The Cummins/Onan VT1710-P635 is a 27.84 L 12-cylinder engine rated at 1800 rpm, producing up to 409.48 kW. It powers generator sets from Cummins/Onan, including the DFU Series. It holds 21 L (5.5 gal) of oil and 35 L (9.2 gal) of coolant.
Also known as: Cummins VT1710-P635
Part of the Cummins/Onan VT1710 engine family — 2 variants share parts & fitment.
| Oil capacity | 21.0 L |
|---|---|
| Coolant capacity | 35.0 L |
| Displacement | 27.84 L |
| Cylinders | 12 |
| Rated speed | 1800 rpm |
| Gross power | 409 kW |
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan VT1710-P635.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | service frequently | — | find | ||
| Fuel filter | filter or strain fuel when filling tank | — | find | ||
| Oil filter | — | 1000 hr | find | ||
| Belt | — | 1000 hr | find | ||
| Coolant | fill before starting, check level several times and replenish if necessary | 42.0 gallons | — | ||
| Oil | drained prior to shipment, fill to capacities shown | 18.0 gallons | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 503-0008 | Belt, Alternator Drive | belt |
| 130-0465 | Brace | brace |
| 130-0466 | Brace | brace |
| 110-1168 | Bracket & Nipple Assembly | bracket_nipple |
| 505-0207 | Bushing, Reducer (2-1/2 x 2") | bushing_reducer |
| 505-0270 | Bushing, Reducer (2 x 1-1/4") | bushing_reducer |
| 503-0011 | Clamp | clamp |
| 503-0059 | Clamp | clamp |
| 503-0518 | Clamp | clamp |
| 330-0004 | Cover, Box | cover_box |
| 505-0719 | Cross, Pipe (1") | cross_pipe |
| 504-0006 | Valve, Drain | drain_valve |
| 505-0453 | Elbow (90° ) | elbow_90 |
| 505-0175 | Elbow | elbow_pipe |
| 505-0216 | Elbow! Street (90°) | elbow_street |
| 130-0740 | Flange Assembly | flange_assembly |
| 503-0249 | Hose − Bulk (Order by the Foot − 3 Feet Required) | hose |
| 503-0359 | Hose (1-5/8" I.D. x 3 ' )' | hose |
| 503-0365 | Clamp, Hose | hose |
| 503-0512 | Hose (2-7/8" I.D. x 18" ) | hose |
| 503-0569 | Hose (3−1/2” ID) Bulk (Order By The Foot − 2 Feet Required) | hose |
| 505-0172 | Nipple, Close (2 x 2") | hose |
| 309-0243 | Valve, Marsh (1-1/4" ) | marsh_valve |
| 307-0844 | Valve, Solenoid | nipple |
| 505-0173 | Nipple (2 x 4") | nipple |
| 505-0328 | Nipple ( 3 x 6 " ) | nipple |
| 505-0604 | Nipple (3 x 9-3/4" ) | nipple |
| 505-0615 | Nipple (3 x 24" ) | nipple |
| 505-0178 | Nipple, Half | nipple_half |
| 505-0380 | Nipple, Half (2 x 3") | nipple_half |
| 505-0437 | Nipple, Half (1-1/4 x 4") | nipple_half |
| 130-0687 | Standpipe | other_service |
| 307-0839 | Valve, Solenoid | other_service |
| 331-0027 | Clamp, Junction Box - Spec A through G | other_service |
| 333-0138 | Heater, Engine (4000 Watts, 240 Volts) | other_service |
| 503-0429 | Screw, Self-locking (3/8-16 x 3/4“) | other_service |
| 504-0062 | 504-005 I | other_service |
| 505-0042 | Elbow (90°) | other_service |
| 505-0057 | 1 Plug (1/8") 10 ELBOW, OIL LINE TO FILTER ADAPTER | other_service |
| 505-0086 | Nipple (4 x 2-1/2"}, Exhaust 850-0030 2 Air Inlet Mounting (#10) | other_service |
| 505-0099 | Vaporizer Assembly Bracket, Vaporizer Mounting | other_service |
| 505-0258 | Nipple (1-1/4 x 3") | other_service |
| 505-0419 | Nipple (2 x 12") | other_service |
| 505-0669 | Tee | other_service |
| 505-0679 | Nipple (3 x 12" ) | other_service |
| 800-0006 | Screw (1/4-20 x 7/8") - Not Shown | other_service |
| 800-0007 | Plug, Oil Drain | other_service |
| 800-0091 | 3 Pole | other_service |
| 813-0103 | Screw, Machine - Round Head (#10-32 x 3/4º) | other_service |
| 850-0040 | Base, Oil | other_service |
| 850-0060 | Washer, Lock - Spring | other_service |
| 862-0001 | Stud (1/4-20x3.12) | other_service |
| 862-0005 | Nipple, Pipe - Close Plug, Pipe - Square Head Clamp | other_service |
| 870-0053 | (350-0030 | other_service |
| 330-0005 | Box, Outlet | outlet_box |
| B184 | PHASE SELECTOR SWITCH | phase_selector_switch |
| 800-0092 | Screw, Cap - Hex Head (1/2-13 x 1.5) | screw |
| 179-0341 | Solenoid Valve Installation | solenoid_valve |
| 130-0897 | Support | support |
| 309-0253 | Thermostat | thermostat |
| 130-0801 | Nipple Assembly, Waterline | waterline_nipple |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan VT1710-P635 engine has an oil capacity of 21.0 liters.
The Cummins/Onan VT1710-P635 has a displacement of 27.84 liters with 12 cylinders.
The Cummins/Onan VT1710-P635 powers 1 generator set(s), including Cummins/Onan DFU Series.
A commonly reported issue on generators using the Cummins/Onan VT1710-P635 is: When pressing test lamp button - one or more fault lamps do not light.. Fix: Fault lamp/lamps burned out - replace..