Service parts for the 40DGCA
Grouped by system, with how many of each the parts manual calls for.
Air intake
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 | 40 kW |
| Oil capacity | 11.5 L |
| Phase | 1 or 3 |
| Battery voltage | 12 VDC V |
Engine
| Oil capacity | 11.5 L |
|---|---|
| Coolant capacity | 16.9 L |
| Displacement | 3.9 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan 4BT3.9-G4| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Normal duty air filter | 0140-3765 | Amazon eBay | ||
| Fuel filter | Oil and fuel filter fitted, water separator | — | 500 hr | ||
| Oil filter | Oil and fuel filter fitted, water separator | — | 500 hr | ||
| Battery | Battery capacity (1x) 75 A/h | — | |||
| Belt | 328876800 | eBay | |||
| Coolant | Coolant capacity (only engine) | 7.2 l | — | ||
| Oil | Lubrication system oil capacity | 11.5 l | — | 1000 hr | |
| Spark plug | — | 1000 hr |
Common questions
What size generator is the Cummins/Onan 40DGCA?
The Cummins/Onan 40DGCA is rated 40 kW standby.
Which engine powers the Cummins/Onan 40DGCA?
The Cummins/Onan 40DGCA is powered by the Cummins/Onan 4BT3.9-G4 engine.
What's the oil capacity on a Cummins/Onan 40DGCA?
The Cummins/Onan 4BT3.9-G4 engine in the Cummins/Onan 40DGCA has an oil capacity of 11.5 liters.
What air filter fits the Cummins/Onan 40DGCA?
The Cummins/Onan 40DGCA uses air filter part number 0140-3765.
Parts
120| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0249-0814 | Relay 2P Base | 1 | Relay 2p base | Amazon eBay |
| 0307-3047 | Relay (24V) | Relay 24v | Amazon eBay | |
| 0332-3923-02 | Terminal Block | Terminal block | Amazon eBay | |
| 0332-3925-02 | Jumper-Terminal | Jumper terminal | Amazon eBay | |
| 0332-3926 | Terminal Block End Stop | Terminal block end stop | Amazon eBay | |
| 0332-3927-02 | Terminal Block End Plate | 1 | Terminal block end plate | Amazon eBay |
| 0332-3943-02 | Jumper-Terminal | Jumper terminal | Amazon eBay | |
| 0332-4036-02 | Terminal Block (Earth) | Terminal block | Amazon eBay | |
| 102-1147 | Gasket, Drain - Oil Pan | 1 | Gasket | Amazon eBay |
| 150-2007 | Guard. Belt Screw. Cap - Hex Head (1/2-13 X 2-1/4“) | Belt | Amazon eBay FridayParts $263.79 | |
| 150-2201 | Sensor, Speed – Magnetic | 1 | Sensor | Amazon eBay |
| 187-0001 | Pump, Water | 1 | Pump | Amazon eBay |
| 187-0002 | Gasket Kit, End - Top | 1 | Gasket | Amazon eBay |
| 187-0008 | Gasket, Cover - Valve | 1 | Gasket | Amazon eBay |
| 187-0009 | Belt, Drive | 4 | Belt | Amazon eBay |
| 187-0010 | Gasket, Thermostat | Thermostat | Amazon eBay | |
| 187-0011 | Filter, Fuel | 1 | Fuel filter | Amazon eBay $80.23 |
| 187-0012 | Gasket, Cover - Valve | 1 | Gasket | Amazon eBay $149.89 |
| 187-0013 | Pump, Transfer - Fuel | Pump | Amazon eBay $100.99 | |
| 187-0020 | Pump, Injection | 1 | Pump | Amazon eBay |
| 193-0244 | Sender, Pressure - 0i1 | 1 | Sensor | Amazon eBay |
| 193-0353 | Sender, Temperature - Oil | 1 | Sensor | Amazon eBay |
| 193-0375 | # Sender, Water Temperature | 1 | Sensor | Amazon eBay |
| 309-0269 | Switch, Low Engine Temperature (S4) | 1 | Sensor | Amazon eBay |
| 309-0272 | Regulator, Voltage - 24 VDC (Used on 35 A MP Alternator) | 1 | Alternator | Amazon eBay |
| 309-0561 | Alternator & Drive Components Group Pulley. Alternator - Multi Groove (Use with 35 A MP Alternator) | 1 | Oil filter | Amazon eBay |
| 328876800 | Belt, V-Grooved | 1 | Belt | eBay |
