Service parts for the 40DGCA
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 | 40 kW |
| Oil capacity | 10.9 L |
| Phase | 1 or 3 |
| Battery voltage | 12 VDC V |
Engine
| Oil capacity | 10.9 L |
|---|---|
| Coolant capacity | 16.9 L |
| Displacement | 3.9 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Filters for the Cummins/Onan 4BT3.9-G4
7Engine-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 | P558616 | Lube Filter, Spin-On Full Flow | CUMMINS 3290712, CUMMINS 3890709, NAPA 1602, BALDWIN BT427 | KuduParts $11.00 FridayParts $13.20 |
| Oil filter | P550939 | Lube Filter, Spin-On Full Flow | CUMMINS 148459, CUMMINS 162097, NAPA 1521, NAPA 21521 | FridayParts $23.20 |
| Fuel filter | P550440 | Fuel Filter, Spin-On Secondary | CUMMINS 3831063, CUMMINS 3890707, NAPA 3358, BALDWIN BF788 | FridayParts $356.80 |
| Fuel filter | P553004 | Fuel Filter, Spin-On | CUMMINS 3903640, CUMMINS 53C0045, NAPA 3358, RENAULT VI 0000150564 | FridayParts $18.20 |
| Fuel / water separator | P551329 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 11E170210, CUMMINS 3890063, NAPA 3357, BALDWIN BF1280 | FridayParts $151.00 |
| Fuel / water separator | P550248 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 1492827, CUMMINS 3286503, NAPA 3472, BALDWIN BF1226 | FridayParts $229.00 |
| Coolant filter | P554071 | Coolant Filter, Spin-On | CUMMINS 209604, CUMMINS 209606, NAPA 4071, WALGAHN-MOTORENTECHN 00811412 | FridayParts $397.60 |
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 | By-pass filter I | REC149-2106 | Amazon eBay $18.20 | ||
| 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 |
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | SAE 10W-30 | RM92-8M0086220U6 / RM92-8M0086221U3 | |||
| Engine oil | SAE 15W-40 | RM92-8M0096794U3; diesel engines | |||
| Engine oil | SAE 25W-40 | RM92-8M0086227U3 / RM92-8M0086224U3 | |||
| Engine oil | TC-W3 | TC-W3 | 2-cycle outboard oil; RM92-858026QB1U6 / RM92-858027QB1U3 / RM92-858037QB1U3 | ||
| Gear oil | SAE 80W90 | LUB11564U12 / LUB11565 / LUB11540U12 / LUB11552U12 / LUB11546 | |||
| Gear oil | SAE 90W | RM92-858064QB1U6 / RM92-858065QB1U2 | |||
| Grease | Lithium grease with Teflon | LUB11363 | |||
| Grease | Marine grease | LUB11400 / LUB11406 | |||
| Other | Power Trim & Tilt fluid | LUB11591U12 / LUB11592 / LUB11593 |
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 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 10.9 liters.
How much coolant does the Cummins/Onan 40DGCA hold?
The Cummins/Onan 40DGCA cooling system holds 16.9 liters (4.5 US gallons) for the engine, per the manufacturer specification sheet.
What oil filter does the Cummins/Onan 40DGCA use?
The Cummins/Onan 40DGCA uses oil filter part number REC149-2106.
What air filter fits the Cummins/Onan 40DGCA?
The Cummins/Onan 40DGCA uses air filter part number 0140-3765.
Parts
90| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0307-3047 | Relay (24V) | Relay 24v | Amazon eBay | |
| 0332-3923-02 | Terminal Block | 3 | Terminal block | Amazon eBay |
| 0332-3925-02 | Jumper-Terminal | Jumper terminal | 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“) | 1 | Belt | Amazon eBay FridayParts $263.79 KuduParts $344.00 |
| 150-2201 | Sensor, Speed – Magnetic | 1 | Sensor | Amazon eBay $249.10 |
| 187-0001 | Pump, Water | 1 | Pump | Amazon eBay |
| 187-0002 | Gasket Kit, End - Top | 1 | Gasket | Amazon eBay |
| 187-0008 | Belt, Drive | 4 | Belt | Amazon eBay |
| 187-0009 | Belt, Drive | 4 | Belt | Amazon eBay |
| 187-0011 | Filter, Fuel | 1 | Fuel filter | Amazon |
| 187-0013 | Pump, Transfer-Fuel | Pump | Amazon eBay $100.99 | |
| 187-0018 | INJ. PUMP | Pump | Amazon eBay | |
| 187-0020 | Thermostat | 1 | Thermostat | Amazon eBay |
| 193-0244 | Sender, Oil Pressure (E1) | 1 | Sensor | Amazon eBay |
| 193-0353 | Sender, Temperature - Oil | 1 | Sensor | Amazon eBay |
| 193-0375 | Sender, Coolant | 1 | Sensor | Amazon eBay |
| 309-0269 | Sender, Temperature-Lo Engine | 1 | Sensor | Amazon eBay $239.00 |
