CAT 8T4187 BOLT for 345C Caterpillar Part - WSTPARTS
The 8T4187 BOLT is a genuine and high-quality OEM replacement part compatible with Caterpillar 345C and 365B equipment. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 345C: FUEL SYSTEM, group 223-2971, page 128; 3516B: COOLING SYSTEM, group 312-5105, page 270.
8T4187 BOLT for Caterpillar 345C — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement BOLT (Part # 8T4187). Designed for CAT 345C, 365B, 345D equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345C, 365B, 345D
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 8T4187 |
| Product Name | BOLT |
| Brand | CAT |
| Applicable Models | 345C, 365B, 345D |
| Weight | 0.32 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 8T4187 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 |
| 345C | FUEL SYSTEM | 223-2971 | p.128 |
| 3516B | COOLING SYSTEM | 312-5105 | p.270 |
| 365B | FUEL SYSTEM | 138-5277 | p.113 |
| C27 | COOLING SYSTEM | 349-2574 | p.126 |
| 345C | HYDRAULIC SYSTEM | 227-0430 | p.403 |
| 365B | FUEL SYSTEM | 138-5277 | p.114 |
| 345C | HYDRAULIC SYSTEM | 255-1810 | p.404 |
| 365B | HYDRAULIC SYSTEM | 138-5341 | p.359 |
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 — COOLING SYSTEM
The cooling system covers the radiator, water pump, thermostat, fan and fan drive, coolant hoses, clamps, the surge tank and the belts that drive it. It holds engine temperature inside the range where clearances and oil film stay correct. Failures are usually slow and then sudden: a hose softens and balloons before it bursts, a water pump seal starts weeping from the weep hole, a thermostat sticks partly open so the engine runs cold and burns more fuel. On construction sites the radiator also packs with dust and debris, which raises pressure across the core and finds the weakest hose or clamp first.
FAQ
Is 8T4187 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 345C.
Genuine CAT vs direct replacement — what is the difference?
Genuine CAT covers three factory lines: New Genuine, Cat Reman (core exchange with core charge) and Cat Classic (brand-new economy line). OEM-equivalent direct replacements are non-CAT parts; grade and warranty are confirmed in the quotation.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
