HomeCummins/OnanCummins/Onan HDKA

Cummins/Onan HDKA Generator Set

The Cummins/Onan HDKA is a 6 kW (6 kVA) diesel standby generator set powered by a Cummins/Onan HDKAL engine. It is available at , 1-phase, 60 Hz and rated 50 A. It holds about 2.6 L (0.7 gal) of oil and 4 L (1.1 gal) of coolant, with a maximum ambient rating of 120 °C. Starting uses 1 battery rated 450 CCA at 12 V. The set measures 922×599×566 mm (36.3×23.6×22.3 in), weighs about 191 kg (421 lb) and produces 76 dBA at 3 m.

6 kW
Standby
1.001 L
Displacement
2.6 L
Oil capacity
7
Document types

How to read your Cummins/Onan serial & model number →

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power6 kW
Standby kVA6
Prime power6 kW
ControllerDC Controls - 12-Volt System, EC-AGS+, Generator, Integrated Microprocessor Based Engine
Oil capacity2.6 L
Voltage options120 V
Phase1
Rated current50 A
Power factor1.0
Circuit breaker30 A
Battery cranking[450, 650] CCA
Battery voltage12 V
Battery quantity1
Coolant capacity4 L
Max ambient120 °C
Dimensions (L×W×H)922×599×566 mm
Dry weight191 kg
Sound level78.0 dBA @ 3 m

Engine

Cummins/Onan HDKAL
Oil capacity4.5 L
Coolant capacity4.73 L
Displacement1.001 L
AspirationLiquid-cooled
Rated speed1800 rpm

Maintenance & consumables

for the Cummins/Onan HDKAL
ItemSpecCapacityPart #Interval
Air filter1000 hr find
Fuel filter149-251350 hr Amazon eBay $36.95
Oil filterW21ESO1600250 hr buy
Belt511-02351000 hr Amazon eBay $10.00
Coolant50/50 ethylene glycol mix4.73 L8760 hr
Coolant filter50 hr find
OilAPI SF/CD5.1 L250 hr

Compatible filters for the Cummins/Onan HDKAL — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Air filter: Kubota 7000014656 Kubota 1576311081 Donaldson P181050 Donaldson P181052 Ac Delco PC138K

Common questions

What is the power rating of the Cummins/Onan HDKA?

The Cummins/Onan HDKA is rated 6 kW standby (6.0 kVA).

What engine does the Cummins/Onan HDKA use?

The Cummins/Onan HDKA is powered by the Cummins/Onan HDKAL engine.

What fuel does the Cummins/Onan HDKA use?

The Cummins/Onan HDKA runs on diesel.

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

The Cummins/Onan HDKAL engine in the Cummins/Onan HDKA has an oil capacity of 4.5 liters.

Troubleshooting

25

Fault codes

CodeMeaning
Fault Code BlinkingRestoring Fault Code Blinking
Code 1Engine Over Temperature
Code 2Low Oil Pressure
Code 3Service Check
Code 4Over Crank
Code 12Over Voltage
Code 13Under Voltage
Code 14Over Frequency
Code 15Under Frequency
Code 19Governor Actuator
Code 22Governor Actuator Overload
Code 27Voltage Sense

