CAT 3N5979 SWITCH for C18 Caterpillar Part - WSTPARTS

Need a dependable Switch/Relay part for your Caterpillar C18, G3508 and 3412C machine? The 3N5979 SWITCH from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Switch/Relay. Every unit is fitment-verified before dispatch. Manual reference: 3306: OPERATOR STATION, group 103-4773, page 1766; 3412C: OPERATOR STATION, group 154-1703, page 658.

3N5979 SWITCH for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement SWITCH (Part # 3N5979). Designed for CAT C18, G3508, 3412C equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, G3508, 3412C
• ✔ 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)	3N5979
Product Name	SWITCH
Brand	CAT
Applicable Models	C18, G3508, 3412C
Weight	0.23 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 3N5979 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	OPERATOR STATION	103-4773	p.1766
3412C	OPERATOR STATION	154-1703	p.658
C18	OPERATOR STATION	235-9566	p.395
G3508	ELECTRICAL AND STARTING SYSTEM	114-8140	p.571
3412C	OPERATOR STATION	154-1701	p.663
G3508	ELECTRICAL AND STARTING SYSTEM	114-8140	p.575
3412C	OPERATOR STATION	154-1697	p.665
G3508	ELECTRICAL AND STARTING SYSTEM	114-8140	p.579

System Notes — OPERATOR STATION

The operator station covers the cab structure, seat and suspension, glass, wipers, door hardware, pedals, joysticks, armrests, HVAC ducting and the interior trim. It is the group that decides how tolerable a ten-hour shift feels. Wear here is driven by daily entry and exit, sun exposure and dust: seat suspensions sag, door struts lose charge, wiper linkages seize, and rubber seals harden until the cab leaks in rain. Parts in this group are replaced when a control feels vague, a latch no longer holds, or the cab no longer keeps dust and water out — small items, but the ones operators complain about first.

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 3N5979 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