CAT 8H2778 GASKET for C18 Caterpillar Part - WSTPARTS
8H2778 GASKET is a Drivetrain component engineered for Caterpillar C18, 3516B and C15 machines, built to match original factory specifications. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 3306: FUEL SYSTEM, group 137-5541, page 798; 3512: FUEL SYSTEM, group 169-8612, page 634.
8H2778 GASKET for Caterpillar C18 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement GASKET (Part # 8H2778). Designed for CAT C18, 3516B, C15, 3516C, 3306, 3512, 3516 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C18, 3516B, C15, 3516C, 3306, 3512, 3516
- ✔ 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) | 8H2778 |
| Product Name | GASKET |
| Brand | CAT |
| Applicable Models | C18, 3516B, C15, 3516C, 3306, 3512, 3516 |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 8H2778 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 |
| 3306 | FUEL SYSTEM | 137-5541 | p.798 |
| 3512 | FUEL SYSTEM | 169-8612 | p.634 |
| 3516 | FUEL SYSTEM | 175-5207 | p.366 |
| 3516B | FUEL SYSTEM | 241-2738 | p.389 |
| 3516C | FUEL SYSTEM | 241-2738 | p.323 |
| C15 | FUEL SYSTEM | 141-8954 | p.760 |
| C18 | FUEL SYSTEM | 225-8575 | p.600 |
| 3306 | FUEL SYSTEM | 137-5541 | p.799 |
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 — SERVICE EQUIPMENT AND SUPPLIES
This group covers the equipment and consumables used to service the machine rather than to run it: filter wrenches and service tools, drain and fill hardware, grease fittings and couplers, sight gauges, sampling valves, and the small hardware that makes routine maintenance possible without improvising. Items here are replaced when they no longer seal, no longer hold a setting, or when a stripped fitting turns a ten-minute service job into a two-hour one. Keeping the correct part number on hand matters more than the unit price, because a missing grease coupler usually means a missed lube point.
FAQ
Is 8H2778 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