Symptoms & remedies

SymptomCauseRemedy
DizzinessIF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist, seek medical attention. Shut down the unit and do not operate until it has been inspected and repaired.
Muscular TwitchingIF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist, seek medical attention. Shut down the unit and do not operate until it has been inspected and repaired.
VomitingIF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist, seek medical attention. Shut down the unit and do not operate until it has been inspected and repaired.
Weakness and SleepinessIF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist, seek medical attention. Shut down the unit and do not operate until it has been inspected and repaired.
Inability to Think CoherentlyIF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist, seek medical attention. Shut down the unit and do not operate until it has been inspected and repaired.
Engine exhaust could ignite grass or brushParked in high grass or brush
NO AC OUTPUT VOLTAGE AT RATED ENGINE RPMLoad circuit breakers closed, circuit open between brush block and voltage regulator, brushes stuck in holder or not making good contact with slip rings, opens or grounds in rotor or stator, incorrect field voltage, F1 and F2 leads installed on wrong terminalsLocate cause of overload and correct as required. Reset breaker, or replace if bad. Check continuity of circuit breakers and replace if necessary. Check for continuity and correct if circuit is open. Release brushes if jammed in holder. Clean slip rings if dirty. Test rotor, stator per Tests [B], [C]. Replace component if defective. Test field voltage per TEST [A]. Connect brush leads to correct terminals. Set RPM per instructions in appropriate engine manual. Set control per Voltage Adjustment [G]. See TEST [H]. Perform procedure [D] and replace voltage regulator if necessary.
OUTPUT VOLTAGE TOO HIGH OR TOO LOWSet AC output overloaded, broken wires or loose connections on voltage regulator assembly, brushes not OKRemove part of the set load. Check wiring harness from regulator assembly to end bell per TEST [F]. Inspect brushes per procedure in Manual Section 4. Repair as required. Replace the voltage regulator per procedure [E] if necessary.
UNSTABLE OUTPUT VOLTAGE, ENGINE SPEED STABLEBroken wires or loose connections on voltage regulator assembly, brushes not OKCheck wiring harness from regulator assembly to end bell per TEST [F]. Inspect brushes per procedure in Manual Section 4. Repair as required.
UNBALANCED GENERATOR OUTPUT VOLTAGEGenerator leads not connected and grounded properly, generator stator winding not continuousRemove load at generator terminals. Check if generator leads are connected and grounded properly per TEST [C]. Test generator stator winding continuity.
Engine does not crank.Is battery dead? Check CB11 circuit breaker. If okay, jumper battery cable B+ connection to B1 starter so 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 solenoid 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.
Engine cranks but does not startIncorrect fuel? See Operator’s Manual recommendations. Check fuel system: fuel tank level, shut-off valves, fuel lines and connections, fuel filters, fuel pump and injection pump. Okay? Does K14 fuel solenoid energize when S11 is in Start position?Check B+ circuit through S11. Test S11 per Checkout [G]. Test K14 per Checkout [F]. Check switch S11 per Checkout [G]. Check heater relay per Checkout [E]. Check heater wiring.
Engine starts but stops after running several secondsIs a fault condition indicated by fault breaker CB12 on control panel? Check for a possible fault condition. If none, check fault monitors S1 through S4 and fault breaker CB12 for improper wiring. Check relay K12 per Checkout [H]. Is K12 good? Does DC control breaker trip after generator set is started?Check for closing of S6 power latch switch. If switch is OK, check mechanical adjustment of K1 solenoid: is rod adjusted to correct length to allow the hold-in coil of K1 to latch? If K1 adjustment is OK and problem remains, replace engine monitor PC board. Check all B+ wiring for shorts to ground. Check fuel solenoid adjustment.

