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

Service parts for the DQAD

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

Oil system

1 required

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

Specifications

Fuel	diesel
Frequency	60.0 Hz
Controller	PCC PowerCommand 3100, PowerCommand 3100, PowerCommand 3100 (PCC 3100), PowerCommand 3100 (PCC), PowerCommand PCC 3100
Oil capacity	36.7 L
Phase	3
Battery group	8D
Battery cranking	900 CCA
Battery voltage	12 V
Battery quantity	2
Coolant capacity	40 L

Engine

Cummins/Onan QSM11

Oil capacity	34.0 L
Coolant capacity	40.0 L
Displacement	10.8 L
Aspiration	Turbocharged, aftercooled
Rated speed	2300 rpm

Filters for the Cummins/Onan QSM11

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	P559000	Lube Filter, Spin-On Full Flow	CUMMINS 2101869, CUMMINS 2882674, NAPA 400107, BALDWIN BD7154	KuduParts $17.00 FridayParts $36.00
Oil filter	P550949	Lube Filter, Spin-On Full Flow	CUMMINS 2882673, CUMMINS 4331005, NAPA 400107, BALDWIN B7322	KuduParts $67.00 FridayParts $69.59
Fuel / water separator	P551000	Fuel Filter, Water Separator Spin-On Twist&Drain	CUMMINS 3161407, CUMMINS 3329289, NAPA 3406, BALDWIN BF1259	FridayParts $99.00
Fuel / water separator	P558000	Fuel Filter, Water Separator Spin-On Twist&Drain	CUMMINS 3308638, CUMMINS 3308683, NAPA 3405, NAPA 3693	KuduParts $24.00 FridayParts $25.66

Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:

System	Filter	Description	Cross-references
Fuel filter	P550440	Fuel Filter, Spin-On Secondary	CUMMINS 3831063, CUMMINS 3890707, NAPA 3358, BALDWIN BF788	FridayParts $356.80
Coolant filter	P552071	Coolant Filter, Spin-On Sca Plus	CUMMINS 299080, CUMMINS 299880, NAPA 4071, TORO 012706560	FridayParts $37.53

Maintenance & consumables

for the Cummins/Onan QSM11

Item	Spec	Part #	Interval
Air filter	K&N RU-3220	—	1500 hr
Fuel filter	Cummins Filtration FS1000	—	600 hr
Oil filter		3397929	600 hr	Amazon eBay
Battery	Two, 12 Volt, Group 8D, Cold Cranking Amps (minimum) 900; vented, lead acid	—	6000 hr
Belt	Visually check belt for evidence of wear or slippage; replace if hard or brittle	—	6000 hr
Coolant	Use coolant solution per Cummins engine Operation and Maintenance Manual	—	500 hr
Coolant filter	Cummins Filtration WF2075	—	1500 hr
Oil	9.7 Gal (36.7 L); API classification per Cummins engine Operation and Maintenance Manual	—	6000 hr
Spark plug		—	1500 hr

