose	1	Service part / kit	Amazon eBay
332-2723	Strip. Marker	1	Service part / kit	Amazon eBay
338-1835	Harness, Wiring (A13 to A l l )	1	Service part / kit	Amazon eBay
338-1836	Harness, Wiring (A14 to All) (Relays)	1	Service part / kit	Amazon eBay
338-1904	Harness. Wiring (A15 to All)	1	Service part / kit	Amazon eBay
338-2278	Harness. Wiring - AC (Includes Terminal Block & Cable Ties) [Used only with meters]	1	Service part / kit	Amazon eBay $77.00
338-2532	Terminal. Lug - Forked (No. 6 Screw)	4	Service part / kit	Amazon eBay
355-0093	Voltmeter (M21) Dual Scale 0-300/0-600V Single Scale 0-750V	1	Service part / kit	Amazon eBay
3801268	CYLINDER LINER (O/S) KIT, LINER A/R .040 Inch O/S	1	Service part / kit	Amazon eBay
406-0333	Component 406-0333	2	Service part / kit	Amazon eBay
406-0334	Clip, Retaining - Turnbutton Fastener	2	Service part / kit	Amazon eBay
501-0520	Screw, Cap - Hex Head (3/8-24 x 5/8")	1	Service part / kit	Amazon eBay
501-0524	Washer, Lock - EIT (3/8")	1	Service part / kit	Amazon eBay
501-0558	Line. Flexible - Bypass	1	Service part / kit	Amazon eBay
503-1717	Elbow, Reducer (45 Deg) (7" ID to 6" ID)	2	Service part / kit	Amazon eBay
503-1720	Insert, Reducer (6" OD to 5-1/2" ID)	2	Service part / kit	Amazon eBay
503-1730	503-0183 21 503-1731 22 505-0324 23 504-0171 24 505-0102 25 505-0132 26 505-0102 27 28 29	1	Service part / kit	Amazon eBay
504-0028	Valve, Radiator Drain	1	Service part / kit	Amazon eBay
505-0007	Belt. Drive - Multi Groove (Used with 35 A MP Alternator * Pulley, Alternator - Multi Groove (Use with 75 A MP Alternator)	2	Service part / kit	Amazon eBay
505-0017	Bushing, Pipe – Reducer (3/8" to 1/4")	2	Service part / kit	Amazon eBay $99.95
505-0021	Bushing, Pipe - Reducer (3/4º to 1/2º)	1	Service part / kit	Amazon eBay
505-0100	Nipple, Pipe - Close (1/2”)	1	Service part / kit	Amazon eBay $9.34
505-0102	Filter. Water - W/Corosion Inhibiting	1	Service part / kit	Amazon eBay
505-0117	Bushing, Reducer - Flush, Brass (1/2' NPT x3/8° NPT)	1	Service part / kit	Amazon eBay
505-0132	Nipple, Pipe - Close (3/4 NPT x l-3/8"LG) Elbow. Pipe - 90* (3/4 NPT)	1	Service part / kit	Amazon eBay
505-0376	Elbow – 45 Deg (3/8")	2	Service part / kit	Amazon eBay
508-0015	Washer, Insulating - Fiber (#8)	1	Service part / kit	Amazon eBay
511-0161-02	.*	2	Service part / kit	Amazon eBay
517-0131	Capacitor (Used across Voltmeter Terminals on some Sets)	1	Service part / kit	Amazon eBay
518-0548-42	Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper)	20	Service part / kit	Amazon eBay
526-0030	Washer, Flat (3/8")	1	Service part / kit	Amazon eBay
800-0055	Screw, Cap – Hex Head (3/8–16 x 2-1/4")	1	Service part / kit	Amazon eBay
800-0062	Nut, Insulated	1	Service part / kit	Amazon eBay
800-0094	Screw, Cap – Hex Head (1/2–13 x 2")	1	Service part / kit	Amazon eBay
800-0270	DCA4 Service Pre-Charging Complete System	1	Service part / kit	Amazon eBay
800-2060	Screw, Cap - Hex Head (M8x 1.25 x35)	1	Service part / kit	Amazon eBay
809-0035	Screw, Machine - Thread Cutting, Round Head (#8 X 3/4')	1	Service part / kit	Amazon eBay
812-0063	853-0003 300-2856 338-1836 812-0063 853-0003 300-2863 338-1835 332-1445 NOTE 1 NOTE 2 332	2	Service part / kit	Amazon eBay
812-0065	Screw, Machine - Round Head (#6 - 32 x 5/8')	2	Service part / kit	Amazon eBay
812-0084	Screw. Machine - Round Head (	4	Service part / kit	Amazon eBay
815-0388	Bracket. Mounting - Relay Lead(s), Electrical Wire, Electrical - 20 AW G, Insulated Terminal, Wire - Forked, 18-20 Gauge	6	Service part / kit	Amazon eBay
815-0544	Screw, Machine - Round Head IT Washer (#6 - 32 x 1/2')	3	Service part / kit	Amazon eBay
821-0004	Screw, Self-Locking - Hex	4	Service part / kit	Amazon eBay
821-0029	Screw, Self–Locking – Hex Washer Head (3/8–16 x 3/4")	1	Service part / kit	Amazon eBay
821-0033	Screw, Self–Locking – Hex Washer Head (7/16–14 x 3/4")	8	Service part / kit	Amazon eBay
821-5004-03	Screw, Self-Locking – Hex Washer Head (3/8–16 x 1")	2	Service part / kit	Amazon eBay
850-0050	Washer, Lock - Spring (3/8”)	2	Service part / kit	Amazon eBay
853-0003	Washer, Lock - ET (#6)	4	Service part / kit	Amazon eBay
856-0008	Washer, Lock - EIT (5/16'1)	1	Service part / kit	Amazon eBay
856-0010	Washer, Lock - EIT (3/8')	1	Service part / kit	Amazon eBay
870-0131	Nut. Hex - with ET (#10-32)	1	Service part / kit	Amazon eBay
870-0196	Nut, Insulating (#8)	1	Service part / kit	Amazon eBay
870-0281	Nut, Self-Locking – Hex Washer Head (3/8–16)	4	Service part / kit	Amazon eBay
98-4732	Caution	1	Service part / kit	Amazon eBay
98-4798	Decal - Caution "7# PSI HOT WATER SYSTEM"	1	Service part / kit	Amazon eBay
98-5298	Decal - Panel Rear Markings (All Control Panels)	1	Service part / kit	Amazon eBay
98-5299	Decal - Panel Rear Markings (All Control Panels)	1	Service part / kit	Amazon eBay
98-5316	Decal - Panel Rear Markings (All Control Panels)	1	Service part / kit	Amazon eBay
98-5387	Nut, Self-Locking - with ET Lockwasher (#10-32)	1	Service part / kit	Amazon eBay
98-5393	Screw, Tapping - Round Head (#8 x 3/4")	2	Service part / kit	Amazon eBay
98-5822	Bushing, Reducer - Flush (1/2 NPT x 3/8 NPT)	3	Service part / kit	Amazon eBay
98-6108-03	Decal - Model Identification	1	Service part / kit	Amazon eBay
98-6111-03	ONAN GEN SET CUMMINS GEN SET	1	Service part / kit	Amazon eBay
98-6139-03	CUMMINS ONAN GEN SET	1	Service part / kit	Amazon eBay
98-6169	Terminal Assembly (Includes Replaceable Items 26 thru 29)	1	Service part / kit	Amazon eBay
F-2375	A single line drawing of the prime power system		Service part / kit	Amazon eBay