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

Parts

204
Part #DescriptionQtySystem
0611-1236FC32 TS Wiring Diagram1Wiring diagram buy
122-0833Filter, Oil1Oil filter Amazon eBay $25.95
14-028Oil Filter1Oil filter buy
14-029Spark Plug1Spark plug FridayParts $33.99
14-035Air Cleaner Element1Air filter buy
14-036Fuel Filter1Fuel filter buy
140-2897Element, Air Filter1Air filter Amazon eBay $22.95
147-0860Filter, Fuel for HDKAK and HDKAH (Beginning Spec N)1Fuel filter Amazon eBay $23.74
149-2513Filter, Fuel for HDKAK and HDKAH (Spec A-K)1Fuel filter Amazon eBay $36.95
149-2790Pump, Fuel1Pump FridayParts $24.89
185-2095O'Ring1Seal buy
185-2284Gasket * −Parts Included in Control Plate Assy.2Gasket buy
185-2291Gasket3Gasket buy
185-2338*Gasket1Gasket buy
185-2411Cap, Seal1Seal buy
185-2412Cap, Sealing1Seal buy
185-2413Cap, Sealing2Seal buy
185-2461*Seal, Oil1Seal buy
185-2578Gasket1Gasket buy
185-2884Gasket1Gasket buy
185-5337Gasket3Gasket buy
185-5407Cover, Oil Fill1Fluid buy
185-5433Pump, Water1Pump yemparts $61.06
185-5458Thermostat1Thermostat buy
185-5484Cap, Sealing4Seal buy
185-5641Gasket, Delivery Valve3Gasket buy
185-5661Gasket2Gasket buy
185-5663Gasket1Gasket buy
185-5714*Seal Assy, Mechanical1Seal buy
185-5715Impeller1Impeller buy
185-5745Bolt * −Parts Included in Water Pump Assy.2Pump buy
185-5820Gasket1Gasket buy
185-5835Filter, Oil * −Parts Included in Gearcase Assy.1Oil filter Amazon eBay $21.32
185-5985Seal, Heat3Seal buy
185-6120Gasket, Cylinder Head1Gasket buy
185-6485*Rotor, Oil Pump1Pump buy
185-6486*Cover, Oil Pump1Pump buy
185-6503Shield, Breather Oil1Fluid buy
185-6510Seal, Oil1Seal buy
185-6511Gasket, Bearing Case Cover1Gasket buy
185-6542Gear, Oil Pump Drive1Pump buy
185-6545O'Ring1Seal buy
185-6558Gear, Injection Pump1Pump buy
185-6580Gasket, Fuel Pump1Pump buy
185-6603Gasket1Gasket buy
185-6671Pump Assy, Water (Includes Parts Marked *)1Pump yemparts $95.28
185-6672*Flange, Pump Water1Pump buy
185-6674*Impeller, Pump Water1Pump buy
185-6845Shim, Injection Pump2Pump buy
185-6863Gasket, Gearcase1Gasket buy
185-6864Seal, Oil1Seal buy
185-6866Indicator, Oil Level1Sensor buy
185-6868Gasket, Head Cover1Gasket buy
185-6882Pump Assy, Injection (See Separate Page for Components)1Pump buy
185-6884Plunger, Pump3Pump buy
185-6894Gasket1Gasket buy
185-6899Cord, Glow Plug1Glow plug buy
185-6922Gasket, Water Flange1Gasket buy
185-6935Cover, Thermostat1Thermostat buy
185-7242Gasket Thermostat1Gasket buy
185-7299Gasket, Water Pump1Pump buy
185-7300Seal, Valve Stem6Seal buy
185-7313Gasket * −Parts Included in Governor Lever Assy.1Gasket buy
185-7427Indicator, Oil Level (Exhaust Side)1Sensor buy
185-7428Indicator, Oil Level (Intake Side)1Sensor buy
185-7429O'Ring1Seal buy
191-2229Starter1Starter buy
193-0244Sender, Oil Pressure (E1)1Sensor buy
193-0318Sender, Water Temperature (E2)1Sensor buy
309-0641-05Switch, Pressure (S1)1Sensor buy
309-0641-18Switch, Pressure (S6)1Sensor buy
337-3782Plug, Glow3Glow plug buy
503-2708Clamp, Hose1Hose buy
503-2709Clamp, Hose1Hose buy
511-0235Belt, Fan1Belt Amazon eBay $10.00
541-0530Installation of Auxiliary Fuel Pump Kit on Commercial HDKAJ, HDKAK Generator Set 1 (G300)Fuel pump buy
541-0531Installation of Remote Air Cleaner Kit on Commercial HDKAJ, HDKAK Generator Set 1 (G299)Air filter buy
A046Z961Thermostat1Thermostat buy
A11-K12Power relayPower relay buy
A11-K15Starter protection relayStarter protection relay buy
CS-1239Pressure CapPressure cap buy
ES1676BRUSH BLOCK ASSEMBLY1Brush block assembly buy
F245-1000Oil Filter1Oil filter buy
F245-1001Air Filter1Air filter buy
F245-1002Fuel Filter1Fuel filter buy
F245-1003Coolant Filter1Coolant filter buy
