Name: Cummins/Onan HDKAQ Generator Set
Brand: Cummins/Onan

Service parts for the HDKAQ

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

Air intake

1 required

F245-1001Air filtersee priceAmazon

Fuel system

1 required

F245-1002Fuel filtersee priceAmazon

Oil system

1 required

F245-1000Oil filtersee priceAmazon

Belts

1 required

F245-1004Beltsee priceAmazon

Cooling system

1 required

F245-1003Coolant filtersee priceAmazon

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

Specifications

Alternator	YK Series (4-pole)

Maintenance & consumables

Item	Spec	Part #
Air filter	Air Filter	F245-1001	Amazon eBay
Fuel filter	Fuel Filter	F245-1002	Amazon eBay
Oil filter	Oil Filter	F245-1000	Amazon eBay
Belt	Belt	F245-1004	Amazon eBay
Coolant filter	Coolant Filter	F245-1003	Amazon eBay

Service intervals

Item	Action	Hours	Months	Notes
Coolant Level	Check	8 hr		Keep level between COLD and HOT in recovery tank
Engine oil level	Check	8 hr
Fuel level	Check	8 hr
Generator set	Inspect	8 hr		Check for oil, fuel, cooling and exhaust system leaks; check exhaust audibly and visually with genset running (footnote 1)
Oil Level	Check	8 hr		Every Day / 8 Hr per Table 7-1
Air cleaner dust cap	Check	50 hr		Clean if required; also serviced at a second interval; perform more often in extremely dusty conditions (footnote 3)
Battery charging system	Check	50 hr
Spark arrester	Clean	50 hr		Clean out spark arrester
Air Cleaner Dust Boot	Clean	100 hr	1 mo	Perform more often in dusty conditions (footnote 5)
Air cleaner element	Clean	100 hr
Battery	Check	100 hr	1 mo	See battery manufacturer's recommendations (footnote 2)
Battery specific gravity	Check	100 hr
Drive belt tension	Check	100 hr		Visually check belts for evidence of slippage (footnote 4)
Crankcase oil and filter	Change	200 hr		First service — Change every 200 hours (footnote 7); perform after first 50 hours of operation on new genset (footnote 2)
Anti-freeze	Check	250 hr
Fuel filter element	Change	250 hr
Fuel filter water/sediment	Drain	250 hr		Drain one cup of fuel to remove water and sediment (footnote 5)
Fuel shut-off linkage	Check	250 hr
Generator assembly	Clean	250 hr
V-Belt Tension	Check	250 hr	6 mo	Check for slippage (footnote 3)
Water in Fuel	Drain	250 hr	6 mo	Drain about one cup to remove water and sediment (footnote 4)
Air Cleaner Element	Change	500 hr	12 mo	Perform more often in dusty conditions (footnote 5)
Cooling system	Clean	500 hr
Engine Oil and Oil Filter	Change	500 hr	12 mo	First service — Perform more often in dusty conditions (footnote 5)
Fuel Filter	Change	500 hr	12 mo	Perform every 250 hours when using B20 Bio-diesel fuel (footnote 7)
Generator brushes	Check	500 hr		To be performed by authorized service technician (footnote 6)
Valve Lash	Adjust	500 hr	12 mo	Must be performed by an authorized Cummins dealer (footnote 6)
Valve clearance	Check	500 hr		To be performed by authorized service technician (footnote 6)
Coolant	Change		24 mo	Every 2 Years
Generator Bearing	Replace		60 mo	Every 5 years; bearing grease deteriorates due to oxidation. Inspect for outer case rotation every 1000 hours. Must be performed by an authorized Cummins dealer (footnote 6)
Pressure Cap	Replace		60 mo	Every 5 years
Slip Rings and Brushes	Inspect		6 mo	Generator set should be inspected for brush wear and cleaning every six months