Service intervals

Item	Action	Hours	Months	Notes
Charge Air Piping	Check	8 hr		Daily or after 8 Hours; tighten hose clamps to 74 inch-lbs (8 N-m) if necessary
Coolant Level	Check	8 hr		Daily or after 8 Hours
Fuel Level	Check	8 hr		Daily or after 8 Hours
Genset	Inspect	8 hr		Daily or after 8 Hours; check for oil, fuel, cooling and exhaust system leaks; check exhaust system audibly and visually with set running
Oil Level	Check	8 hr		Daily or after 8 Hours
Air Cleaner	Check	50 hr		Weekly or after 50 Hours; clean if required; perform more often in dusty conditions
Air cleaner	Clean	50 hr		Weekly or after 50 Hours; clean if required. Perform more often in dusty conditions.
Battery Charging System	Check	100 hr	1 mo	Weekly or after 50 Hours
Coolant heater(s)	Check	50 hr		Weekly or after 50 Hours
Crankcase Oil	Drain	50 hr		First service — Break-in: drain and replace crankcase oil after the first 50 hours of operation on new generator sets
Exhaust Condensate Trap	Drain	50 hr		Weekly or after 50 Hours
Fuel Filter(s)	Drain	100 hr	1 mo	Weekly or after 50 Hours; drain 1 cup or more of fuel to remove water and sediment; refer to Cummins engine Operation and Maintenance Manual
Fuel Tank (Water and Sediment)	Drain	50 hr		Weekly or after 50 Hours; drain 1 cup or more of fuel to remove water and sediment
Starting Batteries	Check	100 hr	1 mo	Weekly or after 50 Hours
Anti-freeze and DCA Concentration	Check	250 hr	6 mo	Monthly or after 100 Hours; refer to Cummins engine Operation and Maintenance Manual
Drive belt tension	Check	100 hr	1 mo	Monthly or after 100 Hours; visually check belt for wear or slippage, replace if hard or brittle.
Fuel tank water and sediment	Drain	100 hr	1 mo	Monthly or after 100 Hours; drain 1 cup or more of fuel to remove water and sediment.
Radiator Hoses for Wear & Cracks	Check	100 hr		Monthly or after 100 Hours
Battery electrolyte level	Check	200 hr		Check at least every 200 hours of operation; fill cells to bottom of filler neck.
Coolant Filter	Change	250 hr	6 mo	6 Months or after 250 Hours; refer to Cummins engine Operation and Maintenance Manual
Crankcase Breather	Clean	250 hr	6 mo	6 Months or after 250 Hours; refer to Cummins engine Operation and Maintenance Manual
Air cleaner element	Change	500 hr		Yearly or after 500 Hours; perform more often in dusty conditions.
Cooling system	Clean	500 hr	12 mo	Yearly or after 500 Hours; refer to Cummins engine Operation and Maintenance Manual
Crankcase oil and filter	Change	500 hr	12 mo	Yearly or after 500 Hours. Prime power: change every 6 months or 250 hours. Standby: change oil every 12 months or 250 hours, whichever comes first.
Fuel Filters	Change	500 hr		Yearly or after 500 Hours; refer to Cummins engine Operation and Maintenance Manual
Radiator hoses	Check	500 hr		Yearly or after 500 Hours; check for wear and cracks.
Rupture basin leak detect switch	Test	500 hr	12 mo	Yearly or after 500 Hours; check leak detect switch in sub-base fuel tank of optional enclosure, once a year or as required 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	Exhaust pipe clearance from combustible wall/partition	12	inches (305 mm)
Clearance	Float switch lift below C-clip stop	1/8 inch (3 mm)	inch (mm)	use a feeler gauge
Clearance	Fuel line clearance from electrical wiring	1/2	inch (12.7 mm)	minimum
Clearance	Fuel line clearance from hot exhaust parts	2	inch (51 mm)	minimum
Clearance	MPU sensor to flywheel gear tooth	back it out one quarter turn	turn	after sensor just touches gear tooth
Clearance	Minimum fuel level above fuel pump inlet for critical start	6	inches (150 mm)	recommended
Clearance	Vibration isolator top plate to base clearance	0.25	inch (6 mm)	nominal or greater
Other	Battery specific gravity (charge if below)	1.215		corrected
Other	Battery specific gravity (fully charged, corrected)	1.260		corrected to 80 F (27 C)
Other	Exhaust Outlet Size	5	in. NPT
Other	GOV RAMP adjustable range	0 through 10	seconds
Other	Ground Fault Relay current setting	5 to 1200	amperes
Other	Ground Fault Relay time delay setting	0 to 1	second
Other	Overcurrent warning	110% of rated for 60 seconds		generator output current
Other	Overload warning	105% of standby (or 115% of prime) rating		three-phase power output
Other	REG VHZ underfrequency roll-off adjustable range	1 through 50 (normal range 7 through 21)