F245-1004Belt1Belt buy
F245-1005Battery1Battery buy
F245-1006Spark Plug1Spark plug buy
FS1842fuel hose fitting for fuel tank pickup line (to fuel pump)Hose buy
0908-0110Health and Safety ManualService part / kit buy
0981-0161Operator Manual for Commercial Mobile Generator SetService part / kit buy
104-1861Gear, Ring1Service part / kit buy
104-1916Flywheel Assy (Includes Ring Gear)1Service part / kit buy
105-0744Camshaft Assy1Service part / kit buy
185-2188Plug3Service part / kit buy
185-2233Plug2Service part / kit buy
185-2387Bolt2Service part / kit buy
185-2388Bolt3Service part / kit buy
185-5477Bolt, Flywheel (M10 x 1.25 x 30mm)6Service part / kit buy
185-5487Pin, Straight2Service part / kit buy
185-5490Cock, Drain1Service part / kit buy
185-5502Plug1Service part / kit buy
185-5558Screw, Set1Service part / kit buy
185-5560Key, Feather1Service part / kit buy
185-5843Pin, Straight2Service part / kit buy
185-5924Ball3Service part / kit buy
185-5938Washer, Thrust, Standard2Service part / kit buy
185-5939Washer, Thrust, .2mm Oversize2Service part / kit buy
185-5941Washer, Thrust, Standard2Service part / kit buy
185-5942Washer, Thrust, .2mm Oversize2Service part / kit buy
185-5943Washer, Thrust, .4mm Oversize2Service part / kit buy
185-6039Plug1Service part / kit buy
185-6040Plug1Service part / kit buy
185-6121Plug3Service part / kit buy
185-6468Plug3Service part / kit buy
185-6500Plate, Lower Breather Element1Service part / kit buy
185-6501Plate, Upper Breather Element1Service part / kit buy
185-6516Tappet6Service part / kit buy
185-6517Rod, Push6Service part / kit buy
185-6519Gear, Camshaft1Service part / kit buy
185-6520Stopper, Camshaft1Service part / kit buy
185-6521Gear Assy, Idle1Service part / kit buy
185-6522Bushing, Idle Gear1Service part / kit buy
185-6523Collar, Idle Gear1Service part / kit buy
185-6524Collar, Idle Gear1Service part / kit buy
185-6525Circlip, Idle Gear1Service part / kit buy
185-6526Shaft, Idle Gear1Service part / kit buy
185-6529Ring Assy, Piston, Standard3Service part / kit buy
185-6530Ring Assy, Piston, .5mm Oversize3Service part / kit buy
185-6531Pin, Piston3Service part / kit buy
185-6532Circlip, Piston Pin6Service part / kit buy
185-6533Rod Assy, Connecting3Service part / kit buy
185-6534Bushing, Connecting Rod3Service part / kit buy
185-6535Bolt, Connecting Rod6Service part / kit buy
185-6536Bearing, Connecting Rod, Standard3Service part / kit buy
185-6537Bearing, Connecting Rod, .2mm Undersize3Service part / kit buy
185-6538Bearing, Connecting Rod, .4mm Undersize3Service part / kit buy
185-6540Gear, Crankshaft1Service part / kit buy
185-6541Key1Service part / kit buy
185-6543Sleeve, Crankshaft1Service part / kit buy
185-6544Collar, Crankshaft1Service part / kit buy
185-6546Bearing, Crankshaft, Standard1Service part / kit buy
185-6547Bearing, Crankshaft, .2mm Undersize1Service part / kit buy
185-6548Bearing, Crankshaft, .4mm Undersize1Service part / kit buy
185-6549Bearing, Crankshaft, Standard2Service part / kit buy
185-6550Bearing, Crankshaft, .2mm Undersize2Service part / kit buy
185-6551Bearing, Crankshaft, .4mm Undersize2Service part / kit buy
185-6552Bearing, Crankshaft, Standard1Service part / kit buy
185-6553Bearing, Crankshaft, .2mm Undersize1Service part / kit buy
185-6554Bearing, Crankshaft, .4mm Undersize1Service part / kit buy
185-6556Washer, Thrust, .4mm Oversize2Service part / kit buy
185-6721Element, Breather1Service part / kit buy
185-6745Piston, Standard3Service part / kit buy
185-6746Piston, .5mm Oversize3Service part / kit buy
185-6855Cylinder Block Assy (Includes Parts Marked *)1Service part / kit buy
185-6856Plug1Service part / kit buy