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 system distance from combustible material	3	in
Clearance	Minimum clearance between genset and compartment insulation	1	in
Clearance	Minimum space between engine exhaust components and compartment insulation	3	in
Clearance	V-belt deflection at 20 pounds (10 kg) applied to middle of pulley span	0.4 inch (10 mm)	inch	at 20 lbs (10 kg)
Other	Battery compartment ventilation opening	1.7	in2	minimum at top and bottom
Other	Battery compartment ventilation opening	11	cm2	minimum at top and bottom
Other	Battery electrolyte specific gravity (fully charged)	1.260		at approximately 80°F (27°C)
Other	Battery rating	425	CCA
Other	Battery rating	625	CCA	below 32°F (0°C)
Other	Battery specific gravity charge threshold	1.215		charge battery if specific gravity is less than this
Other	Bore	2.99 (76) for HDKAL/HDKAQ; 2.83 (72) for HDKAR/HDKAS	in (mm)
Other	Bore	72	mm
Other	Bore	76	mm
Other	Circuit breaker rating	35	A	2 pole, 60 Hz
Other	Compartment depth	25	in
Other	Compartment height	25	in
Other	Compartment width	38.4	in
Other	Compression ratio	23 to 1
Other	Cooling air requirement - Generator Inlet	100	in2
Other	Cooling air requirement - Radiator	200	in2
Other	Cooling system capacity	4.73	L
Other	Cranking time that triggers fault	35	seconds	cranking time exceeded fault (4 blinks)
Other	Cyclic horizontal forces	±500	lbs	±1 g-force
Other	Cyclic vertical forces	±1500	lbs	±3 g-force
Other	Displacement	1001	cm3
Other	Displacement	898	cm3
Other	Electrolyte specific gravity, fully charged battery	about 1.260	specific gravity	at 80 F (27 C)
Other	Engine power (max) at 1800 r/min	11.9	bhp	at 1800 r/min
Other	Engine power (max) at 1800 r/min	13.1	bhp	at 1800 r/min
Other	Engine power (max) at 1800 r/min	13.1 bhp HDKAL/HDKAQ; 11.9 bhp HDKAR/HDKAS	bhp	at 1800 r/min
Other	Fan belt tension	22 pounds (10 kg) finger pressure deflects belt about 0.4 inch (10 mm)	in (mm)	at middle of belt
Other	Ideal 60 Hz output voltage setting	120 VAC at 60-61 hz	VAC	measured at the power input of the application
Other	Lube oil capacity	4.25	L	including filter
Other	Maximum cranking time per attempt	30	seconds	allow two minutes cooling before next attempt
Other	Preheat time	10 to 20	seconds	depends on ambient temperature; max 20 seconds
Other	Sound level	78	dB(a)	@ 3 m rated load
Other	Starter current draw	100 to 150	A	at 72°F (22°C)
Other	Starter inrush current	300 to 400	A
Other	Stroke	73.6	mm
Other	Tailpipe extension beyond vehicle perimeter	1	in	minimum
Other	Tailpipe size	1-1/2	in I.D.	18 gauge rigid steel tubing
Pressure	Control Power Latch Switch S6 closes	5 psi (34 kPa)	psi
Pressure	Engine oil pressure	40 to 60	psi (276 to 414 kPa)	engine at operating temperature
Pressure	Low Oil Pressure Switch S1 closes	9 psi (62 kPa)	psi
Pressure	Maximum allowable exhaust back pressure	2	in Hg	at exhaust manifold
Pressure	Oil pressure meter range (optional)	0 to 100	psi (0 to 700 kPa)
Pressure	Oil pressure switch actuation (low oil pressure shutdown)	7	psi (49 kPa)	pressure drops below
Resistance	A053U842 (7.5 kw) Main winding T1-Gnd	.23	ohms	10% at 25 C (77 F)
Resistance	A053U842 (7.5 kw) Main winding T1-T2	.43	ohms	10% at 25 C (77 F)
Resistance	A053U842 (7.5 kw) Main winding T2-Gnd	.22	ohms	10% at 25 C (77 F)
Resistance	A053U842 (7.5 kw) Quad winding Q1-Q2	1.3	ohms	10% at 25 C (77 F)
Resistance	A053U842 (7.5 kw) Rotor resistance	18.5	ohms	10% at 25 C (77 F)
Resistance	Rotor insulation resistance to shaft (minimum)	100,000	ohms	test with 500 VDC or more
Resistance	Rotor resistance F1-F2 (50 Hz)	20.7	ohms	10% at 25 C
Resistance	Rotor resistance F1-F2 (60 Hz)	18.2	ohms	10% at 25 C
Resistance	Stator resistance 50 Hz single-phase Q1-Q50	2.322	ohms	10% at 25 C
Resistance	Stator resistance 50 Hz single-phase T1-T2, T3-T4	0.227	ohm	10% at 25 C
Resistance	Stator resistance 50 Hz three-phase Q2-T11	0.365	ohm	10% at 25 C
Resistance	Stator resistance 50 Hz three-phase T1-T4, T2-T5, T3-T6, T7-T10, T8-T11, T9-T12	0.703	ohm	10% at 25 C
Resistance	Stator resistance 60 Hz single-phase (100/200 volts only) Q1-Q60	2.3	ohms	10% at 25 C