Other	Short circuit shutdown	175% of rated		generator output current
Other	Voltage/frequency adjustment range (ADJUST menu)	+/- 5%	%
Pressure	Air cleaner cleaning air pressure	30	psi	cleaning element
Pressure	Air cleaner cleaning compressed air	30	psi (207 kPa)	max, clean side, nozzle at least 1 inch (25 mm) away
Pressure	Idle oil pressure	15	psi (104 kPa)	idle
Pressure	Idle oil pressure limit (unlabeled third value as printed)	8	psi	idle
Pressure	Idle oil pressure shutdown limit	12	psi	idle
Pressure	Idle oil pressure shutdown limit	8	psi (55 kPa)	idle
Pressure	Idle oil pressure warning limit	12	psi (83 kPa)	idle
Pressure	Idle oil pressure warning limit	15	psi	idle
Pressure	Max fuel inlet restriction	4	in. Hg (13.5 kPa)
Pressure	Max fuel return restriction	2.5	in. Hg (8.5 kPa)
Pressure	Max. Fuel Inlet Pressure	10	PSI (69 kPa)
Pressure	Max. Fuel Inlet Restriction	4	in. Hg. (13.5 kPa)
Pressure	Max. Fuel Return Restriction	2.5	in. Hg. (8.5 kPa)
Pressure	Maximum allowable exhaust back pressure	41	in. H20
Pressure	Maximum fuel inlet restriction	4	in. Hg.
Pressure	Maximum fuel return restriction	2.5	in. Hg.
Pressure	Normal oil pressure	207-345	kPa	normal operation
Pressure	Normal oil pressure	30-50	psi (207-345 kPa)
Pressure	Normal oil pressure shutdown limit	20	psi (138 kPa)
Pressure	Normal oil pressure warning limit	25	psi (172 kPa)
Pressure	Oil pressure shutdown limit	20	psi	normal operation
Pressure	Oil pressure warning limit	25	psi	normal operation
Pressure	Radiator cleaning compressed air/water	35	psi (242 kPa)	maximum
Pressure	Radiator cleaning water/air pressure (maximum)	35	psi	cleaning radiator
Resistance	Battery charge threshold	1.215	specific gravity	charge battery if reading below this
Resistance	Coolant temperature sender	500 to 2k	ohms
Resistance	Fully charged battery corrected specific gravity	1.260	specific gravity	corrected; add four gravity points (0.004) per 10°F above 80° F (27° C)
Resistance	Governor gain potentiometer R1 (between C-01-21 and C-01-49)	1.4k	ohms	plug C-01 removed from CM570 module
Resistance	PMG stator resistance	2	ohms
Resistance	PMG stator resistance	6	ohms
Resistance	PT primary	1K-2.5K	ohms
Resistance	PT secondary	140-225	ohms
Resistance	PT/CT module 3-ohm resistors (J8-15 to 14, J8-22 to 23, J8-7 to 8)	3	ohms
Resistance	Winding resistance (Exciter stator 0.096; Exciter rotor 1.25; Main rotor winding 11 N/A; Main stator winding 12 0.0076; winding 17 N/A; winding 07 0.0104)	0.096 / 1.25 / N/A / 0.0076 / N/A / 0.0104	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.096; Exciter rotor 1.4; Main rotor winding 11 N/A; Main stator winding 12 0.0056; winding 17 N/A; winding 07 0.008)	0.096 / 1.4 / N/A / 0.0056 / N/A / 0.008	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.096; Exciter rotor 1.64; Main rotor winding 11 N/A; Main stator winding 12 0.0044; winding 17 N/A; winding 07 0.006)	0.096 / 1.64 / N/A / 0.0044 / N/A / 0.006	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.096; Exciter rotor 1.75; Main rotor winding 11 N/A; Main stator winding 12 0.0036; winding 17 N/A; winding 07 0.0044)	0.096 / 1.75 / N/A / 0.0036 / N/A / 0.0044	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.136; Exciter rotor 0.91; Main rotor winding 11 0.0085; Main stator winding 12 N/A; winding 17 0.0115; winding 07 N/A)	0.136 / 0.91 / 0.0085 / N/A / 0.0115 / N/A	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.136; Exciter rotor 1.04; Main rotor winding 11 0.007; Main stator winding 12 N/A; winding 17 0.01; winding 07 N/A)	0.136 / 1.04 / 0.007 / N/A / 0.01 / N/A	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.136; Exciter rotor 1.17; Main rotor winding 11 0.0055; Main stator winding 12 N/A; winding 17 0.0075; winding 07 N/A)	0.136 / 1.17 / 0.0055 / N/A / 0.0075 / N/A	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.136; Exciter rotor 1.35; Main rotor winding 11 0.005; Main stator winding 12 N/A; winding 17 0.0052; winding 07 N/A)	0.136 / 1.35 / 0.005 / N/A / 0.0052 / N/A	ohms	approximate, at 68 F (20 C) +10%
Resistance	Winding resistance (Exciter stator 0.158; Exciter rotor 1.44; Main rotor winding 11 0.0037; Main stator winding 12 0.0148; winding 17 N/A; winding 07 0.011)	0.158 / 1.44 / 0.0037 / 0.0148 / N/A / 0.011	ohms	approximate, at 68 F (20 C) +10%

