Service parts for the C1250 D2R
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
| Fuel | diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 1120 kW |
| Standby kVA | 1400 |
| Prime power | 1006 kW |
| Emissions | U/R |
| Controller | PCC3.3 MLD, PowerCommand 3.3 |
| Oil capacity | 50.0 L |
| Alternator | P7B |
| Voltage options | 255/440 V, 240/416 V, 230/400 V, 220/380 V, 277/480 V |
| Phase | A (U), B (V), C (W) |
| Battery voltage | 24 V |
| Battery quantity | 2 |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 6×2×2 mm |
| Dry weight | 16879 kg |
| Sound level | 83.0 dBA @ 7 m |
| Fuel tank | 68000.0 L |
| Tank runtime | 5 hr |
Engine
| Oil capacity | 177.0 L |
|---|---|
| Coolant capacity | 161.0 L |
| Displacement | 50.0 L |
| Aspiration | Turbocharged - Aftercooled |
| Rated speed | 1800 rpm |
Same engine, other brands
1 brandThe KTA50 G3 in this set also powers 3 generator sets sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Katolight | D1250FNZ4, D1250FRZ4, D1250FSZ4 |
Maintenance & consumables
for the KTA50 G3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Cleaner - Throwaway Type | 140-2098 | Amazon eBay | ||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | ×4 | — | |||
| Belt | Decal - Caution Fan Drive & Lube Components Group Belt. | 98-5347 | Amazon eBay | ||
| Coolant | 440.0 l | — | |||
| Oil | 177.0 l | — | |||
| Spark plug | — |
Common questions
How many kW is the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R is rated 1120 kW standby (1400.0 kVA).
Which engine powers the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R is powered by the KTA50 G3 engine.
What fuel does the Cummins/Onan C1250 D2R use?
The Cummins/Onan C1250 D2R runs on diesel.
What's the oil capacity on a Cummins/Onan C1250 D2R?
The None KTA50 G3 engine in the Cummins/Onan C1250 D2R has an oil capacity of 177.0 liters.
What is the coolant capacity of the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R cooling system holds 161 liters (42.5 US gallons) for the engine, per the manufacturer specification sheet.
What is the continuous rating of the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R is rated 1006 kW prime (1258 kVA), against 1120 kW standby.
What is the sound level of the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R is rated at 83.0 dBA at 7 m, per the manufacturer specification sheet.
How much does the Cummins/Onan C1250 D2R weigh?
The Cummins/Onan C1250 D2R has a dry weight of 16879 kg (37211 lb).
What size fuel tank does the Cummins/Onan C1250 D2R have?
The Cummins/Onan C1250 D2R has a 68000 liter (17964 US gallon) fuel tank, giving about 5 hours of runtime.
What voltages is the Cummins/Onan C1250 D2R available in?
The Cummins/Onan C1250 D2R is offered in 255/440 V, 240/416 V, 230/400 V, 220/380 V, 277/480 V, A (U), B (V), C (W)-phase.
What battery does the Cummins/Onan C1250 D2R use?
The Cummins/Onan C1250 D2R uses 2 batteryies, 24 V each, per the manufacturer specification sheet.
What alternator comes on the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R uses a P7B alternator.
What air filter fits the Cummins/Onan C1250 D2R?
The Cummins/Onan C1250 D2R uses air filter part number 140-2098.
Parts
109| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 122-0757 | Filter. Water - W/Corosion Inhibiting Chemical | Filter | Amazon eBay | |
| 140-2096 | Element, Primary (Outer) | 2 | Air filter | Amazon eBay |
| 140-2098 | Air Cleaner - Throwaway Type | 1 | Air filter | Amazon eBay |
| 140-2467 | Element, Safety (Inner) | 2 | Air filter | Amazon eBay |
| 149-2232 | Starter - 24 VDC | 3 | Starter | Amazon eBay |
| 193-0244 | Sender, Pressure - 0i1 | 1 | Sensor | Amazon eBay |
| 193-0375 | # Sender, Water Temperature | 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 |
| 338-2529 | Harness. Wiring | 1 | Harness | Amazon eBay |
| 338-2925 | Hose, Radiator | 1 | Hose | Amazon eBay |
| 503-0183 | Clamp, Hose | 1 | 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 |
| 508-0292 | Washer, Sealing - Copper | 1 | Seal | Amazon eBay |