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	50/50 mixture of ethylene glycol antifreeze and water	Reliable brand of antifreeze containing a rust and corrosion inhibitor; must not contain a stop-leak additive	above -37°C	4.73 L (1.25 gal)	A 50/50 mixture provides freeze protection to -34°F (-37°C). Do not exceed 50/50. Use clean, low-mineral, non-corrosive water; distilled or soft water preferred.
Coolant	50/50 mixture of water and ethylene glycol		above -37°C		Best quality ethylene or propylene glycol antifreeze fully formulated with rust inhibitors and coolant stabilizers, but not stop-leak additives. Use fresh water low in minerals; distilled water is best. Shipped 50/50 mixture good for -34 F (-37 C).
Engine oil	SAE viscosity per anticipated ambient temperature (Table 1, Oil Viscosity vs. Temperature)	API classification CC and later		4.26 liters (4.5 quarts)	Do not use synthetic oil or non-detergent oil. Do not mix different brands of oil. (Specifications section lists lube oil capacity 4.5 qt (4.25 L) including filter.)
Fuel		ASTM D975 (petroleum diesel); ASTM D7467 (B5-B20 blend); ASTM D6751 or EN14214 (bio-diesel component)			B5 bio-diesel suitable. Up to B20 requires: HDKAL at Spec G or higher, vehicle engine B20-capable, OEM-installed B20-compatible fuel line and water separator. Blend properties change below 23 F (-5 C). Purge with pure ASTM D975 diesel for min 30 minutes before storage >90 days.
Fuel	ASTM 1-D (No. 1 Diesel)	minimum Cetane number 45	below 0°C		Use when ambient temperatures are below 32°F (0°C) and during long periods of light engine load.
Fuel	ASTM 2-D (No. 2 Diesel)	minimum Cetane number 45			Number 2 diesel fuel gives best economy and performance under most conditions.
Fuel	ASTM 2-D (No. 2 Diesel) or ASTM 1-D (No. 1 Diesel)	Minimum Cetane number of 45; low sulfur content with cloud point at least 10 degrees below lowest expected fuel temperature			Use No. 1 diesel below 32°F (0°C) and during long periods of light load. At temperatures lower than 14°F (-10°C) or altitude above 5000 feet (1500 m) use No. 1 diesel with a cetane rating of at least 40. Shorten oil change interval by half if fuel sulfur content is higher than 0.5%.
Grease	moly grease only				Regrease O-ring with moly grease only. Renew generator bearing grease if necessary (moly only).

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
1	High Engine Coolant Temperature	One blink indicates shutdown due to high engine coolant temperature.	Shutdown	Check the engine cooling system and coolant level.
1, 2, 3, 4	First level faults	First-level faults; avoid interpreting as second-level codes 11, 22, 33, or 44	Shutdown	Pay close attention to the pause sequence
11		Second-level shutdown code No. 11 (blink once, pause, blink once). Not assigned a first-level fault (avoid confusion with first-level Code 1).
2	Loss of Engine Oil Pressure	Two blinks indicate shutdown due to a loss of engine oil pressure.	Shutdown	Check engine oil level and lubrication system.
22		Second-level shutdown code No. 22. Not assigned a first-level fault (avoid confusion with first-level Code 2).
3	Service Fault	Three blinks indicate a service fault. Press Stop once to cause the two-digit, second-level shutdown code to blink.	Warning	Press Stop once to blink the two-digit shutdown code (tens digit, pause, units digit). Press Stop again to stop the blinking.
33		Code 33 has not been assigned a fault to avoid misinterpreting first-level Code 3.
4	Cranking Time Exceeded	Four blinks indicate that cranking time exceeded 35 seconds.	Shutdown	Check starting system and fuel supply.
4 blinks	Cranking time exceeded 35 seconds	Status indicator light repeatedly blinks four times	Shutdown	Check fuel supply and priming before re-cranking
44		Code 44 has not been assigned a fault to avoid misinterpreting first-level Code 4.
restore	Restoring fault code blinking	Fault code stops blinking after five minutes	Info	Press Stop three times within three seconds to restore fault code blinking

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

Procedures

Adjusting V-Belt Tension adjustment

⚠ Disconnect negative cable(s) at the battery(ies) to prevent the engine from starting.

