CAT 6V7981 BOLT for 345B Caterpillar Part - WSTPARTS
6V7981 BOLT is a Bolt/Nut component engineered for Caterpillar 345B, 365B and 330C machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 330C: FUEL SYSTEM, group 191-3517, page 149; 330D: FUEL SYSTEM, group 258-8745, page 108.
6V7981 BOLT for Caterpillar 345B — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement BOLT (Part # 6V7981). Designed for CAT 345B, 365B, 330C, 325D, 330D equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345B, 365B, 330C, 325D, 330D
- ✔ 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) | 6V7981 |
| Product Name | BOLT |
| Brand | CAT |
| Applicable Models | 345B, 365B, 330C, 325D, 330D |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 6V7981 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 |
| 330C | FUEL SYSTEM | 191-3517 | p.149 |
| 330D | FUEL SYSTEM | 258-8745 | p.108 |
| 336D | FUEL SYSTEM | 258-8745 | p.138 |
| 345B | AIR INLET AND EXHAUST SYSTEM | 116-5405 | p.112 |
| 365B | AIR INLET AND EXHAUST SYSTEM | 116-5405 | p.93 |
| C13 | BASIC ENGINE | 259-1898 | p.247 |
| C175 | BASIC ENGINE | 274-7697 | p.177 |
| C32 | BASIC ENGINE | 359-4872 | p.91 |
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 — AIR INLET AND EXHAUST SYSTEM
The air inlet and exhaust system covers the air cleaner housing and elements, intake piping, turbocharger, aftercooler, exhaust manifold, turbo mounting hardware and gaskets. It delivers clean, dense air and carries hot gas away. On this group, the two dominant failures are dust ingress and heat cycling: a leaking intake joint lets unfiltered air straight into the cylinders and dusts the rings in a few hundred hours, while exhaust manifold and turbo flange gaskets crack from repeated heat cycles and start whistling or sooting. Parts are replaced when boost drops, the intake tract shows dust trails past the filter, or a soot streak appears at a joint.
FAQ
Is 6V7981 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 345B.
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