| 503-0098 | Hose, Oil Drain - Bulk (Order By The Foot - 3 Feet Required) | 1 | Hose | Amazon eBay |
| 503-0183 | Clamp, Hose | 2 | Hose | Amazon eBay |
| 503-0197 | Clip, Hose | 1 | Hose | Amazon eBay $7.99 |
| 503-0685 | Clamp, Hose | 1 | Hose | Amazon eBay $15.00 |
| 505-0059 | Sensor, Water Pressure | 1 | Sensor | Amazon eBay |
| 505-0104 | Element - Air Cleaner - Heavy Duty Primary [AM# CD1830610826] | 1 | Air filter | Amazon eBay |
| 526-0018 | Gasket, Flange (1-3/4) | 1 | Gasket | Amazon eBay FridayParts $1002.50 |
| 960-0136 | Battery, 24V, 55Ah, AGM | 8 | Battery | Amazon eBay |
| 982-0200 | Air Filter | 6 | Air filter | Amazon eBay |
| AN500T0013 | STARTER MOTOR | Starter | Amazon eBay | |
| AN500T0083 | ALTERNATOR | Alternator | Amazon eBay | |
| 102-1237 | Adapter, Oil Drain (Ml8 x 1/2") (S2) | Service part / kit | Amazon eBay | |
| 145-0596 | Service part / kit | Amazon eBay | ||
| 150-2187 | Lever, Actuator - Governor | 1 | Service part / kit | Amazon eBay |
| 150-2203 | Service part / kit | Amazon eBay | ||
| 150-2218 | Service part / kit | Amazon eBay | ||
| 150-2251 | Joint, Ball | 2 | Service part / kit | Amazon eBay |
| 151-0611 | Control, Governor | 1 | Service part / kit | Amazon eBay FridayParts $249.00 |
| 151-0632 | Service part / kit | Amazon eBay FridayParts $315.00 | ||
| 154-2581 | Service part / kit | Amazon eBay | ||
| 155-2062 | Service part / kit | Amazon eBay | ||
| 155-2080 | Service part / kit | Amazon eBay | ||
| 155-2175 | Clamp, Muffler 4" | Service part / kit | Amazon eBay | |
| 155-2256 | Service part / kit | Amazon eBay | ||
| 155-2353 | Service part / kit | Amazon eBay | ||
| 187-0004 | Service part / kit | Amazon eBay | ||
| 187-0007 | Service part / kit | Amazon eBay | ||
| 187-0015 | Filter, Oil | 1 | Service part / kit | Amazon eBay $39.95 |
| 187-0017 | Service part / kit | Amazon eBay | ||
| 187-0018 | Service part / kit | Amazon eBay | ||
| 187-0146 | Service part / kit | Amazon eBay | ||
| 187-0198 | Service part / kit | Amazon eBay | ||
| 309-0553 | Switch, Temperature - Pre Water | 1 | Service part / kit | Amazon eBay $127.46 |
| 309-0554 | Switch, Temperature - Hi Water | 1 | Service part / kit | Amazon eBay $159.00 |
| 323-1200 | # Socket, Contact (Used in J1, J2) | 12 | Service part / kit | Amazon eBay |
| 323-1304 | tiotming, Umector | 1 | Service part / kit | Amazon eBay |
| 323-1306 | Genset component (SJB series) | 1 | Service part / kit | Amazon eBay |
| 332-0051 | Clamp, Loop | 1 | Service part / kit | Amazon eBay |
| 332-0325 | Service part / kit | Amazon eBay | ||
| 332-0941 | *Tie, Cable | 2 | Service part / kit | Amazon eBay |
| 332-1087 | Service part / kit | Amazon eBay | ||
| 332-1279 | Terminal. Lug - Ring (3/8 | 6 | Service part / kit | Amazon eBay |
| 332-1445 | Tie. Cable | 1 | Service part / kit | Amazon eBay |
| 332-2739 | Bracket | Service part / kit | Amazon eBay | |
| 332-2921 | Switch, Temperature - Washer, Lock (M8) | 1 | Service part / kit | Amazon eBay |
| 333-0291 | Service part / kit | Amazon eBay | ||
| 333-0292 | Service part / kit | Amazon eBay | ||
| 353-0094 | Service part / kit | Amazon eBay | ||
| 357-0030 | # Rectifier, Silicon (CR2) | 1 | Service part / kit | Amazon eBay |
| 416-0446 | Cable, Battery - Jumper | 1 | Service part / kit | Amazon eBay |
| 416-0893 | Service part / kit | Amazon eBay | ||
| 416-0921 | Service part / kit | Amazon eBay | ||
