Service parts for the C1250 D6
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 1120 kW |
| Standby kVA | 1270 |
| Prime power | 1120 kW |
| Controller | PowerCommand, PowerCommand 3.3 |
| Voltage options | 220 V, 380 V, 1905 V, 3300 V, 219 V, 2400 V, 4160 V, 230 V, 400 V, 3640 V, 6300 V, 254 V, 440 V, 7200 V, 1247 V, 240 V, 415 V, 3810 V, 6600 V, 277 V, 480 V, 7620 V, 1320 V, 6350 V, 1100 V, 347 V, 600 V, 7970 V, 1380 V |
| Phase | A (U), B (V), C (W) |
| Battery cranking | 1800 CCA |
| Dimensions (L×W×H) | 5105×2000×2238 mm |
| Dry weight | 9190 kg |
Maintenance & consumables
for the Cummins/Onan C1250 D6| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry replaceable element | — | 3600 hr | ||
| Fuel filter | Cummins Filtration FS1006 | FS1006 | Amazon $33.95 eBay $29.99 | ||
| Oil filter | LF3325 | Amazon $51.99 eBay $229.00 KuduParts $74.00 | |||
| Battery | 24V | — | 460 hr | ||
| Belt | — | ||||
| Coolant | 50/50 Ethylene Glycol and Water | 12.7 L | — | 3600 hr | |
| Oil | Cummins Filtration LF3325 | 160.0 qt | — | 3600 hr | |
| Spark plug | — |
Common questions
What size generator is the Cummins/Onan C1250 D6?
The Cummins/Onan C1250 D6 is rated 1120 kW standby (1270.0 kVA).
Which engine powers the Cummins/Onan C1250 D6?
The Cummins/Onan C1250 D6 is powered by the Cummins/Onan C1250 D6 engine.
What fuel does the Cummins/Onan C1250 D6 use?
The Cummins/Onan C1250 D6 runs on Diesel.
What oil filter fits the Cummins/Onan C1250 D6?
The Cummins/Onan C1250 D6 uses oil filter part number LF3325.
What fuel filter fits the Cummins/Onan C1250 D6?
The Cummins/Onan C1250 D6 uses fuel filter part number FS1006.
Parts
157| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0300-4623-29 | DFLB (600V) | 1 | Current transformer | Amazon eBay |
| 0300-4623-30 | DFLC (600V) | 1 | Current transformer | Amazon eBay |
| 0300-4623-52 | DFLB BR (0-480V) | 1 | Current transformer | Amazon eBay $162.95 |
| 0300-4623-54 | DFLC BR (0-480V) | 1 | Current transformer | Amazon eBay |
| 106069 | SCREW, HEXAGON HEAD CAP | 6 | Bolt | Amazon eBay |
| 140-2096 | Element, Primary (Outer) | 2 | Air filter | Amazon eBay |
| 140-2097 | Cleaner, Air (Includes Elements) | 1 | Air filter | Amazon eBay FridayParts $856.89 |
| 140-2467 | Element, Safety (Inner) | 2 | Air filter | Amazon eBay |
| 140-2501 | Cleaner, Air (Disposable) | 2 | Air filter | Amazon eBay $292.25 FridayParts $152.02 |
| 140-2502 | Band, Mounting | 4 | Air filter | Amazon eBay $69.95 |
| 140-2503 | Bracket, Mounting | 1 | Air filter | Amazon eBay |
| 140-3230 | Cleaner, Air (Includes Elements - See Ref. No. 25 and 26) | 2 | Air filter | Amazon eBay FridayParts $856.89 |
| 148582 | DOE, PIN | 2 | Dowel pin | Amazon eBay |
| 205059 | WASHER, PLAIN | 4 | Gasket | Amazon eBay |
| 205230 | BUSSING | 34 | Bushing | Amazon eBay FridayParts $37.49 |
