Service parts for the 3.5CCK
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Frequency | 50.0 Hz |
|---|---|
| Standby power | 3 kW |
| Prime power | 3 kW |
| Oil capacity | 2.8 L |
| Voltage options | 120/240 V |
Maintenance & consumables
for the Cummins/Onan CCK| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Element, Air Cleaner | 140P837 | Amazon eBay | ||
| Oil filter | Element, Oil Filter | 122-75 | Amazon eBay | ||
| Belt | Belt, Alternator | 511-76 | Amazon eBay | ||
| Fuel | Fuel system and pump | — | |||
| Oil | API SE or SE/CC | 3.79 liters | — | 200 hr | |
| Spark plug | Gasoline engines | — | 30 hr |
Common questions
What size generator is the Cummins/Onan 3.5CCK?
The Cummins/Onan 3.5CCK is rated 3 kW standby.
What engine is in the Cummins/Onan 3.5CCK?
The Cummins/Onan 3.5CCK is powered by the Cummins/Onan CCK engine.
How much oil does the Cummins/Onan 3.5CCK take?
The Cummins/Onan CCK engine in the Cummins/Onan 3.5CCK has an oil capacity of 2.8 liters.
What oil filter fits the Cummins/Onan 3.5CCK?
The Cummins/Onan 3.5CCK uses oil filter part number 122-75.
What air filter fits the Cummins/Onan 3.5CCK?
The Cummins/Onan 3.5CCK uses air filter part number 140P837.
Parts
74| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 101K115 | Gasket Kit, Rear Bearing Plate | 1 | Gasket | Amazon |
| 102B158 | Gasket, Oil Base | 1 | Gasket | Amazon eBay |
| 103B1 | Gasket, Gear Cover | 1 | Gasket | Amazon |
| 103B11 | Gasket, Gear cover | 1 | Gasket | Amazon |
| 110A667 | Gasket, Valve Cover | 2 | Gasket | Amazon eBay |
| 110A892 | Gasket, Cylinder Head | 2 | Gasket | Amazon |
| 110B880 | Gasket, Fuel Pump Hole Cover | 1 | Gasket | Amazon |
| 110D883 | Gasket, Cylinder Head Left #1 Hi-Comp | 1 | Gasket | Amazon |
| 110D884 | Gasket, Cylinder Head Right #2 Hi-Comp | 1 | Gasket | Amazon |
| 110D890 | Gasket, Cylinder Head Right #2 | 1 | Gasket | Amazon |
| 110D891 | Gasket, Cylinder Head Left #1 | 1 | Gasket | Amazon |
| 120A187 | Pump - Includes Cup, Screen and Pipe | 1 | Pump | Amazon |
| 120A491 | *Gasket, Diaphragm | 1 | Gasket | Amazon eBay |
| 120K161 | Gasket Kit, Oil Pump | 1 | Gasket | Amazon |
| 122-37 | Cartridge, Oil Filter | 1 | Oil filter | Amazon eBay |
| 122-75 | Element, Oil Filter | 1 | Oil filter | Amazon eBay |
| 122C9 | Filter, Oil - Includes Cartridge (Optional) | 1 | Oil filter | Amazon |
| 123A104 | Gasket, Oil Fill Tube | 1 | Gasket | Amazon |
| 123A191 | Gasket, Oil Fill Cap | 1 | Gasket | Amazon eBay |
| 134B660 | Element, Vernatherm | 1 | Thermostat | Amazon |
| 140B495 | Air Cleaner Element | 1 | Air filter | Amazon eBay |
| 140P837 | Element, Air Cleaner | 1 | Air filter | Amazon eBay |
| 141A78 | Carburetor Flange Gasket | 1 | Gasket | Amazon eBay |
| 142-31 | Gasket, Body to Bowl | 1 | Gasket | Amazon Amazon eBay eBay |
| 142-32 | Gasket, Nozzle | 1 | Gasket | Amazon eBay KuduParts $31.00 |
| 142-33 | *Gasket Kit, Carburetor | 1 | Gasket | Amazon eBay |
| 142-361 | Gasket, Nozzle | 1 | Gasket | Amazon |
| 142-49 | *Valve and Seat Assembly, Float - Includes Gasket ........•...•.. | 1 | Gasket | Amazon Amazon eBay eBay |
| 145B266 | Gasket, Carburetor Adapter to Manifold | 1 | Gasket | Amazon |