185-6873Camshaft Assy1Service part / kit buy
185-6874Crankshaft1Service part / kit buy
185-6889Plug1Service part / kit buy
185-7092Cylinder Block Assy1Service part / kit buy
185-7223Plug1Service part / kit buy
185-7308Piston, Standard3Service part / kit buy
185-7309Piston, .5mm Oversize3Service part / kit buy
185-7310Ring Assy, Piston, Standard3Service part / kit buy
185-7311Ring Assy, Piston, .5mm Oversize3Service part / kit buy
185-7376Crankshaft1Service part / kit buy
185-7417Cylinder Block Assy (Begin Spec B)1Service part / kit buy
231-0353-SOAdapter Assy, Generator (Includes Dowel Pin)1Service part / kit buy
333-0594Heater, Engine * −Parts Included in Cylinder Block Assy.1Service part / kit buy
502-0028Plug, Hex Head Pipe1Service part / kit buy
502-0917Adapter, Pipe1Service part / kit buy
505-0098Nipple, Close1Service part / kit buy
505-0763Cross, Pipe1Service part / kit buy
516-0247Pin, Dowel1Service part / kit buy
612-6637AC Control Assembly (single-phase)Service part / kit buy
612-6689DC Control AssemblyService part / kit buy
740-1008Washer, Flat (M10)10Service part / kit buy
800-2515Screw, Hex Head Cap (M8 x 1.25 x 30mm)2Service part / kit buy
815-0585Screw, Hex Head Cap (M10 x 1.25 x 18mm)1Service part / kit buy
815-0600Bolt, Flywheel Housing (M10 x 1.25 x 25mm)10Service part / kit buy
853-2010Washer, EIT Lock (3/8")1Service part / kit buy
A043T620Recommended Spares List (RSL) for RV Generator Set (HDKAH)1Service part / kit buy
A043T622Recommended Spares List (RSL) for RV Generator Set (HDKAJ, HDKAK)1Service part / kit buy
A043T624Recommended Spares List (RSL) for RV Generator Set (HDKAT)Service part / kit buy
A043T632Recommended Spares List (RSL) for RV Generator Set (HDKAU)Service part / kit buy
A046L053Operator Manual for RV Generator SetService part / kit buy
A065U740Mounting Screw Location2Service part / kit buy
ES1992AC conduit connector1Service part / kit buy
EXS1186EXTEND TAIL PIPE 1” PAST OUTSIDE EDGE OF VEHICLEService part / kit buy
F-118North American Sales and Service DirectoryService part / kit buy
FS1463s-4OPTIONAL JUNCTION BOX DOUBLE POLE DOUBLE THROW SWITCHING DEVICE1Service part / kit buy
IN-1013International Sales and Service DirectoryService part / kit buy
RSL-498Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec A)Service part / kit buy
RSL-499Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec B)Service part / kit buy
RSL-500Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec C)Service part / kit buy
RSL-501Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec D)Service part / kit buy
RSL-502Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec E)Service part / kit buy
RSL-503Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec F)Service part / kit buy
RSL-504Recommended Spares List (RSL) for RV Generator Set (HDKAJ, Spec G)Service part / kit buy
RSL-505Recommended Spares List (RSL) for RV Generator Set (HDKAK, Spec B)Service part / kit buy
RSL-506Recommended Spares List (RSL) for RV Generator Set (HDKAK, Spec C)Service part / kit buy
RSL-507Recommended Spares List (RSL) for RV Generator Set (HDKAK, Spec D)Service part / kit buy
RSL-508Recommended Spares List (RSL) for RV Generator Set (HDKAK, Spec E)Service part / kit buy

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

RatingLoadL/hgal/h
Full load100%
Half load50%
No load
Full-load106%0.963.63
Full_load0.853.2
Half-load (4000 w)53%0.490.185
Half_load0.491.85
No-load0.490.185
No_load0.240.9
Prime
Standby
Standby0.490.13
Standby50%1.850.49
Standby100%3.030.8

Available documents

Engine specInstallation manualOperator's manualReferenceOwner's manualParts manualService manual