| 205584 | SCREW, TWELVE POINT CAP | 18 | Bolt | Amazon eBay FridayParts $38.90 |
| 205684 | BRACKET, LIFTING | 4 | Bracket lifting | Amazon eBay |
| 205741 | SHIM, A/R .007 Inch O/S | 8 | Shim | Amazon eBay |
| 205742 | SHIM, A/R .008 Inch O/S | 8 | Shim | Amazon eBay |
| 205743 | SHIM, A/R .009 Inch O/S | 8 | Shim | Amazon eBay |
| 205744 | SHIM, A/R .020 Inch O/S | 8 | Shim | Amazon eBay |
| 205745 | SHIM, A/R .031 Inch O/S | 8 | Shim | Amazon eBay |
| 206028 | SCREW, SOCKET HEAD CAP | 4 | Bolt | Amazon eBay |
| 206224 | PLUG, EXPANSION | 2 | Expansion plug | Amazon eBay |
| 206580 | BEARING, MAIN | 7 | Main bearing | Amazon eBay |
| 206581 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper | 7 | Main bearing | Amazon eBay |
| 206582 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper | 7 | Main bearing | Amazon eBay |
| 206583 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper | 7 | Main bearing | Amazon eBay $74.95 |
| 206584 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Upper | 7 | Main bearing | Amazon eBay |
| 206587 | CAP, MAIN BEARING | 7 | Bearing cap | Amazon eBay |
| 206588 | CAP, MAIN BEARING | 7 | Bearing cap | Amazon eBay |
| 206590 | BEARING, MAIN | 7 | Main bearing | Amazon eBay |
| 206591 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower | 7 | Main bearing | Amazon eBay |
| 206592 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower | 7 | Main bearing | Amazon eBay |
| 206593 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower | 7 | Main bearing | Amazon eBay |
| 206594 | BEARING, MAIN A/R No.2,3,4,5,6,7,&8, Lower | 7 | Main bearing | Amazon eBay $74.95 |
| 206600 | BEARING, MAIN | 2 | Main bearing | Amazon eBay |
| 206601 | BEARING, MAIN A/R No.1&9, Upper | 2 | Main bearing | Amazon eBay |
| 206602 | BEARING, MAIN A/R No.1&9, Upper | 2 | Main bearing | Amazon eBay |
| 206603 | BEARING, MAIN A/R No.1&9, Upper | 2 | Main bearing | Amazon eBay |
| 206604 | BEARING, MAIN A/R No.1&9, Upper | 2 | Main bearing | Amazon eBay $74.95 |
| 206610 | BEARING, MAIN | 2 | Main bearing | Amazon eBay |
| 206611 | BEARING, MAIN A/R No.1&9, Lower | 2 | Main bearing | Amazon eBay |
| 206612 | BEARING, MAIN A/R No.1&9, Lower | 2 | Main bearing | Amazon eBay |
| 206613 | BEARING, MAIN A/R No.1&9, Lower | 2 | Main bearing | Amazon eBay |
| 206614 | BEARING, MAIN A/R No.1&9, Lower | 2 | Main bearing | Amazon eBay |
| 206742 | PLUG, EXPANSION | 16 | Expansion plug | Amazon eBay |
| 3000138 | SUPPORT, BEARING | 1 | Support bearing | Amazon eBay |
| 3000139 | BEARING, THRUST | 2 | Thrust bearing | Amazon eBay |
| 3001708 | BEARING, THRUST A/R .010 Inch O/S | 2 | Thrust bearing | Amazon eBay |
| 3001709 | BEARING, THRUST A/R .020 Inch O/S | 2 | Thrust bearing | Amazon eBay |
| 3001710 | BEARING, THRUST A/R .030 Inch O/S | 2 | Thrust bearing | Amazon eBay |