| 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 | Alternator | Amazon eBay |
| 328876800 | Belt, V-Grooved | 1 | Belt | eBay |
| 501-0441 | Line, Fuel - Flex (Fuel In) | 1 | Hose | Amazon eBay |
| 501-0502 | Line, Fuel-Flex (Fuel Out) | 1 | Hose | Amazon eBay |
| 503-0098 | Hose, Oil Drain - Bulk (Order By The Foot - 3 Feet Required) | 1 | Hose | Amazon eBay |
| 503-0183 | Clamp, Hose | 1 | 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 |
| 982-0200 | Air Filter | 6 | Air filter | Amazon eBay |
| AN500T0013 | STARTER MOTOR | Starter | Amazon eBay | |
| AN500T0083 | ALTERNATOR | Alternator | Amazon eBay | |
| REC149-2106 | By-pass filter I | 1 | Oil filter | Amazon eBay $18.20 |
| REC1491754 | By-pass filter II | 1 | Oil filter | Amazon eBay |
| 0249-0814 | Relay 2P Base | 1 | Service part / kit | Amazon eBay |
| 0332-3926 | Terminal Block (End Stop) | 2 | Service part / kit | Amazon eBay |
| 0332-3927-02 | Terminal Block (End Plate) | 1 | Service part / kit | Amazon eBay |
| 102-1237 | Adapter, Drain-Oil | 1 | Service part / kit | Amazon eBay |
| 151-0611 | Control, Governor | 1 | Service part / kit | Amazon eBay FridayParts $249.00 |
| 155-2175 | Clamp, Muffler 4" | 1 | Service part / kit | Amazon eBay |
| 187-0007 | INJ | Service part / kit | Amazon eBay | |
| 187-0012 | Filter, Fuel | 1 | Service part / kit | Amazon eBay $149.89 NAPA $17.15 |
| 187-0015 | Filter, Oil | 1 | Service part / kit | Amazon eBay $39.95 |
| 309-0553 | Switch, Temperature-Pre Water | 1 | Service part / kit | Amazon eBay $127.46 |
| 309-0554 | SWITCH WATER | 1 | Service part / kit | Amazon eBay $159.00 |
| 323-1200 | # Socket, Contact (Used in J1, J2) | 1 | 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 |
| 332-0941 | *Tie, Cable | 1 | Service part / kit | Amazon eBay |
| 332-1279 | Terminal. Lug - Ring (3/8 | 6 | Service part / kit | Amazon eBay |
| 332-1445 | Tie, Cable 18 98-5219 1 Decal - Panel Front (Not I l l u s t r a t e d ) 19 98-5220 1 Decal | 3 | Service part / kit | Amazon eBay |
| 332-2739 | Bracket | 1 | Service part / kit | Amazon eBay |
| 332-2921 | Switch, Temperature - Washer, Lock (M8) | 1 | Service part / kit | Amazon eBay |
| 357-0030 | Rectifier | 1 | Service part / kit | Amazon eBay $38.99 |
| 416-0446 | Cable, Battery - Jumper | 1 | Service part / kit | Amazon eBay |
| 504-0011 | Valve, Shutoff (1/2”) | 1 | Service part / kit | Amazon eBay $59.95 |
| 505-0026 | Coupling, Pipe (1/8") | 2 | 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 |
| 505-0104 | Nipple, Pipe - Close | 1 | Service part / kit | Amazon eBay |
| 505-0185 | Nipple, Half (1/2' x 1.5' lg) | 1 | Service part / kit | Amazon eBay |
| 526-0008 | 148-036’? | 1 | Service part / kit | Amazon eBay |
| 526-0018 | Gasket, Flange (1-3/4) | 1 | Service part / kit | Amazon eBay |
| 526-0115 | Washer (5/16 “) | 1 | Service part / kit | Amazon eBay |
| 526-0196 | Washer, Spacer - Shield JC)INT, BALL LINKAGE | 0 | Service part / kit | Amazon eBay |
| 526-0327 | Control, Governor | 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 |
| 800-2060 | Screw, Cap - Hex Head (M8x 1.25 x35) | 1 | Service part / kit | Amazon eBay |
| 800-2110 | Hood, Inlet - Air Molded | 1 | 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) | 5 | 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 | 1 | 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”) | 2 | 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) | 3 | 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) | 1 | Service part / kit | Amazon eBay |
| 870-0212 | Nut, Locking (1/4-20) | 2 | Service part / kit | Amazon eBay |
| 871-0010 | Nut, Hex - Srass (#10-32) Washer, Lock - EIT (#10) Washer, Lock - IT (#10) | 8 | Service part / kit | Amazon eBay |
| 871-0028 | NUT | 1 | Service part / kit | Amazon eBay |
| 960-0136 | Battery, 24V, 55Ah, AGM | 8 | 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 — 960-0231 Onan DGB DGC Parts Manual (6-1993) (Cummins/Onan)Parts manual — NET-Onan (Cummins/Onan)
This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.