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		Use a coolant solution as recommended in the Cummins engine Operation and Maintenance Manual		40.0 L	Balanced coolant mixture of water, antifreeze and coolant additives; drain and replace every year or after 500 hours; 10.5 Gal (40 L) printed; gensets shipped with coolant added
Engine oil		Refer to the Cummins engine Operation and Maintenance Manual for lubricating oil classification and recommendations/specifications		36.7 L	Gensets are shipped with oil added; check oil level before initial start; 9.7 Gal (36.7 L) printed
Fuel	ASTM No. 2 diesel fuel				Cummins engines normally use ASTM No. 2 diesel fuel. They will also operate on alternate diesel fuels within specifications shown in Cummins engine Operation and Maintenance Manual.
Fuel	Diesel fuel				Do not use zinc coated or copper fuel lines with diesel fuel. Fuel connection at engine should be made with an approved flexible line.
Grease	Lithium based grease, Mobilux No. 2 or Shell Alvania R3		-30°C to 120°C	2.74 oz. (81 ml)	Generator end bearing lubricant; -22F to +248F (-30C to +120C). Grease equally divided between bearing, bearing cap cavity, and bearing cartridge cavity.

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	Engine is operating in idle mode.	Info	Engine continues at 800 RPM; normal when idle input grounded in RUN mode.
102	EMERGENCY STOP	Local or remote Emergency Stop.	Shutdown	Reset only at PCC front panel: pull button out, switch to Off, press Reset.
200	LOW OIL PRESSURE	Engine oil pressure dropped to an unacceptable level.	Warning	If critical loads, wait until next shutdown period then follow 201; else follow 201.
201	LOW OIL PRESSURE	Engine oil pressure dropped below shutdown trip point.	Shutdown	Check oil level, lines and filters; replenish if low; reset and restart. Contact service center.
204	OIL PRES SENDER	Engine oil pressure sender not functioning correctly.	Warning	Check sender connection. Contact an authorized service center.
210	LOW COOLANT TEMP	Coolant temperature 70° F (21° C) or lower; coolant heater not operating or not circulating.	Warning	Check coolant heater power, low coolant level, and leakage points.
211	HIGH COOLANT TEMP	Engine has begun to overheat (215° F standby / 207° F primary).	Warning	Reduce load if possible; check air inlets/outlets and remove obstructions.
212	HIGH COOLANT TEMP	Engine overheated (above 223° F standby / 215° F primary) or coolant level low.	Shutdown	Allow to cool; check coolant level, airflow, fan belt. Reset and restart. Contact service center if unresolved.
213	COOLANT SENDER	Coolant temperature sender resistance out of range.	Warning	Contact an authorized service center.
214	LOW COOLANT LVL	Engine coolant level fell below trip point.	Warning	Allow to cool; check and replenish coolant; repair leaks; reset and restart.
215	LOW COOLANT LVL	Engine coolant level fell below trip point.	Shutdown	Allow to cool; check and replenish coolant; repair leaks; reset and restart.
220	MAG PICKUP	Mag pickup speed indication not sensed or does not match genset output frequency.	Shutdown	Restart and check RPM on display. Contact service center.
221	FAIL TO CRANK	Possible fault with control or starting system.	Shutdown	Check battery cable connections, recharge/replace battery. Contact service center for starter system.
222	OVERCRANK	Possible fuel system problem.	Shutdown	Check fuel tank, leaks, plugged fuel lines; replace dirty fuel or air filters. Reset and restart.
223	OVERSPEED	Engine exceeded normal operating speed (2070 rpm @ 60 Hz; 1800 rpm @ 50 Hz).	Shutdown	Contact an authorized service center.
230	LOW DC VOLTAGE	Battery voltage below 24 VDC.	Warning	Check battery charger fuse; recharge/replace battery; clean and tighten battery cable connections.
231	HIGH DC VOLTAGE	Battery voltage exceeds 32 VDC.	Warning	Contact an authorized service center.
232	WEAK BATTERY	Battery voltage drops below 60% of nominal for two seconds during starting.	Warning	See Warning message 230, LOW DC VOLTAGE.
240	LOW FUEL − DAY	Day tank fuel supply running low.	Warning	Check fuel supply and replenish as required.
241	LOW FUEL	Fuel supply running low.	Warning	Check fuel supply and replenish as required.
250	EEPROM ERROR	PCC memory error; data corruption of critical operating parameters.	Shutdown	Contact an authorized service center.
251	EEPROM ERROR	PCC memory error; data corruption of noncritical operating parameters.	Warning	Contact an authorized service center.
252	EEPROM ERROR	PCC memory error; data corruption of noncritical operating parameters.	Warning	Contact an authorized service center.
260	CUSTOMER FAULT 1	Customer defined input closed to ground; function programmable as shutdown or warning.		Contact an authorized service center. Message is editable.
261	GROUND FAULT	Customer defined input closed to ground; function programmable as shutdown or warning.		Contact an authorized service center. Message is editable.
262	CM570/ENGINE	Engine control module (CM570) not properly operating.	Warning	Contact an authorized service center.
263	CM570/ENGINE	Engine control module (CM570) not properly operating.	Shutdown	Contact an authorized service center.
301	HIGH AC VOLTAGE	One or more phase voltages exceeded 130% of nominal, or 110% of nominal for 10 seconds.	Shutdown	Contact an authorized service center.
303	LOW AC VOLTAGE	One or more phase voltages dropped below 85% of nominal for 10 seconds.	Shutdown	Contact an authorized service center.
313	UNDER FREQUENCY	Engine speed dropped below 90% of nominal for 10 seconds.	Shutdown	Load Dump signal initiated five seconds before shutdown. Contact an authorized service center.
320	OVERCURRENT	Generator output current exceeded 110% of rated for 60 seconds.	Warning	Contact an authorized service center.
321	OVERCURRENT	Output current exceeded 110% of rated; PCC time/current calculation initiated shutdown.	Shutdown	Contact an authorized service center.
322	SHORT CIRCUIT	Generator output current exceeded 175% of rated.	Shutdown	Contact an authorized service center.
330	OVERLOAD	Three-phase output exceeds 105% of standby (or 115% of prime) rating.	Warning	Load Dump activated after 5 seconds; OVERLOAD warning after 60 seconds. Contact an authorized service center.
335	REVERSE POWER	Improper CT or PT phasing (non-parallel units only).	Shutdown	Contact an authorized service center.

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

Procedures

Adjust Start and Stop Delays adjustment

Press the button next to the word ADJUST in the Main Menu. The VOLTAGE submenu will appear.
Press the button next to the '>>' to move through the VOLTAGE and FREQUENCY submenus to the START DELAY submenu.
Use the buttons next to the '⇑' and '⇓' symbols to set the start delay. The start delay adjustment range is 0 to 300 seconds.
From the START DELAY submenu, press the button next to the '>>' to move to the STOP DELAY submenu.
Use the buttons next to the '⇑' and '⇓' symbols to set the stop delay. The stop delay adjustment range is 0 to 600 seconds.
From the STOP DELAY submenu, press the button next to the '>>' to move to the SAVE/EXIT submenu. Select SAVE to save your changes.
At the CHANGES SAVED submenu, select EXIT to return to the Main menu.