| 3001711 | BEARING, THRUST A/R .040 Inch O/S | 2 | Thrust bearing | Amazon eBay |
| 3002993 | DOE, RING | 32 | Gasket | Amazon eBay FridayParts $73.40 |
| 3011076 | SEAL, D RING | 1 | Seal | Amazon eBay |
| 3011884 | INSERT, LINER | 1 | Insert liner | Amazon eBay FridayParts $38.99 |
| 3014668 | SEAL, D RING | 1 | Seal | Amazon eBay |
| 3018210 | SET, MAIN BEARING STANDARD | 1 | Main bearing set | Amazon eBay FridayParts $497.50 |
| 3018211 | SET, MAIN BEARING A/R .010 Inch O/S | 1 | Main bearing set | Amazon eBay |
| 3018212 | SET, MAIN BEARING A/R .020 Inch O/S | 1 | Main bearing set | Amazon eBay |
| 3018213 | SET, MAIN BEARING A/R .030 Inch O/S | 1 | Main bearing set | Amazon eBay |
| 3019150 | INSERT, LINER | 1 | Insert liner | Amazon eBay FridayParts $90.59 |
| 3021148 | INSERT, LINER | 1 | Insert liner | Amazon Amazon eBay eBay |
| 3025485 | WASHER, PLAIN | 18 | Gasket | Amazon eBay |
| 3032633 | SCREW, TWELVE POINT CAP | 96 | Bolt | Amazon eBay FridayParts $897.38 |
| 3033853 | SHAFT, IDLER | 2 | Shaft idler | Amazon eBay |
| 3081489 | SEAL, OIL | 1 | Seal | Amazon eBay |
| 3175281 | SHAFT, IDLER | 1 | Shaft idler | Amazon eBay |
| 3176857 | DOE, RING | 9 | Gasket | Amazon eBay |
| 3177556 | SEAL, RECTANGULAR RING | 6 | Seal | Amazon eBay |
| 3177945 | SCREW, HEX FLANGE HEAD CAP | 2 | Bolt | Amazon eBay |
| 3178450 | WASHER, PLAIN | 2 | Gasket | Amazon eBay KuduParts $131.00 |
| 3178457 | WASHER, PLAIN | 3 | Gasket | Amazon eBay |
| 3178464 | PLATE, COVER | 2 | Plate cover | Amazon eBay $74.95 |
| 3178803 | CYLINDER BLOCK OPTION BP6089 | 1 | Cylinder block | Amazon eBay |
| 3178910 | CYLINDER BLOCK | 1 | Cylinder block | Amazon eBay |
| 3179664 | VALVE, PISTON COOLING | 1 | Valve piston cooling | Amazon eBay FridayParts $95.50 |
| 3628452 | SCREW, HEXAGON HEAD CAP | 18 | Bolt | Amazon eBay |
| 3628605 | PLUG, PIPE | 18 | Pipe plug | Amazon eBay |
| 3628607 | PLUG, PIPE | 1 | Pipe plug | Amazon eBay |
| 3629168 | PLUG, EXPANSION | 12 | Expansion plug | Amazon eBay |
| 3629497 | DRAINCOCK | 3 | Draincock | Amazon eBay |
| 502-1162 | Connector, Hose (3/8") | 2 | Hose | Amazon eBay |
| 503-0685 | Clamp, Hose | 1 | Hose | Amazon eBay $15.00 |
| 503-0868 | Clamp, Hose - T-Bolt Type (3.5" NON) | 8 | Hose | Amazon eBay |
| 503-1140 | Hose, Rubber | 2 | Hose | Amazon eBay |
| 503-1484 | Elbow, Hose (45 Deg) (7" ID) | 2 | Hose | Amazon eBay |
| 503-1620 | Hose – Bulk (3/8" ID) (Order by the Foot) | - | Hose | Amazon eBay |
| 503-1727 | Hose, Radiator (3” ID x 10”) | 2 | Hose | Amazon eBay |
| 503-1728 | Hose (3” ID x 5–1/2”) | 1 | Hose | Amazon eBay |
| 503-1743-01 | Alternator & Orive Components Group Pulley, Alternator - Multi Groove (Use with 35 AMP Alternator) | 1 | Alternator | Amazon eBay |
| 503-1870-11 | Clamp, Hose | 2 | Hose | Amazon eBay |
| 503-1870-12 | Clamp, Hose | 2 | Hose | Amazon eBay |
