Service parts for the 1120 DFLC
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 |
| Prime power | 1120 kW |
| Controller | 3100, PCC PowerCommand, PowerCommand 2100 |
| Oil capacity | 177.0 L |
| Phase | 1 or 3 |
| Battery voltage | 24 V |
| Coolant capacity | 351 L |
| Max ambient | 40 °C |
| Dry weight | 10300 kg |
| Fuel tank | 2000.0 L |
Engine
| Oil capacity | 204.0 L |
|---|---|
| Coolant capacity | 400.0 L |
| Displacement | 50.0 L |
| Aspiration | Turbocharged |
| Rated speed | 1500 rpm |
Filters for the Cummins/Onan KTA50-G3
4Engine-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 | P551670 | Lube Filter, Spin-On Full Flow | CUMMINS 298670, CUMMINS 299670, NAPA 1970, CARBOCOL 0026 | FridayParts $26.68 |
| Oil filter | P550777 | Lube Filter, Spin-On Bypass | CUMMINS 3021658, CUMMINS 33004232, NAPA 1749, BALDWIN B7577 | FridayParts $43.56 |
| Fuel filter | P550105 | Fuel Filter, Spin-On Primary | CUMMINS 154700, CUMMINS 154710, NAPA 3109, NAPA 3405 | buy |
| Fuel / water separator | P552216 | Fuel Filter, Water Separator Spin-On Twist&Drain | CUMMINS 3309437, CUMMINS 3313304, NAPA 3613, BALDWIN BF1216 | buy |
Same engine, other brands
2 brandsThe Cummins/Onan KTA50-G3 in this set also powers 4 generator sets sold under 2 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Katolight | D1250FNZ4, D1250FRZ4, D1250FSZ4 |
| Everdigm | EDG-1250C |
Maintenance & consumables
for the Cummins/Onan 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
What is the power rating of the Cummins/Onan 1120 DFLC?
The Cummins/Onan 1120 DFLC is rated 1120 kW standby.
Which engine powers the Cummins/Onan 1120 DFLC?
The Cummins/Onan 1120 DFLC is powered by the Cummins/Onan KTA50-G3 engine.
What kind of fuel does the Cummins/Onan 1120 DFLC run on?
The Cummins/Onan 1120 DFLC runs on Diesel.
What's the oil capacity on a Cummins/Onan 1120 DFLC?
The Cummins/Onan KTA50-G3 engine in the Cummins/Onan 1120 DFLC has an oil capacity of 204.0 liters.
What is the cooling system capacity of the Cummins/Onan 1120 DFLC?
The Cummins/Onan 1120 DFLC cooling system holds 351 liters (92.7 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
How much does the Cummins/Onan 1120 DFLC weigh?
The Cummins/Onan 1120 DFLC has a dry weight of 10300 kg (22707 lb).
How big is the fuel tank on the Cummins/Onan 1120 DFLC?
The Cummins/Onan 1120 DFLC has a 2000 liter (528 US gallon) fuel tank.
What air filter does the Cummins/Onan 1120 DFLC use?
The Cummins/Onan 1120 DFLC uses air filter part number 140-2098.