Adjusting Start/Stop Delays (PCC Adjust Menu) adjustment

Press button next to ADJUST in Main Menu to display VOLTAGE submenu
Press button next to >> to move through FREQUENCY submenu to STOP DELAY submenu
Use buttons next to arrows to set start delay, range 0 to 300 seconds
Use buttons next to arrows to set stop delay, range 0 to 600 seconds
Press >> to move to SAVE/EXIT submenu and select SAVE to retain changes, then EXIT

Axial Alignment Procedure (Aligning Generator with Engine) adjustment

Tools: Dial indicator holding device with magnetic base or clamp

Fasten a dial indicator holding device to skid base, engine block, or generator shell.
Position the indicator sensor point on the generator shaft hub.
Bar the engine over in a clockwise rotation through a couple of rotations.
Record indicator readings in eight equally spaced points around the shaft diameter.
To correct out-of-tolerance T.I.R., remove drive disc capscrews and mark discs and flywheel.
Rotate engine or generator so drive disc holes are repositioned 180 degrees from original location.
Reinstall capscrews and retorque; recheck alignment.
If T.I.R. is unchanged, rotate discs 30, 60, or 90 degrees from original location.

Converting Day Tank Controller from 120 VAC to 240 VAC adjustment

Remove jumpers between TB1-5/TB1-6 and TB1-7/TB1-8; connect two jumpers between TB1-6 and TB1-7
Move selector switch S103 on control PCB to down position for 240 VAC
If equipped with transformer, remove jumpers between H1/H3 and H2/H4 and connect two jumpers between H2 and H3

Converting Day Tank Controller from 240 VAC to 120 VAC adjustment

Remove two jumpers between TB1-6 and TB1-7; connect one between TB1-5/TB1-6 and one between TB1-7/TB1-8
Move selector switch S103 on control PCB to up position for 120V
If equipped with transformer, remove jumpers between H2/H3 and connect H1/H3 and H2/H4

Voltage and Frequency Adjustment adjustment

⚠ Improper calibration or adjustment of the PowerCommand control can cause equipment malfunction or damage. Calibration and adjustment must be performed by technically qualified personnel only.

Tools: Calibrated RMS multimeter (Fluke 87 or 8060A)

With the genset OFF, attach a calibrated frequency/voltmeter to the AC output from L1 to L2.
Select ADJUST from the Main Menu to display the VOLTAGE adjust menu.
Start the genset and allow it to reach normal operating speed.
Adjust VOLTAGE so that the calibrated voltmeter reads the desired voltage.
Select the Frequency adjust menu and verify/adjust frequency to the desired value.
Select EXIT if no adjustment was made; if an adjustment was made, SAVE then EXIT.

Generator/PCC Control Isolation Procedure diagnostic

⚠ HAZARDOUS VOLTAGE. Touching uninsulated parts inside the control housing and power output boxes can result in severe personal injury or death.

⚠ This test involves unregulated excitation; make sure all loads are disconnected and all faults cleared.

Tools: True RMS meter, Jumper leads

Throw the line circuit breaker OFF and shut down the set.
Remove plug 10 from connector 10 of the voltage regulator output module (A37).
Prepare to measure output voltage across generator terminals while the set is running.
Connect jumpers from a 12 volt battery to X (Field +) 10-6 red and XX (Field -) 10-3 brown.
Check polarity again; opposed polarity makes this test inconclusive.
Start the set and connect the battery negative (-) to the XX lead.
Rated or higher balanced voltage indicates generator circuitry is probably okay.
If unbalanced, troubleshoot main stator first; if uniformly low, troubleshoot exciter and field circuits first.

Ground Fault Alarm Relay Test diagnostic

Verify that the N-G Fault Indicator on the GFR is not lit. If lit, it indicates that the bonding jumper circuit (neutral to ground) is open. If genset does not require bonding jumper, a bonding jumper
Move the control switch to the Run position.
Press the TEST switch on the ground fault relay.
Verify that the control panel warning message is displayed and the Fault Indicator (>I) on the GFR is lit.
Reset the control panel fault (this will also reset the ground fault relay).

Rupture Basin Leak Detect Switch Test diagnostic

Remove the pipe fitting/switch assembly from the rupture basin tank.
Move the O/Manual/Auto switch to the MANUAL position.
Activate leak detect switch (move float upward).
Check control display for Rupture Basin fault message.
If no indication of fault, repair defective circuit.
Apply thread sealant to pipe fitting and install switch assembly.

Testing the Float Switch Assembly diagnostic

Tools: Ohmmeter, Feeler gauge

Remove the fuel pump control cover, disconnect the wiring jack and unscrew the assembly from the top of the day tank.
With an ohmmeter, test for continuity between each pair of colored leads while holding the assembly vertical.
Replace the assembly if any switch is open (all readings should be zero).
Lift each float in turn to 1/8 inch (3 mm) below the C-clip stop and test for continuity.
Replace the assembly if any switch does not open (all readings should be infinity).
Use pipe thread sealant when replacing the assembly.

Testing the Ground Fault Relay diagnostic

Verify N-G Fault Indicator on GFR is not lit; install bonding jumper at facility service entrance if required
Move control switch to Run position
Press TEST switch on ground fault relay
Verify control panel warning message is displayed and Fault Indicator on GFR is lit
Reset the control panel fault, which also resets the ground fault relay

Testing the PMG diagnostic

⚠ HAZARDOUS VOLTAGE. Touching uninsulated parts inside the control housing and power output boxes can result in severe personal injury or death.