| 501-0441 | Line, Fuel - Flex (Fuel In) | 1 | Service part / kit | Amazon eBay |
| 501-0502 | Line, Fuel - Flex (Fuel Out) | 1 | Service part / kit | Amazon eBay |
| 504-0011 | Valve, Shutoff (1/2”) | 1 | Service part / kit | Amazon eBay |
| 505-0026 | Coupling, Pipe (1/8") | Service part / kit | Amazon eBay | |
| 505-0050 | Elbow, Street (1/2' x 90 ° ) | 1 | Service part / kit | Amazon eBay |
| 505-0098 | Band | 1 | Service part / kit | Amazon eBay |
| 505-0185 | Nipple, Half (1/2' x 1.5' lg) | 1 | Service part / kit | Amazon eBay |
| 505-1373 | Service part / kit | Amazon eBay | ||
| 526-0008 | Sender, Temperature - Water | 11 | Service part / kit | Amazon eBay |
| 526-0115 | Washer (5/16 “) | 2 | Service part / kit | Amazon eBay |
| 526-0196 | Washer, Spacer - Shield JC)INT, BALL LINKAGE | Service part / kit | Amazon eBay | |
| 526-0327 | Service part / kit | Amazon eBay | ||
| 800-0012 | Screw, Cap - Hex Head (1/4-20 x 2-1/4”) Begin Spec C MANIFOLD KIT, INTAKE | 2 | Service part / kit | Amazon eBay |
| 800-1003 | Service part / kit | Amazon eBay | ||
| 800-2060 | Screw, Cap - Hex Head (M8x 1.25 x35) | 1 | Service part / kit | Amazon eBay |
| 800-2110 | Hood, Inlet - Air Molded | Service part / kit | Amazon eBay | |
| 800-2112 | Screw. Cap - Hex Head (M12 x 30nin) | 2 | Service part / kit | Amazon eBay |
| 812-0075 | Screw-RHM(8-32xl/4) | Service part / kit | Amazon eBay | |
| 813-0103 | Screw, Machine - Round Head (#10-32 x 3/4º) | 2 | Service part / kit | Amazon eBay $19.00 |
| 815-0172 | Cover, Adapter Outlet | Service part / kit | Amazon eBay | |
| 850-0025 | Screw, Machine - Round Head (#8-32 x 3/8" ) | 2 | Service part / kit | Amazon eBay |
| 850-0030 | Washer, Lock - Spring (#10) | 1 | Service part / kit | Amazon eBay |
| 850-0050 | Washer, Lock - Spring (3/8”) | 4 | Service part / kit | Amazon eBay |
| 850-2006 | Washer, Lock - Spring (M6) | 1 | Service part / kit | Amazon eBay |
| 850-2008 | Washer, Lock (M8) | 1 | Service part / kit | Amazon eBay |
| 850-2012 | Washer, Lock - Spring (M12) | 2 | Service part / kit | Amazon eBay |
| 856-0013 | Washer, Lock - W/EIT (1/2) | 1 | Service part / kit | Amazon eBay |
| 860-2007 | Circuit Breaker Used With Westinghouse Circuit Breaker | 1 | Service part / kit | Amazon eBay |
| 870-0053 | Nut, Hex (s10-32) | 1 | Service part / kit | Amazon eBay |
| 870-0131 | Nut. Hex - with ET (#10-32) | 2 | Service part / kit | Amazon eBay |
| 870-0212 | Nut, Locking (1/4-20) | 4 | Service part / kit | Amazon eBay |
| 871-0010 | Nut, Hex - Srass (#10-32) Washer, Lock - EIT (#10) Washer, Lock - IT (#10) | 3 | Service part / kit | Amazon eBay |
| 871-0028 | Service part / kit | Amazon eBay | ||
| 928-0502B | Service part / kit | Amazon eBay | ||
| 928-0506 | Service part / kit | Amazon eBay | ||
| 960-0135 | Service part / kit | Amazon eBay $19.00 | ||
| 960-0242 | Service part / kit | Amazon eBay | ||
| 960-0504A | Service part / kit | Amazon eBay | ||
| 960-0505 | Service part / kit | Amazon eBay | ||
| 960-12 | Service part / kit | Amazon eBay | ||
| 965-0520 | Cooling Fan | 37 | 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
Parts manual — 0960-0210 I8 201512 (Cummins/Onan)Parts manual — 960-0207 Onan DGBB DGBC DGCA DGCB Parts Manual (7-1996) (Cummins/Onan)Parts manual — 960-0210C Onan DGBB DGBC DGCA DGCB Parts Manual (11-1998) (Cummins/Onan)Parts manual — NET-Onan (Cummins/Onan)