CAT 0S1566 CAPSCREW for C18 Caterpillar Part - WSTPARTS

0S1566 CAPSCREW is a Electrical System component engineered for Caterpillar C18, 3516B and C15 machines, built to match original factory specifications. It is categorized under Electrical System. Every unit is fitment-verified before dispatch. Manual reference: 3126B: AIR INLET AND EXHAUST SYSTEM, group 209-5356, page 407; 3306: BASIC ENGINE, group 111-1810, page 143.

0S1566 CAPSCREW for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement CAPSCREW (Part # 0S1566). Designed for CAT C18, 3516B, C15, 3516C, 3126B, 3306, 3406E, 3412C, 3508C, 3512, 3512C, 3516, C27, C32, C9, G3508, G3608, G3612, G3616 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, 3516B, C15, 3516C, 3126B, 3306, 3406E, 3412C, 3508C, 3512, 3512C, 3516, C27, C32, C9, G3508, 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)	0S1566
Product Name	CAPSCREW
Brand	CAT
Applicable Models	C18, 3516B, C15, 3516C, 3126B, 3306, 3406E, 3412C, 3508C, 3512, 3512C, 3516, C27, C32, C9, G3508, G3608, G3612, G3616
Weight	0.14 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 0S1566 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	AIR INLET AND EXHAUST SYSTEM	209-5356	p.407
3306	BASIC ENGINE	111-1810	p.143
3406E	LUBRICATION SYSTEM	140-6325	p.227
3412C	BASIC ENGINE	144-7184	p.144
3508C	COOLING SYSTEM	302-5307	p.195
3512	COOLING SYSTEM	107-5565	p.489
3512C	ELECTRICAL AND STARTING SYSTEM	112-6597	p.315
3516	ELECTRICAL AND STARTING SYSTEM	143-5174	p.548

System Notes — AIR INLET AND EXHAUST SYSTEM

The air inlet and exhaust system covers the air cleaner housing and elements, intake piping, turbocharger, aftercooler, exhaust manifold, turbo mounting hardware and gaskets. It delivers clean, dense air and carries hot gas away. On this group, the two dominant failures are dust ingress and heat cycling: a leaking intake joint lets unfiltered air straight into the cylinders and dusts the rings in a few hundred hours, while exhaust manifold and turbo flange gaskets crack from repeated heat cycles and start whistling or sooting. Parts are replaced when boost drops, the intake tract shows dust trails past the filter, or a soot streak appears at a joint.

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.

FAQ

Is 0S1566 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