| 148-0034 | Pressure Reducing | 1 | Pressure reducing | Amazon eBay |
| 148A17 | @Gasket, Bushing - Float Lock. | 1 | Gasket | Amazon eBay |
| 148A22 | Gasket, Adapter Mounting | 1 | Gasket | Amazon |
| 149-0558 | Fuel Strainer | 1 | Fuel strainer | Amazon eBay |
| 149-0751 | Electric Shutoff Valve | 1 | Electric shutoff valve | Amazon eBay |
| 149-149 | Filter, Fuel | 1 | Fuel filter | Amazon eBay |
| 149-150 | Bowl, Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 149A3 | Gasket, Fuel Pump Mtg. 45 502-3 ! Connector, Fue! Filter | 1 | Gasket | Amazon eBay |
| 149A404 | Seal, 'O' Ring | 1 | Seal | Amazon |
| 149A858 | Gasket, Diaphragm | 1 | Gasket | Amazon eBay |
| 149A95 | Gasket, Valve | 2 | Gasket | Amazon eBay |
| 149D693 | Pump, Fuel - ONAN mfr., with primer lever - Replaces earlier atyle pumps used, of any manufacture | 1 | Pump | Amazon eBay |
| 150A425 | Gasket, Booster to Manifold | 1 | Gasket | Amazon eBay |
| 150A668 | Gasket, Diaphragm Plate | 1 | Gasket | Amazon eBay |
| 154A13 | Gasket, Intake Manifold | 1 | Gasket | Amazon eBay |
| 154A360 | Gasket, Carburetor Mounting | 1 | Gasket | Amazon eBay |
| 154C377 | Gasket, Exhaust Manifold or Muffler Mounting | 1 | Gasket | Amazon |
| 160A150 | Gasket, Breaker Box Cover | 1 | Gasket | Amazon |
| 160A43 | Gasket, Breaker Box Mounting | 1 | Gasket | Amazon eBay |
| 160A723 | Gasket, Breaker Box and Spacer Mounting | 1 | Gasket | Amazon eBay |
| 167-177 | Plug, Spark | 2 | Spark plug | Amazon |
| 167-241 | Plug, Spark | 2 | Spark plug | Amazon |
| 168K103 | Gasket Kit, Plant | 1 | Gasket | Amazon |
| 168K67 | Gasket Kit, Plant (Repl. 16aK103) | 1 | Gasket | Amazon eBay |
| 168K88 | Gasket Kit, Complete Engine | 1 | Gasket | Amazon |
| 168K95 | Gasket Kit, Carbon Removal | 1 | Gasket kit | Amazon eBay |
| 193A108 | Element, Oil Pressure | 1 | Sensor | Amazon eBay |
| 501A118 | Line, Flexible Oil | 1 | Hose | Amazon |
| 501A9 | Line, Flexible Fuel | 1 | Hose | Amazon eBay |
| 503A480 | Hose, Air Cleaner | 1 | Hose | Amazon |
| 509-65 | 149A1042 | 2 | Seal | Amazon eBay |
| 509-8 | Seal, Governor Shaft Oil | 1 | Seal | Amazon eBay |
| 509-9 | Seal, "O" Ring | 1 | Seal | Amazon |
| 509A40 | *Seal, Gear Cover | 1 | Seal | Amazon eBay |
| 509A41 | Seal, Bearing Plate | 1 | Seal | Amazon eBay |
| 509A97 | Seal, Oil - Gear Cover | 1 | Seal | Amazon |
| 511-76 | Belt, Alternator | 1 | Belt | Amazon eBay |
| 514-51 | Belt, Charge Generator Drive | 1 | Belt | Amazon eBay |
| 518-129 | *Gasket, Fuel Pump Mounting | 1 | Gasket | Amazon eBay |
| XA-744AN | Seal, 'O' Ring | 1 | Seal | Amazon |
| 160A2 | Point Set, Breaker | 1 | Service part / kit | Amazon eBay |
| 160A75 | 160A 150 | 1 | Service part / kit | Amazon eBay |
| 201-1312 | Rotor Assembly, Wound | 1 | Service part / kit | Amazon eBay |
| 222-1675 | Coil Assembly, Field | 1 | Service part / kit | Amazon eBay |
| 312A69 | Condenser | 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
Operator's manual — 927-0300 Onan CCK (spec A-K) Genset Operator's manual & Parts catalog (07-1973) (Cummins/Onan)Parts manual — 927-0220 Onan CCK (spec A-U) RV Genset Parts manual (04-1989) (Cummins/Onan)