Tools: Wheatstone bridge or digital ohmmeter, Voltmeter

Disconnect plug J10 from the voltage regulator output stage module.
Start the engine at the set and let the speed stabilize.
Measure voltage across lead pairs J10-1 & J10-4, J10-4 & J10-5, and J10-5 & J10-1.
Voltage should be at least 150 VAC for 50 Hz sets and at least 180 VAC for 60 Hz sets.
Voltages should be approximately the same for each set of leads.
Stop the set and measure resistance across the same lead pairs.
Refer to Table 6-3 for resistance values and Generator Reassembly for frame size.

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

Phase	Connection	Leads	Notes
	3-pole ATS system grounding	generator neutral to ATS, not bonded to ground at generator
	4-pole ATS system grounding	grounding electrode conductor and bonding jumper connect generator neutral to ground
	Alarm Relay K14 contacts	TB1 (jumper wire required for K14 relay option)	3-pole double-throw, same ratings as run relays; energized by any genset warning or shutdown
	B+ Input (RUN signal)	Blue (A37 J7)	Voltage regulator output module A37 J7 wiring connections (control)
	CT21 (+) In	White (A36 J9)	PT/CT Board (A36) J9 wiring connections
	CT21 (common) In	Gray (A36 J9)	PT/CT Board (A36) J9 wiring connections
	CT22 (+) In	Grn/Ylw (A36 J9)	PT/CT Board (A36) J9 wiring connections
	CT22 (common) In	Black (A36 J9)	PT/CT Board (A36) J9 wiring connections
	CT23 (+) In	Purple (A36 J9)	PT/CT Board (A36) J9 wiring connections
	CT23 (common) In	Blue (A36 J9)	PT/CT Board (A36) J9 wiring connections
	Current Transformers CT21/CT22/CT23	U (A phase)/V (B phase)/W (C phase) load leads	dot on CT must face toward generator; dual secondaries, wire 1 to pin 1, wire 2/3 to pin 2 (high voltage gensets) or pin 3 (low voltage gensets)
	Gen. Common In	Brown (A36 J9)	PT/CT Board (A36) J9 wiring connections to AC harness
	Ground Input	Purple (A37 J7)	Voltage regulator output module A37 J7 wiring connections (control)
	Phase A PMG power	Green (A37 J10)	Voltage regulator output module A37 J10 wiring connections (power)
	Phase B PMG power	Yellow (A37 J10)	Voltage regulator output module A37 J10 wiring connections (power)
	Phase C PMG power	Orange (A37 J10)	Voltage regulator output module A37 J10 wiring connections (power)
	Regulator Drive (+) Input	Gray (A37 J7)	Voltage regulator output module A37 J7 wiring connections (control)
	Regulator Drive (-) Input	White (A37 J7)	Voltage regulator output module A37 J7 wiring connections (control)
	Run Relay K11/K12/K13 contacts	TB1	3-pole double-throw, rated 10A at 28VDC or 120VAC 80%PF, 6A at 240VAC 80%PF, 3A at 480/600VAC 80%PF; energized when genset receives start signal
	Start in	Grn/Yel (A37 J7)	Voltage regulator output module A37 J7 wiring connections (control)
	Start solenoid	Black (A37 J7)	Voltage regulator output module A37 J7 wiring connections (control)
	X (Field +) Output	Red (A37 J10)	Voltage regulator output module A37 J10 wiring connections (power); X = red wire of connector 10-6
	XX (Field -) Output	Brown (A37 J10)	Voltage regulator output module A37 J10 wiring connections (power); XX = brown wire of connector 10-3
A	CT1 - U load leads	CT1	Route the appropriate leads through each CT; dot must face toward the generator
A	Gen. A In	Yellow (A36 J9)	PT/CT Board (A36) J9 wiring connections to AC harness
B	CT2 - V load leads	CT2	Route the appropriate leads through each CT; dot must face toward the generator
B	Gen. B In	Orange (A36 J9)	PT/CT Board (A36) J9 wiring connections to AC harness
C	CT3 - W load leads	CT3	Route the appropriate leads through each CT; dot must face toward the generator
C	Gen. C In	Red (A36 J9)	PT/CT Board (A36) J9 wiring connections to AC harness

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

What engine is in the Cummins/Onan DQAD?

The Cummins/Onan DQAD is powered by the Cummins/Onan QSM11 engine.

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

The Cummins/Onan DQAD runs on diesel.

What's the oil capacity on a Cummins/Onan DQAD?

The Cummins/Onan QSM11 engine in the Cummins/Onan DQAD has an oil capacity of 34.0 liters.

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

The Cummins/Onan DQAD cooling system holds 40 liters (10.6 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

What battery does the Cummins/Onan DQAD use?

The Cummins/Onan DQAD uses 2 batteryies, 12 V each, 900 CCA, group 8D, per the manufacturer specification sheet.

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

The Cummins/Onan DQAD uses oil filter part number 3397929.

