CAT 8J4351 SEAL-O-RIN for 345C Caterpillar Part - WSTPARTS

WSTPARTS supplies the 8J4351 SEAL-O-RIN, a CAT Seal replacement part designed for Caterpillar 345C, C18 and 345B applications. It is categorized under Seal. Every unit is fitment-verified before dispatch. Manual reference: 3406E: ELECTRICAL AND STARTING SYSTEM, group 102-7664, page 401; 3412C: LUBRICATION SYSTEM, group 109-0078, page 226.

8J4351 SEAL-O-RIN for Caterpillar 345C — Genuine CAT & Replacement Part

WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement SEAL-O-RIN (Part # 8J4351). Designed for CAT 345C, C18, 345B, 3406E, 3412C, 365B, C13, C15, G3608, G3612, G3616, 345D equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 345C, C18, 345B, 3406E, 3412C, 365B, C13, C15, G3608, G3612, G3616, 345D
• ✔ 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)	8J4351
Product Name	SEAL-O-RIN
Brand	CAT
Applicable Models	345C, C18, 345B, 3406E, 3412C, 365B, C13, C15, G3608, G3612, G3616, 345D
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 8J4351 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
3406E	ELECTRICAL AND STARTING SYSTEM	102-7664	p.401
3412C	LUBRICATION SYSTEM	109-0078	p.226
345B	LUBRICATION SYSTEM	117-2746	p.59
345C	LUBRICATION SYSTEM	233-5221	p.67
365B	LUBRICATION SYSTEM	117-2746	p.58
C13	LUBRICATION SYSTEM	236-4570	p.386
C15	ELECTRICAL AND STARTING SYSTEM	192-1623	p.903
C18	ELECTRICAL AND STARTING SYSTEM	241-2422	p.320

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 — LUBRICATION SYSTEM

The lubrication system covers the oil pump, oil cooler, oil filter base, relief valves, dipstick tube, pan and the galleries that distribute oil to every bearing in the engine. It is the system that keeps metal off metal. Failures tend to be either pressure loss — a worn pump, a stuck relief valve, a collapsed filter — or contamination, where sludge and debris circulate and score bearing surfaces. Oil pressure that reads low at idle, a filter that comes out heavy, or oil that turns dark far sooner than usual are the signals. Parts in this group are replaced on measured oil pressure and lab results rather than on interval alone.

FAQ

Is 8J4351 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 345C.

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