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

Rating	Load	L/h	gal/h
Prime		76.9	291.0
Prime	3%	58.7	222.0
Prime	100%	23.6	89.0
Standby		167.5	44.2
Standby	3%	65.9	249.0
Standby	100%	292.6	77.2

Available documents

Spec sheet — Cummins-dflc-spec-sheet (Cummins/Onan)Spec sheet — Cummins-installation-manual-DFAA-DFAB-DFAC-DFBC-DFBF-DFBD-DFBE-DFBF-DFCB-DFCC-DFCE-DFEB-DFEC-DFED-DFFA-DFFB-DFGA-DFGB-DFGC-DFJA-DFJB-DFJC-DFJD-DFLA-DFLB-DFLC-DFLD-DFLE-DFMB-DQAA-DQAB-DQBA-DQBB (Cummins/Onan)Operator's manual — 960-0140 Cummins DFLA DFLx KTA51 KTA5x Operator's Manual (9-1989) (Cummins/Onan)Operator's manual — 960-0152 Cummins DFLB C D DFMB Operator's Manual (7-2010) (Cummins/Onan)Operator's manual — Cummins-DFLB-DFLC-DFLE-generator-set-operator-manual (Cummins/Onan)Parts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Parts manual — 0960-0296 I10 202106 (Cummins/Onan)Parts manual — 960-0283 Onan DFLB DFLC DFLD DFMB Parts manual (9-2000) (Cummins/Onan)Parts manual — Cummins-DFLB-DFLC-DFLE-generator-set-parts-manual (Cummins/Onan)Service manual — 9-3Service manual — 960-0504 Onan DFxx series Generator Control Service Manual 04-1993 (Cummins/Onan)Service manual — 960-0507C Cummins DFAA thru DFMB DQAA Service Manual (2-2004) (Cummins/Onan)Service manual — 960-0519C Cummins DFAB DFB DFC DFG DFLC Series Service Manual (2-2004) (Cummins/Onan)Service manual — 960-0619D Cummins DFA DFB DFC DFE DFF DFG DFJ DFL DFM DQA DQB Installation (6-2003) (Cummins/Onan)Service manual — 960-0630C Cummins DFGB DFGE DFLB DFLC DFLE Installation Manual (2-2004) (Cummins/Onan)Service manual — Cummins-3100-PowerCommand-DFAA-DFAB-DFAC-DFBC-DFBD-DFBE-DFBF-DFCB-DFCC-DFCE-DFEB-DFEC-DFED-DFFA-DFFB-DFGA-DFGB-DFGC-DFJA-DFJB-DFJC-DFJD-DFLA-DFLB-DFLC-DFLD-DFLE-DFMB-DQAA-DQAB-DQBB (Cummins/Onan)Service manual — DFxx Generator Set Service Manual PCC3100 (Cummins/Onan)Service manual — Detector Control Generator Set Service Manual (Cummins/Onan)

This page was generated from the 18 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

Cummins/Onan DFLC Generator Set

Service parts for the DFLC

Air intake

Fuel system

Oil system

Belts

Specifications

Engine

Filters for the Cummins/Onan KTA50

Same engine, other brands

Maintenance & consumables

Service intervals

Service specifications

Recommended fluids

Fault codes

Procedures

Voltage reconnection

Common questions

Troubleshooting

Fault codes

Repair guides

Parts

Fuel consumption

Available documents