Troubleshooting

Fault codes

Code	Meaning	Cause	Remedy
204	OIL PRES SENDER — WARNING	The control has sensed that the engine oil pressure sender is out of its working range; The sender connections could be bad; The sender, the harness, engine interface board (A31), digital board (A32), or analog board (A33) could be faulty	Check that the engine oil pressure sender is properly connected; Check the sender connections; Isolate to the sender, harness, engine interface board (A31), analog board (A33), or digital board (A32). Disconnect the oil pressure sender leads, and connect an oil pressure sender simulator to the harness. If the control responds to the simulator, replace the sender. If the control does not respond to the simulator, the PCC or the harness is bad. Install harness tool between A31 J2/P2. Check for +5 VDC at the sender (lead marked E1-B). If there is no 5 VDC at the sender: Check for 5 VDC at A31 J5-18. If yes, harness is bad. If no, check for 5 VDC at A31 J2-24. If yes, A31 is bad. If no, A33 is bad. If there is 5 VDC at the sender, use the sender simulator to generate a signal to A31 J2-23. If the pressure signal (.5 to 4.5 VDC) does not get to A31 J2-23, isolate to the harness or A31. If the pressure signal does get to A31 J2-23, refer to the analog/digital troubleshooting procedure (Table 4-30a/b)
210	LOW COOLANT TEMP — WARNING	Engine coolant heater is not operating or is not circulating coolant; Coolant heater not connected to power supply; Low coolant level; Open heater element; The sender, the harness or A31 could be bad; A31, the engine interface board, or A32, the digital board, could be bad	Check for the following conditions: a. Coolant heater not connected to power supply. Check for blown fuse or disconnected heater cord and correct as required. b. Check for low coolant level and replenish if required. Look for possible coolant leakage points and repair as required. c. Open heater element. Check current draw of heater; Isolate the source of the signal. Unplug the coolant temperature switch (S1) and reset the control. 1. If the 210 warning message drops out and does not reappear, replace the sender. 2. If the 210 warning message reappears and remains after control reset, disconnect A31 J4 and check continuity from P4−13 to GND. If there is continuity, replace the harness. If there is no continuity, replace circuit board A31; Isolate the source of the signal. Check J4−6/P4−6 on A32. 1. Install harness tool between A32 J4/P4. 2. Open J4−6 and reset the control. If fault drops out and does not return, replace A31. If fault returns after resetting the control, replace A32
211	HIGH COOLANT TEMP — WARNING	Indicates the engine coolant temperature is getting close to the recommended maximum temperature limit: 215° F (102° C) − standby or 207° F (97° C) − prime	If generator is powering non-critical and critical loads and cannot be shut down, use the following: a. Reduce load if possible by turning off non-critical loads. b. Check air inlets and outlets and remove any obstructions to airflow. If engine can be stopped, follow HIGH COOLANT TEMP 212 − SHUTDOWN procedure. To check coolant temperature, access the coolant temperature menu prior to clearing the fault
212	HIGH COOLANT TEMP — SHUTDOWN	Indicates engine has overheated (coolant temperature has risen above the shutdown trip point: 223° F (106° C) − standby or 215° F (102° C) − prime	Allow engine to cool down completely before proceeding with the following checks: a. Check for obstructions to cooling airflow and correct as necessary. b. Check fan belt and repair or tighten if necessary. c. Check coolant mixture. d. Check blower fan and circulation pumps on remote radiator installations. e. Reset control and restart after locating and correcting problem
213	COOLANT SENDER — WARNING	Indicates that the resistance of the coolant temperature sender is out of range; The sender connections could be bad; The sender, the harness, engine interface board (A31), digital board (A32), or analog board (A33) could be faulty	Check the resistance of the sender. Resistance should be 500 to 2k ohms; Check the sender connections; Isolate to the sender, harness, engine interface board (A31), analog board (A33), or digital board (A32). Disconnect the sender, and plug in a resistive sender simulator to isolate the fault. a. If the control responds to the simulator, replace the sender. b. If the control does not respond to the simulator, refer to the high coolant temp troubleshooting procedure
214	LOW COOLANT LVL — WARNING	Indicates engine coolant level has fallen below the trip point	Allow engine to cool down completely before proceeding. a. Check coolant level in both radiator and coolant recovery bottle and replenish if low. Look for possible coolant leakage points and repair if necessary. b. Reset control and restart after locating and correcting problem. LOW COOLANT LVL Shutdown will not occur if genset is in Idle mode (low coolant warning only)

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan DQAD troubleshooting guide (195 entries) →

