CAT 5P4116 WASHER for 345C Caterpillar Part - WSTPARTS

5P4116 WASHER is a Bolt/Nut component engineered for Caterpillar 345C, C18 and 3516B machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3126B: COOLING SYSTEM, group 208-3038, page 401; 325C: FUEL SYSTEM, group 183-2860, page 139.

5P4116 WASHER for Caterpillar 345C — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement WASHER (Part # 5P4116). Designed for CAT 345C, C18, 3516B, 336D, 3516C, 3126B, 325C, 325D, 3306, 330C, 330D, 3406C, 3412C, 345B, 3508C, 3512, 3512C, 3516, 365B, C13, C15, C175, C27, C32, C7, C9, 320C, 320D, 345D equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 345C, C18, 3516B, 336D, 3516C, 3126B, 325C, 325D, 3306, 330C, 330D, 3406C, 3412C, 345B, 3508C, 3512, 3512C, 3516, 365B, C13, C15, C175, C27, C32, C7, C9, 320C, 320D, 345D
• ✔ 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)	5P4116
Product Name	WASHER
Brand	CAT
Applicable Models	345C, C18, 3516B, 336D, 3516C, 3126B, 325C, 325D, 3306, 330C, 330D, 3406C, 3412C, 345B, 3508C, 3512, 3512C, 3516, 365B, C13, C15, C175, C27, C32, C7, C9, 320C, 320D, 345D
Weight	0.05 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 5P4116 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
3126B	COOLING SYSTEM	208-3038	p.401
325C	FUEL SYSTEM	183-2860	p.139
3306	ELECTRICAL AND STARTING SYSTEM	125-9775	p.1167
330C	FRAME AND BODY	168-1550	p.378
330D	ELECTRICAL AND STARTING SYSTEM	251-0618	p.137
336D	ELECTRICAL AND STARTING SYSTEM	231-1771	p.152
3406C	LUBRICATION SYSTEM	109-1532	p.435
3412C	COOLING SYSTEM	170-8441	p.278

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.

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.

FAQ

Is 5P4116 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 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