| 98-5347 | Decal - Caution Fan Drive & Lube Components Group Belt. | 2 | Belt | Amazon eBay |
| 98-5759 | Drive - Multi Groove Hose, Flexible - Lube (Grease) | 1 | Hose | Amazon eBay |
| 98-5842 | Clamp, Hose - T-Bolt Type (3.5" NON) | 1 | Hose | Amazon eBay |
| HCI634K | Alternator Model | 1 | Alternator | Amazon eBay |
| PI144D1 | Alternator Model | 1 | Alternator | Amazon eBay |
| UC224C | Alternator Model | 1 | Alternator | Amazon eBay |
| UC224E | Alternator Model | 1 | Alternator | Amazon eBay |
| UC274C | Alternator Model | 1 | Alternator | Amazon eBay $8681.95 |
| UC274F | Alternator Model | 1 | Alternator | Amazon eBay |
| UC274H | Alternator Model | 1 | Alternator | Amazon eBay |
| UC274K | Alternator Model | 1 | Alternator | Amazon eBay |
| 016-40820 | Harness, Wiring (Includes Cable Ties and Terminals) | 17 | Service part / kit | Amazon eBay |
| 102-1335 | Plug, Oil Drain | 1 | Service part / kit | Amazon eBay |
| 140-2097 | Cleaner, Air (Includes Elements) | 1 | Service part / kit | Amazon eBay FridayParts $856.89 |
| 300-2856 | Board Assy, Printed Circuit | 1 | Service part / kit | Amazon eBay |
| 300-2863 | Board Assy, Printed Circuit - Relay Assembly- (A14) | 1 | Service part / kit | Amazon eBay |
| 301-9054-01 | Decal - Panel Front Markings (Control With Meters) | 1 | Service part / kit | Amazon eBay |
| 301-9054-02 | Clip - Fastener | 1 | Service part / kit | Amazon eBay |
| 301-9054-03 | Clip - Fastener | 1 | Service part / kit | Amazon eBay |
| 302-1720 | Meter, Frequency (M23) | 1 | Service part / kit | Amazon eBay |
| 302-1753 | Ammeter (M22) See Current Transformer & Ammeter Installation Figure for Parts) | 1 | Service part / kit | Amazon eBay |
| 302-1800 | Ammeter (M22) Scale in Amps as Indicated 0-2000/0-4000 (600 VAC Application) 0-3000/0-6000 (120-480 VAC Application) | 1 | Service part / kit | Amazon eBay |
| 302-1908 | Screw. Cap - Hex Head (M8-1.25 x 35MM) | 2 | Service part / kit | Amazon eBay |
| 305-0813-01 | Battery charger, Onan, 120V, 375W | Service part / kit | eBay $520.00 | |
| 305-0818-02 | EOOO-21002 | 1 | Service part / kit | Amazon eBay |
| 307-1056 | Relay. 24 VDC | 3 | Service part / kit | Amazon eBay $49.00 |
| 307-1987 | 2 307-1056 3 3 815-0388 6 4 323-0804 3 5 815-0544 3 6 319-0447 1 7 NOTE 1 REF 8 NOTE 2 | 6 | Service part / kit | Amazon eBay |
| 308-0882 | Decal - Panel Front Markings (Control Without Meters) | 1 | Service part / kit | Amazon eBay |
| 309-0436 | Decal - Model Identification ONAN GEN SET CUMMINS GEN SET CUMMINS ONAN GEN SET | 1 | Service part / kit | Amazon eBay |
| 309-0437 | (222"F) | 1 | Service part / kit | Amazon eBay |
| 319-0447 | Screw. Machine - Pan Head. Cross-Recessed Drive (#6-32 x 1/2") | 1 | Service part / kit | Amazon eBay |
| 319-0754 | Tie. Cable | 1 | Service part / kit | Amazon eBay |
| 322-0363 | Component 322-0363 | 1 | Service part / kit | Amazon eBay |
| 323-0804 | Screw. Machine - Round Head with IT Lock Washer (#6-32 x 1/2") | 3 | Service part / kit | Amazon eBay |
| 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 |
| 332-0052 | Clamp, Loop | 1 | Service part / kit | Amazon eBay |
| 332-0607 | Block, Terminal (T81) | 1 | Service part / kit | Amazon eBay |
| 332-1279 | Terminal. Lug - Ring (3/8 | 6 | Service part / kit | Amazon eBay |
| 332-1292 | Terminal Board (Includes Parts Marked #) | 1 | 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 |
| 332-1673 | Terminal, Wire - Spade | 2 | Service part / kit | Amazon eBay |
| 332-2634 | Clamp, Hose | 1 | Service part / kit | Amazon eBay |
| 332-2723 | Strip. Marker | 1 | Service part / kit | Amazon eBay |
| 338-1835 | Harness, Wiring (A13 to A l l ) | 1 | Service part / kit | Amazon eBay |
| 338-1836 | Harness, Wiring (A14 to All) (Relays) | 1 | Service part / kit | Amazon eBay |
| 338-1904 | Harness. Wiring (A15 to All) | 1 | Service part / kit | Amazon eBay |
| 338-2278 | Harness. Wiring - AC (Includes Terminal Block & Cable Ties) [Used only with meters] | 1 | Service part / kit | Amazon eBay $77.00 |
