CAT 4M5281 BOLT for C18 Caterpillar Part - WSTPARTS

Need a dependable Bolt/Nut part for your Caterpillar C18, 3516B and C15 machine? The 4M5281 BOLT from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3126B: ELECTRICAL AND STARTING SYSTEM, group 107-7977, page 497; 3306: FUEL SYSTEM, group 131-5454, page 656.

4M5281 BOLT for Caterpillar C18 — Genuine CAT & Replacement Part

WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement BOLT (Part # 4M5281). Designed for CAT C18, 3516B, C15, 3126B, 3306, 3406E, 3412C, 3508C, 3512, 3512C, C13, C175, C7, C9, G3608, G3616 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, 3516B, C15, 3126B, 3306, 3406E, 3412C, 3508C, 3512, 3512C, C13, C175, C7, C9, G3608, G3616
• ✔ 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)	4M5281
Product Name	BOLT
Brand	CAT
Applicable Models	C18, 3516B, C15, 3126B, 3306, 3406E, 3412C, 3508C, 3512, 3512C, C13, C175, C7, C9, G3608, G3616
Weight	0.05 kg
Condition	New (Genuine CAT / OEM-equivalent direct replacement)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 4M5281 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	107-7977	p.497
3306	FUEL SYSTEM	131-5454	p.656
3406E	ELECTRICAL AND STARTING SYSTEM	131-8284	p.369
3412C	GENERATORS	143-9520	p.823
3508C	FUEL SYSTEM	246-0455	p.259
3512	COOLING SYSTEM	328-1424	p.648
3512C	SERVICE EQUIPMENT AND SUPPLIES	121-9272	p.446
3516B	COOLING SYSTEM	032-1268	p.314

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 4M5281 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 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