| 505-0324 | Hose. Bulk (Sold by the Foot) Two Feet Required Nipple, Pipe - Half (3/4 NPT x 2"LG) | 1 | Hose | Amazon eBay |
| 68445 | PIN, GROOVE | 32 | Pin | Amazon eBay |
| 70662 | DOE, PIN | 2 | Dowel pin | Amazon eBay |
| 960-0504 | PCC Control Service Manual | * | Service manual | Amazon eBay |
| 960-0507 | Detector Control Service Manual | ** | Service manual | Amazon eBay $49.00 |
| FS1216 | Fuel/Water Sep Spin-On | 2 | Fuel filter | Amazon $101.35 eBay $49.99 FridayParts $48.99 |
| LF3325 | Lube, Full-Flow Spin-On | 5 | Oil filter | Amazon $51.99 eBay $229.00 KuduParts $74.00 |
| S-112 | SCREW, HEXAGON HEAD CAP | 12 | Bolt | Amazon Amazon eBay eBay FridayParts $116.02 |
| S-604 | WASHER, LOCK | 12 | Gasket | Amazon eBay |
| S-610 | WASHER, LOCK | 6 | Gasket | Amazon eBay FridayParts $88.56 |
| 130-2981 | Cap. Radiator - 7#PSI | 1 | Service part / kit | Amazon eBay $249.00 |
| 130-3538 | Chemical DCA4 Service Pre-Charging Complete System | 2 | Service part / kit | Amazon eBay |
| 130-3576 | Decal - Ground | 1 | Service part / kit | Amazon eBay |
| 130-3758 | Radiator (includes Cap) | 1 | Service part / kit | Amazon eBay |
| 140-1260 | Fitting, Safety Filter | 2 | Service part / kit | Amazon eBay $116.27 |
| 140-1548 | Indicator, Service | 2 | Service part / kit | Amazon $29.99 eBay $49.99 |
| 140-2098 | Hood, Air Inlet (Includes Mounting Clamp) | 1 | Service part / kit | Amazon eBay |
| 140-2099 | Band | 2 | Service part / kit | Amazon eBay |
| 140-2395 | Tube, Air Inlet | 1 | Service part / kit | Amazon eBay |
| 140-2504-01 | Bracket - Right Side | 1 | Service part / kit | Amazon eBay |
| 140-2504-02 | Bracket - Left Side | 1 | Service part / kit | Amazon eBay |
| 140-2508 | Tube, Air Inlet | 2 | Service part / kit | Amazon eBay |
| 140-2509 | Tube, Air Inlet | 2 | Service part / kit | Amazon eBay |
| 140-2515 | Bracket, Mounting | 1 | Service part / kit | Amazon eBay |
| 140-2519 | Tube, Air Inlet | 2 | Service part / kit | Amazon eBay |
| 140-2521 | Tube, Air Inlet | 2 | Service part / kit | Amazon eBay |
| 140-2528 | Shield | 1 | Service part / kit | Amazon eBay |
| 191-1926-02 | 1 | Service part / kit | Amazon eBay | |
| 3007525 | Liner Kit STD | 1 | Service part / kit | Amazon eBay FridayParts $276.80 |
| 3012611 | Liner Kit +.010" UPF | 1 | Service part / kit | Amazon eBay |
| 3012612 | Liner Kit +.020" UPF | 1 | Service part / kit | Amazon eBay |
| 309-0436 | Switch, Thermostatic - High Water Temperature (PRE-ALARM)(216"F) Switch. Thermostatic - High Water Temperature (SHUTDOWN) | 1 | Service part / kit | Amazon eBay |
| 309-0437 | (222"F) | 1 | Service part / kit | Amazon eBay |
| 309-0635-02 | Valve, Check | 2 | Service part / kit | Amazon eBay |
| 3318201 | Battery Cable Group | 2 | Service part / kit | Amazon eBay |
