The Caterpillar C18-C is a 18 L turbocharged engine rated at 2100 rpm. It powers generator sets from Northern Lights, including the M843JK.
Also known as: Caterpillar C18-C
Part of the Caterpillar C18 engine family — 3 variants share parts & fitment.
| Displacement | 18.0 L |
|---|---|
| Aspiration | Turbocharged |
| Rated speed | 2100 rpm |
Compiled from service & troubleshooting documentation across every generator set that uses the Caterpillar C18-C.
| Part # | Description | Category |
|---|---|---|
| 106-3973 | Air filter inner | air_filter |
| 151-7737 | Air Primary | air_filter |
| 189-0202 | Air Secondary | air_filter |
| 1W-3636 | Air Secondary | air_filter |
| 1W-3637 | Air Primary | air_filter |
| 246-5009 | Air | air_filter |
| 246-5010 | Air | air_filter |
| 4N0015 | Air filter outer | air_filter |
| 7C-1571 | Air Primary | air_filter |
| 8N6309 | Air filter outer | air_filter |
| 9Y-3879 | Air | air_filter |
| 6T1395 | Alternator | alternator |
| 118-2018 | V-belt | belt |
| 4N6302 | V-belt | belt |
| M-CK3687817P | Cylinder Kit | cylinder_kit |
| 133-5673 | Fuel/Water Separator | fuel_filter |
| 1R-0749 | Fuel Secondary - ADV | fuel_filter |
| 1R-0762 | Fuel Secondary - ADV | fuel_filter |
| 1R-0770 | Fuel/Water Separator | fuel_filter |
| 1R-0781 | Fuel/Water Separator - ADV | fuel_filter |
| 1R0749 | Filter fuel | fuel_filter |
| 1R0755 | Filter fuel | fuel_filter |
| 326-1641 | Filter water separator | fuel_filter |
| 326-1642 | Filter water separator | fuel_filter |
| 326-1643 | Filter water separator | fuel_filter |
| 3S3875 | Filter fuel | fuel_filter |
| 9N3717 | Filter water separator | fuel_filter |
| 4N1151 | Gasket oil pan | gasket |
| M-4220925 | Gasket Set - Rear Structure | gasket |
| M-4337629 | Gasket Set - Rear Structure | gasket |
| M-4351087 | Gasket Set - Rear Structure | gasket |
| M-4361559 | Gasket Set - Front Structure | gasket |
| M-4365757 | Gasket Set - Turbo Installation | gasket |
| M-4452666 | Gasket Set - Rear Structure | gasket |
| M-4496052 | Gasket Set - Oil Cooler & Lines | gasket |
| M-4588198 | Gasket Set - Front Structure | gasket |
| M-4682161 | Gasket Set - Cylinder Head | gasket |
| M-4685553 | Gasket Set - Central & Lower | gasket |
| M-4685746 | Gasket Set - Cylinder Head | gasket |
| M-4687363 | Gasket Set - Water Pump | gasket |
| M-4687942 | Gasket Set - Turbo Installation | gasket |
| M-4690626 | Gasket Set - Central & Lower | gasket |
| M-4690822 | Gasket Set - Turbo Installation | gasket |
| M-4690823 | Gasket Set - Cylinder Head | gasket |
| M-4690878 | Gasket Set - Cylinder Head | gasket |
| M-4692381 | Gasket Set - Central & Lower | gasket |
| M-4692382 | Gasket Set - Fuel System | gasket |
| M-4692388 | Gasket Set - Cylinder Head | gasket |
| M-4701892 | Gasket Set - Turbo Installation | gasket |
| M-4733264 | Gasket Set - Rear Structure | gasket |
| M-4886213 | Gasket Set - Oil Cooler | gasket |
| M-4916359 | Gasket Set - Turbo Installation | gasket |
| MCB3306031 | MAJOR OVERHAUL GASKET SET | gasket |
| MCB3306032 | GASKET SET | gasket |
| MCB3306033 | CYLINDER HEAD GASKET SET | gasket |
| MCB3306121 | MAJOR OVERHAUL GASKET SET | gasket |
| MCB3306122 | GASKET SET | gasket |
| MCB3306123 | CYLINDER HEAD GASKET SET | gasket |
| M-2572752 | Gasket Set - C18 Front Structure | gasket_set |
| M-3604170 | Gasket Set - C18 Front Structure | gasket_set |
| M-3605916 | Gasket Set - C18 Central & Lower | gasket_set |
| M-4154993 | Gasket Set - Single Cylinder Head - C18 | gasket_set |
| M-4446485 | Gasket Set - C13-C15-C18 Front Structure | gasket_set |
| 126-1815 | Hydraulic - UHE | hydraulic_filter |
| 144-6691 | Hydraulic | hydraulic_filter |
| 1R0774 | Filter hydraulic | hydraulic_filter |
| 328-3655 | Filter hydraulic/transmission | hydraulic_filter |
| 9T0973 | Filter hydraulic/transmission | hydraulic_filter |
| M-2463129 | Impeller – Water Pump | impeller |
| 102-2828 | Filter oil | oil_filter |
| 1R-0716 | Engine Oil | oil_filter |
| 1R-1808 | Engine Oil - ADV | oil_filter |
| 1R0716 | Filter oil | oil_filter |
| 1R1808 | Filter oil | oil_filter |
| 2243245 | Connecting rod | other_service |
| 249-0439 | Oxidation Catalyst Assembly - Round | other_service |