Tools: Belt tension gauge / weights

Disconnect the negative (-) cable(s) at the battery(ies) and remove the top belt guard.
Loosen the alternator pivot bolt first and then the adjusting bracket bolt on top.
Tighten belt tension by pivoting the alternator outwards; hold tension by tightening the adjusting bracket bolt.
Apply 20 pounds (10 kg) to the middle of the pulley span and measure belt deflection, which should be 0.4 inch (10 mm).
Tighten the alternator bolts when tension is correct.
Secure the belt guard and reconnect the battery cables (negative [-] last).

Fan Belt Adjustment adjustment

⚠ Do not operate the genset without the belt guard in place.

⚠ Accidental starting can cause severe personal injury or death; disconnect the starting battery cables.

Remove the generator set starting battery cables, negative (-) cable first.
Remove the belt guard from the front of the set.
Loosen the bolt that passes through the long slot in the alternator mounting bracket.
Slide the alternator until the belt tension is correct.

Voltage Adjustment [G] adjustment

⚠ Disconnect both battery cables, negative (-) cable first, when repairs are made.

⚠ Contact with high voltage can cause severe personal injury or death.

Tools: Voltmeter, Flat-blade screwdriver

Attach a voltmeter securely to the L1 and L2 leads.
Start the generator set and place a typical load on its output.
Use a flat-blade screwdriver to set the voltage adjust potentiometer for correct voltage.
For most 60 Hz applications, the ideal setting is 120 VAC at 60-61 hz.
Retighten the locking nut when complete.

Dynamic Rotor/Stator Test [D] diagnostic

⚠ Electrical shock can cause severe personal injury or death; do not touch electrical wiring or components during testing.

Tools: Voltmeter, Jumper leads, 12-volt battery

Stop the generator set.
Unplug the voltage regulator from the wiring harness.
Using jumpers, connect a 12-volt battery to the F1/F2 terminals.
Start the generator set and measure outputs at J4-4 - J4-6, L1 - L2, L1 - L0, L2 - L0, Q60 - Q1 (Q50-Q1 for 50 Hz), and S1 - S2.
Compare readings: J4-4 - J4-6: 75 VAC 20; L1 - L2: 147 VAC 20; L1 - L0: 74 VAC 20; L2 - L0: 74 VAC 20; Q60 - Q1: 111 VAC 20; Q50 - Q1: 99 VAC 20; S1 - S2: 75 VAC 20.
If these voltages are measured, the generator set is operating correctly and the problem is elsewhere.

Fuel Solenoid Check (K14) diagnostic

Watch for solenoid actuation when B+ is applied (start switch in start or run position).
If there is no actuation when B+ is applied, the fuel solenoid must be replaced.
When B+ is removed, the solenoid must de-activate.

Heater (Glow Plug) Relay Check (K13) diagnostic

Tools: Voltmeter, Jumper leads

Connect the relay coil voltage across the relay coil terminals; the relay should activate if coil is okay.
Connect a voltage source to one side of relay contacts.
Connect a voltmeter to other side of relay contact and voltage source.
If voltage appears when relay energizes, the contact is good.

Power Relay Check (A11-K12) diagnostic

Tools: Continuity tester, Jumper leads

Unplug CB12-2A from the circuit breaker, noting wire markings to select the correct one.
Locate S6 (oil pressure switch) and find the grounded side using a continuity tester.
Use a jumper to ground the non-grounded side of S6.
Use a second jumper from B+ on the control board to apply B+ to the SW B+ terminal; fuel pump E5 should start and run.
Remove the B+ jumper. If the fuel pump continues to run, K12 is good; if it stops, replace the A11 control board.
Push the generator set STOP button.
Remove the jumpers and reconnect CB12-2A.