| 332-2634 | Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper) | 10 | Service part / kit | Amazon eBay |
| 3801268 | Liner Kit +.030" UPF | 1 | Service part / kit | Amazon eBay |
| 501-0558 | Line. Flexible - Bypass | 1 | Service part / kit | Amazon eBay |
| 503-1717 | Elbow, Reducer (45 Deg) (7" ID to 6" ID) | 2 | Service part / kit | Amazon eBay |
| 503-1720 | Insert, Reducer (6" OD to 5-1/2" ID) | 2 | Service part / kit | Amazon eBay |
| 503-1730 | 1 | Service part / kit | Amazon eBay | |
| 505-0017 | Bushing, Pipe – Reducer (3/8" to 1/4") | 2 | Service part / kit | Amazon eBay $99.95 |
| 505-0102 | Filter. Water - W/Corosion Inhibiting | 1 | Service part / kit | Amazon eBay |
| 505-0117 | Bushing, Reducer - Flush, Brass (1/2' NPT x3/8° NPT) | 1 | Service part / kit | Amazon eBay |
| 505-0132 | Nipple, Pipe - Close (3/4 NPT x l-3/8"LG) Elbow. Pipe - 90* (3/4 NPT) | 1 | Service part / kit | Amazon eBay |
| 505-0376 | Elbow – 45 Deg (3/8") | 2 | Service part / kit | Amazon eBay |
| 511-0161-02 | .* | 2 | Service part / kit | Amazon eBay |
| 518-0548-24 | Clamp, Retainer Begin December 1996 Production (Mounted On Top And Side Of Control Box Wrapper On The Side Towards The Control Box Cover) | 20 | Service part / kit | Amazon eBay |
| 518-0548-42 | Clamp, Retainer 4 Prior To December 1996 Production (Mounted On Top And Side Of Control Box Wrapper) | 20 | Service part / kit | Amazon eBay |
| 526-0030 | Washer, Flat (3/8") | 1 | Service part / kit | Amazon eBay |
| 800-0055 | Screw, Cap – Hex Head (3/8–16 x 2-1/4") | 35 | Service part / kit | Amazon eBay |
| 800-0094 | Screw, Cap – Hex Head (1/2–13 x 2") | 1 | Service part / kit | Amazon eBay |
| 821-0029 | Screw, Self–Locking – Hex Washer Head (3/8–16 x 3/4") | 1 | Service part / kit | Amazon eBay |
| 821-0033 | Screw, Self–Locking – Hex Washer Head (7/16–14 x 3/4") | 8 | Service part / kit | Amazon eBay |
| 821-5004-03 | Screw, Self-Locking – Hex Washer Head (3/8–16 x 1") | 2 | Service part / kit | Amazon eBay |
| 870-0281 | Nut, Self-Locking – Hex Washer Head (3/8–16) | 2 | Service part / kit | Amazon eBay |
| 960-0606 | Service part / kit | Amazon eBay | ||
| 960-0608 | Service part / kit | Amazon eBay | ||
| 98-2235 | 1 | Service part / kit | Amazon eBay | |
| 98-4732 | Caution | 1 | Service part / kit | Amazon eBay |
| 98-6108-03 | Decal - Model Identification | 1 | Service part / kit | Amazon eBay |
| 98-6111-03 | ONAN GEN SET CUMMINS GEN SET | 1 | Service part / kit | Amazon eBay |
| 98-6139-03 | CUNMINS ONAN GEN SET | 1 | Service part / kit | Amazon eBay |
| 98-6169 | Terminal Assembly (Includes Replaceable Items 26 thru 29) | 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
Spec sheet — Cummins-1545-C1500-D6KTA50 (Cummins/Onan)Spec sheet — Cummins-C1400D5-Spec-Sheet (Cummins/Onan)Spec sheet — SS16-CPGK (KTA50) (Cummins/Onan)Spec sheet — SS16-CPGK-DC60 (Cummins/Onan)