CAT 9N0937 RECTIFIER for C18 Caterpillar Part - WSTPARTS

9N0937 RECTIFIER 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: 3306: ELECTRICAL AND STARTING SYSTEM, group 331-5717, page 942; 3512: ELECTRICAL AND STARTING SYSTEM, group 172-0258, page 743.

9N0937 RECTIFIER for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement RECTIFIER (Part # 9N0937). Designed for CAT C18, 3516B, C15, 3516C, 3306, 3406E, 3508C, 3512, C13, C7, G3508 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, 3516B, C15, 3516C, 3306, 3406E, 3508C, 3512, C13, C7, G3508
• ✔ 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)	9N0937
Product Name	RECTIFIER
Brand	CAT
Applicable Models	C18, 3516B, C15, 3516C, 3306, 3406E, 3508C, 3512, C13, C7, G3508
Weight	0.14 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 9N0937 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	ELECTRICAL AND STARTING SYSTEM	331-5717	p.942
3512	ELECTRICAL AND STARTING SYSTEM	172-0258	p.743
3516B	ELECTRICAL AND STARTING SYSTEM	276-1307	p.609
3516C	ELECTRICAL AND STARTING SYSTEM	276-1307	p.350
C13	ELECTRICAL AND STARTING SYSTEM	190-8977	p.583
C18	ELECTRICAL AND STARTING SYSTEM	139-6873	p.463
C7	ELECTRICAL AND STARTING SYSTEM	213-4740	p.589
3126B	ELECTRICAL AND STARTING SYSTEM	154-8016	p.475

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 9N0937 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