Start Solenoid Check (K11) diagnostic

Tools: Jumper leads, Voltmeter

Apply battery positive (B+) to the terminal marked S.
Connect a ground wire to the solenoid terminal marked I. The solenoid should activate.
If contacts are good, battery voltage should be read between terminal 1 and ground.
Voltage drop across the contacts should never exceed one volt in circuit application.

Start/Stop Switch Check (S11) diagnostic

Tools: Ohmmeter

Remove battery B+ cable.
Place ohmmeter leads across switch.
Open and close switch while observing the ohmmeter. A normally open (NO) switch should indicate infinite resistance when open and continuity when closed.
A normally closed (NC) switch should indicate continuity when closed and infinite resistance when open.
Replace switch if defective.

Testing Field Voltage [A] diagnostic

⚠ Disconnect starting battery negative (-) cable before handling electrical wiring or components.

Tools: DC voltmeter

Test field voltage at the brush holder terminals with a DC voltmeter.
Field voltage should fall between 18 and 60 volts.
Test at no load and at full load.

Testing Generator Rotor [B] diagnostic

Tools: Megger or insulation resistance meter (500 VDC or more), Digital ohmmeter

Isolate the rotor windings by disconnecting the two leads to the brush holder.
Testing for grounds: connect test leads between each ring and the rotor shaft in turn; meter should register 100,000 ohms or greater.
If less than 100,000 ohms, thoroughly dry the rotor and retest; replace a grounded rotor with a new identical part.
Testing for open/shorted windings: check resistance between F1 and F2 slip rings with an ohmmeter.
Rotor resistance 60 Hz is 18.2 ohms; 50 Hz is 20.7 ohms (10% at 25 C).
If there is a large difference, replace the defective rotor with a new, identical part.

Testing Generator Stator [C] diagnostic

Tools: Megger or insulation resistance meter, Wheatstone Bridge

Isolate the stator windings by disconnecting all six stator leads.
Test for open circuits between T1-T2, T3-T4 and Q1-Q2.
Test for grounded circuits between T1, T3 and B1 and the stator laminations or other unpainted grounding point.
Use a megger or insulation resistance meter (not more than 500 VDC); a reading less than 100,000 ohms indicates a questionable stator.
Test for continuity between coil leads; all pairs should have equal resistance.
If a winding is shorted, open or grounded, replace the stator assembly; check leads for broken wires or insulation first.

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
	single	Quadrature power connection Q60 - 60 Hz, Q50 - 50 Hz units	Q1, Q50, Q60	Note 2: Quadrature power connection Q60-60 Hz, Q50-50 Hz units. Note 3: AVR reference voltage. Note 1: From J2-15 for field flashing.
100	single-phase			50 Hz; see reconnection chart
100/200	single	As shown	T1, T2, T3, T4; L0(N), L1	100/200 volts only; stator resistance values differ (T1-T2, T3-T4: 0.150 ohm; Q1-Q60: 2.3 ohms)
100/200	single-phase			50 Hz; see reconnection chart
110/220	single	As shown (60 Hz)	T1, T2, T3, T4; L0(N), L1, L2	60 Hz
110/220	single	See reconnection chart (50 Hz)	T1, T2, T3, T4; L0, L1	50 Hz
110/220	single-phase	as shown
115/230	single	As shown (60 Hz)	T1, T2, T3, T4; L0(N), L1, L2	60 Hz wiring diagram 612-6637 / 612-6742
115/230	single	See reconnection chart (50 Hz)	T1, T2, T3, T4; L0, L1	50 Hz
115/230	single-phase	as shown
120	single-phase			60 Hz; see reconnection chart
120/240	single	As shown (60 Hz)	T1, T2, T3, T4; L0(N), L1, L2	60 Hz; 110/220 V, 115/230 V & 120/240 V as shown; see reconnection chart for other voltages
120/240	single	See reconnection chart (50 Hz)	T1, T2, T3, T4; L0, L1	50 Hz; 110/220 V, 115/230 V & 120/240 V as shown; see reconnection chart for other voltages
120/240	single-phase			60 Hz; see reconnection chart
200	single-phase			50 Hz; see reconnection chart
240	single-phase			60 Hz; see reconnection chart

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 alternator does the Cummins/Onan HDKAQ use?