Repair guides

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

Parts

Part #	Description	Qty	System
12000180	Fuel inlet to pump	1	Pump	Amazon eBay
12000183	Fuel filter	1	Fuel filter	Amazon eBay
12000185	Power steering pump mounting location	1	Pump	Amazon eBay
12000186	Oil pressure and temperature sensor	1	Oil pressure and temperature sensor	Amazon eBay
12000187	Engine position sensor	1	Engine position sensor	Amazon eBay
13200052	Slow Idle Feature		Slow idle feature	Amazon eBay
13200060	Engine Speed Control Switch		Engine speed control switch	Amazon eBay
13200087	Oil Pressure Gauge		Oil pressure gauge	Amazon eBay
15600049	Fuel Shutoff Valve		Fuel shutoff valve	Amazon eBay
19400715	OEM Interface 21-Pin Harness Connector		Hose	Amazon eBay
19400718	OEM Interface 24-Pin Harness Connector		Hose	Amazon eBay
2871254	Starter 12V		Starter	Amazon eBay
2874862	Alternator 12V		Alternator	Amazon eBay
2874863	Alternator 24V	As needed	Alternator	Amazon eBay FridayParts $200.27
3037425	Belt		Belt	Amazon eBay $22.85
3103916	Starter 24V		Starter	Amazon eBay $393.22 FridayParts $298.65
3200069	STOP CHECK!		Stop check	Amazon eBay
33200082	Engine Stop Button		Engine stop button	Amazon eBay
3375049	Oil Filter Wrench	1	Oil filter	Amazon eBay
3376326	pulley pusher (2)		Pulley pusher	Amazon eBay
3376807	Fuel filter	1	Fuel filter	Amazon eBay
3377401	pulley pusher adapter (1)		Pulley pusher adapter	Amazon eBay
3397929	Oil filter wrench	1	Oil filter	Amazon eBay
38200567	Idle Adjustment Switch		Idle adjustment switch	Amazon eBay
39200434	Governed rpm		Rpm governor	Amazon eBay
43200085	Voltmeter		Voltmeter	Amazon eBay
43200086	Tachometer w/Hour Meter		Tachometer	Amazon eBay
49c00185	Data Link		Data link	Amazon eBay
A40-TB1-8	JUMPER WIRE		Belt	Amazon eBay
FS1000	Fuel Filter	1	Fuel filter	Amazon eBay $101.98 NAPA $30.67 KuduParts $95.00 FridayParts $96.50
LF9001	Lube Filter	1	Oil filter	Amazon eBay $78.82 NAPA $84.64 KuduParts $17.00
LFg9001	Valvoline® Premium Blue®		Oil filter	Amazon eBay
RU3220	Air Cleaner	1	Air filter	Amazon eBay $79.95
V70509	Lube Oil	4 Gal.	Fluid	Amazon eBay
WF2072	Coolant Filter	1	Coolant filter	Amazon eBay $20.95 NAPA $29.33
05200182	Flywheel ring gear sensor	1	Service part / kit	Amazon eBay
12000184	Rail pressure	1	Service part / kit	Amazon eBay
12000188	Freon compressor mounting location.	1	Service part / kit	Amazon eBay
19400716	Hard-Coupled		Service part / kit	Amazon eBay
19400734	Intermediate Speed Control		Service part / kit	Amazon eBay
19800802	Multiple Unit Synchronization		Service part / kit	Amazon eBay
3305070	Heater, 240V	1	Service part / kit	Amazon eBay
3315033	Heater, 120V	1	Service part / kit	Amazon eBay
3823494	Lubricating oil filter		Service part / kit	Amazon eBay
3885910	Red Paint, Spray can	1	Service part / kit	Amazon eBay
492000038	Operation and Maintenance Nanual		Service part / kit	Amazon eBay
49800897	Intermediate Speed Control		Service part / kit	Amazon eBay
49801587	Electronic Fan Clutch		Service part / kit	Amazon eBay
8210G4-12VDC	1" 12V solenoid	As needed	Service part / kit	Amazon eBay
8210G4-24VDC	1" 24V solenoid	As needed	Service part / kit	Amazon eBay
98200038	Engine Steam Cleaning		Service part / kit	Amazon eBay
A40-TB1-1	B+		Service part / kit	Amazon eBay
A40-TB1-11	(COMMON ALARM)		Service part / kit	Amazon eBay
A40-TB1-12	(B-)		Service part / kit	Amazon eBay
A40-TB1-30	COMMON ALARM		Service part / kit	Amazon eBay
A40-TB1-31	(COMMON ALARM)		Service part / kit	Amazon eBay
C2800	Fleetguard® refractometer	1	Service part / kit	Amazon eBay NAPA $393.59
CC2800	Fleetguard refractometer		Service part / kit	Amazon eBay
LE9o01	Cummins Engine Company, Inc.		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
Standby	100%	65.5	17.3

Available documents

Operator's manual — 960-0172 Cummins DQAD DQAE DQAF Operator's Manual (2-2004) (Cummins/Onan)Owner's manual — 960-0159 Cummins DQAD DQAE DQAF Operator's Manual (7-2010) (Cummins/Onan)Parts manual — 960-0217 Cummins DQAD DQAE DQAF Parts Manual (5-2001) (Cummins/Onan)Service manual — 960-0516B Cummins DQAD DQAE DQAF Service Manual (2-2004) (Cummins/Onan)Service manual — 960-0624 Cummins DGAD DGAE DGAF Installation Manual (5-2001) (Cummins/Onan)Service manual — 960-0632B Cummins DQAD DQAE DQAF Installation Manual (2-2004) (Cummins/Onan)

This page was generated from the 6 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

Cummins/Onan DQAD Generator Set

Service parts for the DQAD

Oil system

Specifications

Engine

Filters for the Cummins/Onan QSM11

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