Troubleshooting
6Fault codes
| Code | Meaning |
|---|---|
| 121 | Speed Signal Lost |
| 135 | Oil Pressure Sensor High |
| 141 | Oil Pressure Sensor Low |
| 143 | Pre-Low Oil Pressure Sensor |
| 144 | Coolant Temperature Sensor High |
| 145 | Coolant Temperature Sensor Low |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan 1120 DFLC troubleshooting guide (53 entries) →
Parts
138| 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, Oil Pressure (E1) | 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 |
| 3375004 | Dial Indicator Kit for injector and valve adjustment | Injector | eBay | |
| 338-2529 | Harness. Wiring | 1 | Harness | Amazon eBay |
| 338-2925 | Hose, Radiator | 1 | Hose | Amazon eBay |
| 3822575 | Injector and valve adjustment kit | 1 | Injector | Amazon eBay FridayParts $96.36 |
| 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 |
| FP-3053124 | Injector Assembly, PTK (New) | Injector | eBay | |
| M-4352581 | Upper Gasket Set | Gasket | 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 |
| 3096680 | Piston STC 13.8:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $267.09 FridayParts $1085.70 |
| 3096681 | Piston KT Series 15.5:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $277.52 FridayParts $209.79 |
| 3096682 | Piston KTA Series 14.5:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $273.70 FridayParts $214.73 |
| 3096683 | Piston 13.5:1 Ratio | 1 | Service part / kit | Amazon eBay |
| 3096684 | Piston KTA 15.7:1 Ratio | 1 | Service part / kit | Amazon eBay $223.80 |
| 3096685 | Piston STC 13.9:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $270.94 FridayParts $192.55 |
| 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 | Sender, Pressure - Oil (E123) | 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 |
| 3375005 | Dial indicator extension | Service part / kit | eBay | |
| 3375007 | Support Plate / Support Block for dial indicator | Service part / kit | 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 |
| 3628731 | Piston STC Kit | 1 | Service part / kit | Amazon eBay |
| 3630913 | Piston KTA-50-G7 | 1 | Service part / kit | Amazon eBay |
| 3631241 | Piston Kit STC 13.9:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $316.30 FridayParts $264.60 |
| 3631242 | Piston Kit 13.5:1 Ratio | 1 | Service part / kit | Amazon eBay |
| 3631243 | Piston Kit KTA 15.7:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $307.04 |
| 3631244 | Piston Kit KTA Series 14.5:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $317.90 FridayParts $228.99 |
| 3631245 | Piston Kit KT Series 15.5:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $307.59 FridayParts $209.79 |
| 3631246 | Piston Kit STC 13.8:1 Ratio | 1 | Service part / kit | Amazon eBay NAPA $313.23 FridayParts $199.99 |
| 3803530 | Piston Assembly STC | 1 | Service part / kit | Amazon eBay FridayParts $25.89 |
| 3804747 | Piston Kit KTA-50-G7 | 1 | Service part / kit | Amazon eBay |
| 3804885 | Piston KTA-50-G8/G9 | 1 | Service part / kit | Amazon eBay NAPA $435.16 FridayParts $265.56 |
| 406-0333 | Component 406-0333 | 2 | Service part / kit | Amazon eBay |
| 406-0334 | Clip, Retaining - Turnbutton Fastener | 2 | Service part / kit | Amazon eBay |
| 4089847 | Piston Kit GTA38/19 | 1 | Service part / kit | Amazon eBay |
| 4090013 | Piston Kit KTA-38-M2 | 1 | Service part / kit | Amazon eBay |
| 4090029 | Piston Kit QSK19CE | 1 | Service part / kit | Amazon eBay |
| 4090181 | Piston GTA38/19 | 1 | Service part / kit | Amazon eBay |
| 4097889 | Piston KTA-38-M2 | 1 | Service part / kit | Amazon eBay |
| 4910463 | Piston QSK19R/M | 1 | Service part / kit | Amazon eBay |
| 4910465 | Piston QSK Series | 1 | Service part / kit | Amazon eBay FridayParts $1134.77 |
| 4916177 | Piston GTA/GQSK19 | 1 | Service part / kit | Amazon eBay |
| 4918058 | Piston QSK19CE | 1 | Service part / kit | Amazon eBay |
| 4922319 | Piston QSK19C | 1 | Service part / kit | Amazon eBay |
| 4955233 | Piston Kit QSK19R/M | 1 | Service part / kit | Amazon eBay |
| 4955235 | Piston Kit QSK Series | 1 | Service part / kit | Amazon eBay FridayParts $1134.77 |
| 4955236 | Piston Kit QSK19C | 1 | Service part / kit | Amazon eBay |
| 4955238 | Piston Kit GTA/GQSK19 | 1 | 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 | |
| M-3804747 | Piston Kit | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 100% | 289.0 | 75.34 |
Available documents
Spec sheet — 1340 DFLE (Cummins/Onan)Parts manual — Cummins-DFLB-DFLC-DFLE-generator-set-parts-manual (Cummins/Onan)
This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.