The Cummins/Onan HDKAQ uses a YK Series alternator. It has 4 poles.

What oil filter does the Cummins/Onan HDKAQ use?

The Cummins/Onan HDKAQ uses oil filter part number F245-1000.

What fuel filter does the Cummins/Onan HDKAQ use?

The Cummins/Onan HDKAQ uses fuel filter part number F245-1002.

What air filter fits the Cummins/Onan HDKAQ?

The Cummins/Onan HDKAQ uses air filter part number F245-1001.

Troubleshooting

Symptoms & remedies

Symptom	Cause	Remedy
NO AC OUTPUT VOLTAGE AT RATED ENGINE RPM	Load circuit breakers closed, overload in the load circuit, open circuit between brush block and voltage regulator, brushes stuck or not making good contact with slip rings, opens or grounds in rotor or stator, incorrect field voltage, wrong connections of F1 and F2 leads	Locate cause of overload and correct as required. Reset breaker, or replace if bad. Check continuity of circuit breakers and replace if necessary. Is circuit open between brush block and voltage regulator? Check for continuity and correct if circuit is open. Are brushes stuck in holder or not making good contact with slip rings? Release brushes if jammed in holder. Clean slip rings if dirty. Test continuity of rotor, stator per Tests [B], [C]. Are there opens or grounds? Replace component if defective. Test field voltage per TEST [A]. Is there correct field voltage? Examine brush block connections. Are F1 and F2 leads installed on correct terminals? Perform TEST [D]. Connect brush leads to correct terminals.
UNSTABLE OUTPUT VOLTAGE, ENGINE SPEED STABLE	Broken wires or loose connections on voltage regulator assembly, brushes not OK	Are there any broken wires or loose connections on voltage regulator assembly? Check wiring harness from regulator assembly to end bell per TEST [F]. Check OK? Repair as required. Inspect brushes per procedure in Manual Section 4. Brushes OK? Repair wiring or replace as required.
Engine does not crank.		Is battery dead? Check CB11 circuit breaker. If okay, jumper battery cable B+ connection to B1 starter so- lenoid terminal. Does engine crank? With S11 in Start position, is battery voltage present between K11 terminal S and ground? If K11 does not energize, test per Checkout [D] and replace if bad. Is battery voltage present at B1 solenoid terminal with S11 in Start position? Check battery per Checkout [A] and recharge or replace. Check battery charger operation per Checkout [C]. Check battery cables for clean tight connections (ref. Checkout [B]). Check B1 starter so- lidoid and motor: if bad, repair or replace. Check B+ wiring to S11, and between S11 and K11. Check NC contacts of A11-K15. Replace if bad.
Unbalanced generator set output voltage		Remove load at generator set terminals. Are generator set leads connected and grounded properly? See Test [C]. Is generator set stator winding continuous per TEST [C]? Check load for ground faults and correct as necessary. Check for correct grounding of generator set and load. Correct as necessary. Replace stator assembly.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

