CAT 1D4540 CAPSCREW for C18 Caterpillar Part - WSTPARTS

The 1D4540 CAPSCREW is a genuine and high-quality OEM replacement part compatible with Caterpillar C18, 3516B and 3512 equipment. It is categorized under Electrical System. Every unit is fitment-verified before dispatch. Manual reference: 3306: BASIC ENGINE, group 138-2780, page 171; 3406C: BASIC ENGINE, group 155-6627, page 276.

1D4540 CAPSCREW for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement CAPSCREW (Part # 1D4540). Designed for CAT C18, 3516B, 3512, 3516C, 3306, 3406C, 3508C, 3512C, 3516, 3606, 3608, 3616, C7, C9, G3608, G3612, G3616 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, 3516B, 3512, 3516C, 3306, 3406C, 3508C, 3512C, 3516, 3606, 3608, 3616, C7, C9, G3608, 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)	1D4540
Product Name	CAPSCREW
Brand	CAT
Applicable Models	C18, 3516B, 3512, 3516C, 3306, 3406C, 3508C, 3512C, 3516, 3606, 3608, 3616, C7, C9, G3608, 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 1D4540 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
3306	BASIC ENGINE	138-2780	p.171
3406C	BASIC ENGINE	155-6627	p.276
3508C	ELECTRICAL AND STARTING SYSTEM	220-2677	p.278
3512	BASIC ENGINE	053-5065	p.49
3512C	ELECTRICAL AND STARTING SYSTEM	261-7305	p.265
3516B	ELECTRICAL AND STARTING SYSTEM	220-2677	p.616
3516C	ELECTRICAL AND STARTING SYSTEM	220-2677	p.404
3606	LUBRICATION SYSTEM	172-8021	p.85

System Notes — BASIC ENGINE

The basic engine group covers the core structure and internals: cylinder block, cylinder head, pistons, rings, liners, connecting rods, crankshaft, bearings, camshaft and the gasket sets that seal them. These parts determine compression, oil pressure and power output. They wear gradually — rings lose tension, bearings show copper, liners glaze — and the first signs are usually blow-by from the breather, rising oil consumption, or a knock that gets louder as the engine warms. Replacing a basic engine part is a planned overhaul decision rather than a roadside fix, so matching the exact part number and serial number range matters more here than anywhere else on the machine.

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.

FAQ

Is 1D4540 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