CAT 4B4274 WASHER for C18 Caterpillar Part - WSTPARTS

The 4B4274 WASHER is a genuine and high-quality OEM replacement part compatible with Caterpillar C18, 3516B and C15 equipment. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3126B: ELECTRICAL AND STARTING SYSTEM, group 134-0597, page 548; 3306: FUEL SYSTEM, group 179-8213, page 717.

4B4274 WASHER for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement WASHER (Part # 4B4274). Designed for CAT C18, 3516B, C15, 3126B, 3306, 3406E, 3412C, 3512, 3512C, 3516, 3606, 3608, 3616, C13, C27, C7, C9, G3508, G3612, G3616 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, 3516B, C15, 3126B, 3306, 3406E, 3412C, 3512, 3512C, 3516, 3606, 3608, 3616, C13, C27, C7, C9, G3508, G3612, G3616
• ✔ 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)	4B4274
Product Name	WASHER
Brand	CAT
Applicable Models	C18, 3516B, C15, 3126B, 3306, 3406E, 3412C, 3512, 3512C, 3516, 3606, 3608, 3616, C13, C27, C7, C9, G3508, G3612, G3616
Weight	0.05 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 4B4274 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	ELECTRICAL AND STARTING SYSTEM	134-0597	p.548
3306	FUEL SYSTEM	179-8213	p.717
3406E	ELECTRICAL AND STARTING SYSTEM	121-7028	p.375
3412C	OPERATOR STATION	240-0166	p.605
3512	ELECTRICAL AND STARTING SYSTEM	100-3638	p.811
3512C	OPERATOR STATION	125-7089	p.363
3516	ELECTRICAL AND STARTING SYSTEM	172-8660	p.603
3516B	FUEL SYSTEM	252-7368	p.377

System Notes — ELECTRICAL AND STARTING SYSTEM

The electrical and starting system covers the battery, starter motor, alternator, wiring harness, relays, switches and the instrument panel. It carries current from the batteries to the starter to crank the engine, and from the alternator back to keep the batteries charged. Because these machines work in dust, vibration and wide temperature swings, connectors corrode, harness insulation chafes against the frame, and starter solenoids burn out from repeated short cranks. Parts in this group are usually replaced on a symptom basis — slow cranking, a dash warning, lights that dim under load, or a no-start condition traced to an open circuit.

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 4B4274 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