Part #	Description	Qty	System
185-2284	Gasket * −Parts Included in Control Plate Assy.	1	Gasket	Amazon eBay
185-2291	Gasket	3	Gasket	Amazon eBay
185-2338	*Gasket	1	Gasket	Amazon eBay
185-2411	*Cap, Sealing	1	Seal	Amazon eBay
185-2413	*Cap, Sealing	2	Seal	Amazon eBay
185-2461	Seal (Part 185-2461)	1	Seal	Amazon eBay $8.99
185-2578	Gasket	1	Gasket	Amazon eBay
185-2884	Gasket	1	Gasket	Amazon eBay
185-5337	Gasket	3	Gasket	Amazon eBay
185-5407	Cover, Oil Fill	1	Fluid	Amazon eBay
185-5458	Thermostat	1	Thermostat	Amazon eBay
185-5641	Gasket, Delivery Valve	3	Gasket	Amazon eBay
185-5661	Gasket	2	Gasket	Amazon eBay
185-5663	Gasket	1	Gasket	Amazon eBay
185-5714	*Seal Assy, Mechanical	1	Seal	Amazon eBay
185-5745	Bolt * −Parts Included in Water Pump Assy.	2	Pump	Amazon eBay
185-5820	Gasket	1	Gasket	Amazon eBay
185-5835	Filter, Oil	1	Oil filter	Amazon $33.27 eBay $21.78 FridayParts $20.19
185-5985	Seal, Heat	3	Seal	Amazon eBay
185-6485	*Rotor, Oil Pump	1	Pump	Amazon eBay
185-6486	*Cover, Oil Pump	1	Pump	Amazon eBay
185-6503	Shield, Breather Oil	1	Fluid	Amazon eBay
185-6510	Seal (Part 185-6510)	1	Seal	Amazon eBay
185-6511	Gasket, Bearing Case Cover	1	Gasket	Amazon eBay
185-6542	*Gear, Oil Pump Drive	1	Pump	Amazon eBay
185-6558	Gear, Injection Pump	1	Pump	Amazon eBay
185-6580	Gasket, Fuel Pump	1	Pump	Amazon eBay
185-6603	Gasket	1	Gasket	Amazon eBay
185-6671	Pump Assy, Water (Includes Parts Marked *)	1	Pump	Amazon eBay $145.00 FridayParts $42.60
185-6672	*Flange, Pump Water	1	Pump	Amazon eBay
185-6674	*Impeller, Pump Water	1	Pump	Amazon eBay
185-6845	Shim, Injection Pump	2	Pump	Amazon eBay
185-6863	Gasket, Gearcase	1	Gasket	Amazon eBay
185-6864	Seal, Oil	1	Seal	Amazon eBay
185-6868	Gasket, Cylinder Head Cover	1	Gasket	Amazon eBay
185-6882	Pump Assy, Injection (See Separate Page for Components)	1	Pump	Amazon eBay
185-6884	Plunger, Pump	3	Pump	Amazon eBay
185-6894	Gasket	1	Gasket	Amazon eBay
185-6899	Cord, Glow Plug	1	Glow plug	Amazon eBay
185-6922	Gasket, Water Flange	1	Gasket	Amazon eBay
185-6935	Cover, Thermostat	1	Thermostat	Amazon eBay
185-7242	Gasket Thermostat	1	Gasket	Amazon eBay
185-7299	Gasket, Water Pump	1	Pump	Amazon eBay
185-7300	Seal, Valve Stem	6	Seal	Amazon eBay
185-7313	Gasket * −Parts Included in Governor Lever Assy.	1	Gasket	Amazon eBay
193-0244	Sender, Pressure - 0i1	1	Sensor	Amazon eBay
193-0318	Sender, Water Temperature	1	Sensor	Amazon $58.99 eBay $73.95
503-2708	Clamp, Hose	1	Hose	Amazon eBay
503-2709	Clamp, Hose	1	Hose	Amazon eBay
ES1676	BRUSH BLOCK ASSEMBLY	1	Brush block assembly	Amazon eBay
F245-1000	Oil Filter	1	Oil filter	Amazon eBay
F245-1001	Air Filter	1	Air filter	Amazon eBay
F245-1002	Fuel Filter	1	Fuel filter	Amazon eBay
F245-1003	Coolant Filter	1	Coolant filter	Amazon eBay
F245-1004	Belt	1	Belt	Amazon eBay
F245-1005	Battery	1	Battery	Amazon eBay
F245-1006	Spark Plug	1	Spark plug	Amazon eBay
185-2412	Cap, Sealing	1	Service part / kit	Amazon eBay
185-5484	Cap, Sealing	6	Service part / kit	Amazon eBay
185-6500	Plate, Lower Breather Element	1	Service part / kit	Amazon eBay
185-6501	Plate, Upper Breather Element	1	Service part / kit	Amazon eBay
185-6721	Breather Filter Element	1	Service part / kit	Amazon eBay
185-6874	Crankshaft	1	Service part / kit	Amazon eBay
185-7092	Cylinder Block Assy	1	Service part / kit	Amazon eBay
333-0594	Heater, Engine * −Parts Included in Cylinder Block Assy.	1	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.

Available documents

Owner's manual — HDKAL, HDKAQ, HDKAR, HDKAS Operators Manual (Cummins/Onan)Parts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Service manual — 981-0612 Onan HDKAL HDKAQ HDKAR RV Genset Installation manual (10-1997) (Cummins/Onan)Service manual — HDKAL, HDKAQ, HDKAR, HDKAS Service Manual (Cummins/Onan)