| 256-0331 | Oxidation Catalyst Assembly - Round | other_service |
| 888-983-7847 | ENGINE BLOCK CRANKSHAFT | other_service |
| A100 | Download Specification | other_service |
| M-3687815 | Piston | other_service |
| M-3687816 | Piston | other_service |
| M-CK3687815P | Kit - Cylinder Kit | other_service |
| M-CK3687816P | Kit - Cylinder Kit | other_service |
| R-20R2284 | C15/C18/C27/C32 ACERT Trim file (12-digit serial) | other_service |
| R-20R2285 | C15/C18/C27/C32 ACERT Trim file (12-digit serial) | other_service |
| RSC18E | Ring Set - Piston | other_service |
| RSC18E1 | Ring Set - Piston | other_service |
| g00284658 | Illustration 17 EPA Emissions Certification Film | other_service |
| g00415538 | Illustration 18 European Emissions Certification Film | other_service |
| g00702020 | Wear a hard hat, protective glasses, and other protective equipment, as required. | other_service |
| g00704000 | Illustration 8 | other_service |
| g00704059 | Illustration 9 | other_service |
| g00771448 | Grounding Practices | other_service |
| g01054560 | Illustration 23 Typical performance monitor panel | other_service |
| g01054562 | Illustration 24 Typical performance monitor panel for totals | other_service |
| g01054565 | Illustration 25 Typical performance monitor panel for settings | other_service |
| g01054566 | Illustration 26 Typical performance monitor panel for service | other_service |
| g01065152 | Illustration 16 (1) Serial number plate (2) Information plate | other_service |
| g01233007 | Illustration 20 | other_service |
| g01416712 | Illustration 1 | other_service |
| g01459611 | Illustration 21 | other_service |
| g01459691 | Illustration 22 Caterpillar Messenger Display | other_service |
| i00844066 | Emissions Certification Film | other_service |
| i00863835 | Self-Diagnostics | other_service |
| i00911989 | Before Starting Engine | other_service |
| i01103904 | Engine Starting | other_service |
| i01359666 | Crushing Prevention and Cutting Prevention | other_service |
| i01372247 | Mounting and Dismounting | other_service |
| i01372254 | Fire Prevention and Explosion Prevention | other_service |
| i01463253 | Diagnostic Lamp | other_service |
| i01646248 | SMCS Code: 1000 | other_service |
| i01658146 | Important Safety Information | other_service |
| i01934760 | SMCS Code: 1000; 1401; 1402; 1900 | other_service |
| i01988813 | Product Lifting | other_service |
| i02068367 | Product Storage | other_service |
| i02088692 | Plate Locations and Film Locations | other_service |
| i02109067 | Operation and Maintenance Manual, 'Maintenance Interval Schedule' | other_service |
| i02164876 | Reference Numbers | other_service |
| i02469632 | Electrical System | other_service |
| i02496338 | Diagnostic Flash Code Retrieval | other_service |
| i02566298 | General Hazard Information | other_service |
| i02784356 | Engine Electronics | other_service |
| i02840188 | Safety Messages | other_service |
| i02944987 | Monitoring System | other_service |
| M-3687817 | Piston | piston |
| 138-6744 | Water pump repair kit | pump |
| 161-4113 | Oil pump | pump |
| 336-2213 | Water pump | pump |
| 352-0211 | Water pump | pump |
| 384-8611 | Lift/transfer pump | pump |
| 384-8612 | Lift/transfer pump | pump |
| M-2463130 | Shaft – Water Pump | pump |
| M-2672839 | Water pump repair kit | pump |
| M-3848611 | Pump - Transfer | pump |
| 142-5867 | Front seal | seal |
| 142-5868 | Rear seal | seal |
| M-2454630 | Sensor Assembly - Speed | sensor |
| 247-7133 | Thermostat | thermostat |
| 248-5513 | Thermostat | thermostat |
| 420-5855 | Water Pump Seal Installer (Dimensions: 47 x 45 mm, Weight: .463 kg) | water_pump_seal_installer |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Caterpillar C18-C has a displacement of 18.0 liters.
The Caterpillar C18-C powers 1 generator set(s), including Northern Lights M843JK.
A commonly reported issue on generators using the Caterpillar C18-C is: Warning or shutdown system is activated. Cause: Engine temperature gauge reading above specified threshold. Fix: Check engine temperature, isolate cause using Trouble Shooting Guide, make repairs and restart after cooling.