| 338-2532 | Terminal. Lug - Forked (No. 6 Screw) | 4 | Service part / kit | Amazon eBay |
| 355-0093 | Voltmeter (M21) Dual Scale 0-300/0-600V Single Scale 0-750V | 1 | Service part / kit | Amazon eBay |
| 406-0333 | Component 406-0333 | 2 | Service part / kit | Amazon eBay |
| 406-0334 | Clip, Retaining - Turnbutton Fastener | 2 | Service part / kit | Amazon eBay |
| 501-0520 | Screw, Cap - Hex Head (3/8-24 x 5/8") | 1 | Service part / kit | Amazon eBay |
| 501-0524 | Washer, Lock - EIT (3/8") | 1 | Service part / kit | Amazon eBay |
| 504-0028 | Valve, Radiator Drain | 1 | Service part / kit | Amazon eBay |
| 505-0007 | Belt. Drive - Multi Groove (Used with 35 A MP Alternator * Pulley, Alternator - Multi Groove (Use with 75 A MP Alternator) | 2 | Service part / kit | Amazon eBay |
| 505-0021 | Bushing, Pipe - Reducer (3/4º to 1/2º) | 1 | Service part / kit | Amazon eBay |
| 505-0100 | Nipple, Pipe - Close (1/2”) | 1 | Service part / kit | Amazon eBay $9.34 |
| 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 |
| 508-0015 | Washer, Insulating - Fiber (#8) | 1 | Service part / kit | Amazon eBay |
| 517-0131 | Capacitor (Used across Voltmeter Terminals on some Sets) | 1 | Service part / kit | Amazon eBay |
| 800-0062 | Nut, Insulated | 1 | Service part / kit | Amazon eBay |
| 800-0270 | DCA4 Service Pre-Charging Complete System | 1 | Service part / kit | Amazon eBay |
| 800-2060 | Screw, Cap - Hex Head (M8x 1.25 x35) | 1 | Service part / kit | Amazon eBay |
| 809-0035 | Screw, Machine - Thread Cutting, Round Head (#8 X 3/4') | 1 | Service part / kit | Amazon eBay |
| 812-0063 | 853-0003 300-2856 338-1836 812-0063 853-0003 300-2863 338-1835 332-1445 NOTE 1 NOTE 2 332 | 2 | Service part / kit | Amazon eBay |
| 812-0065 | Screw, Machine - Round Head (#6 - 32 x 5/8') | 2 | Service part / kit | Amazon eBay |
| 812-0084 | Screw. Machine - Round Head ( | 4 | Service part / kit | Amazon eBay |
| 815-0388 | Bracket. Mounting - Relay Lead(s), Electrical Wire, Electrical - 20 AW G, Insulated Terminal, Wire - Forked, 18-20 Gauge | 6 | Service part / kit | Amazon eBay |
| 815-0544 | Screw, Machine - Round Head IT Washer (#6 - 32 x 1/2') | 3 | Service part / kit | Amazon eBay |
| 821-0004 | Screw, Self-Locking - Hex | 4 | Service part / kit | Amazon eBay |
| 850-0050 | Washer, Lock - Spring (3/8”) | 2 | Service part / kit | Amazon eBay |
| 853-0003 | Washer, Lock - ET (#6) | 4 | Service part / kit | Amazon eBay |
| 856-0008 | Washer, Lock - EIT (5/16'1) | 1 | Service part / kit | Amazon eBay |
| 856-0010 | Washer, Lock - EIT (3/8') | 1 | Service part / kit | Amazon eBay |
| 870-0131 | Nut. Hex - with ET (#10-32) | 1 | Service part / kit | Amazon eBay |
| 870-0196 | Nut, Insulating (#8) | 1 | Service part / kit | Amazon eBay |
| 98-4732 | Caution | 1 | Service part / kit | Amazon eBay |
| 98-4798 | Decal - Caution "7# PSI HOT WATER SYSTEM" | 1 | Service part / kit | Amazon eBay |
| 98-5298 | Decal - Panel Rear Markings (All Control Panels) | 1 | Service part / kit | Amazon eBay |
| 98-5299 | Decal - Panel Rear Markings (All Control Panels) | 1 | Service part / kit | Amazon eBay |
| 98-5316 | Decal - Panel Rear Markings (All Control Panels) | 1 | Service part / kit | Amazon eBay |
| 98-5387 | Nut, Self-Locking - with ET Lockwasher (#10-32) | 1 | Service part / kit | Amazon eBay |
| 98-5393 | Screw, Tapping - Round Head (#8 x 3/4") | 2 | Service part / kit | Amazon eBay |
| 98-5822 | Bushing, Reducer - Flush (1/2 NPT x 3/8 NPT) | 3 | 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 | CUMMINS 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 |
| F-2375 | A single line drawing of the prime power system | Service part / kit | Amazon eBay | |
| V2403-M-E3BG | Engine Model | 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 — EMERS-5884-EN (Cummins/Onan)Spec sheet — GLSB-5833-ENReference — 6 June 2018 - Mining - Madagascar Ambatovy ProjectParts manual — F-1335-European-Rental-EN (Cummins/Onan)
This page was generated from the 4 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.