CAT 2P1286 LOCKNUT for C18 Caterpillar Part - WSTPARTS
2P1286 LOCKNUT is a Bolt/Nut component engineered for Caterpillar C18 and C15 machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: C15: FUEL SYSTEM, group 272-0225, page 298; C18: BASIC ENGINE, group 212-8983, page 160.
2P1286 LOCKNUT for Caterpillar C18 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement LOCKNUT (Part # 2P1286). Designed for CAT C18, C15 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C18, C15
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 2P1286 |
| Product Name | LOCKNUT |
| Brand | CAT |
| Applicable Models | C18, C15 |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 2P1286 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| C15 | FUEL SYSTEM | 272-0225 | p.298 |
| C18 | BASIC ENGINE | 212-8983 | p.160 |
| C15 | FUEL SYSTEM | 287-4962 | p.305 |
| C18 | BASIC ENGINE | 242-0281 | p.166 |
| C15 | FUEL SYSTEM | 269-7000 | p.315 |
| C15 | FUEL SYSTEM | 269-7000 | p.316 |
| C18 | BASIC ENGINE | 243-1020 | p.168 |
| C18 | FUEL SYSTEM | 250-2742 | p.246 |
System Notes — FUEL SYSTEM
The fuel system covers the injection pump, injectors, fuel transfer pump, filters and water separator, lines and the tank. It meters and atomises diesel at the precise moment and quantity the engine needs. Modern CAT engines run very tight injector tolerances, so the group is sensitive to water and dirt: a worn injector dribbles instead of atomising, causing rough idle, white smoke and diluted oil, while a clogged filter starves the pump under load. Parts here are replaced when the engine misfires, smokes, loses power under load, or when the water separator keeps tripping — always after the fuel quality itself has been ruled out.
System Notes — BASIC ENGINE
The basic engine group covers the core structure and internals: cylinder block, cylinder head, pistons, rings, liners, connecting rods, crankshaft, bearings, camshaft and the gasket sets that seal them. These parts determine compression, oil pressure and power output. They wear gradually — rings lose tension, bearings show copper, liners glaze — and the first signs are usually blow-by from the breather, rising oil consumption, or a knock that gets louder as the engine warms. Replacing a basic engine part is a planned overhaul decision rather than a roadside fix, so matching the exact part number and serial number range matters more here than anywhere else on the machine.
FAQ
Is 2P1286 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT C18.
Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
