CAT 0951603 O-RING for 365B Caterpillar Part - WSTPARTS

WSTPARTS supplies the 0951603 O-RING, a CAT Seal replacement part designed for Caterpillar 365B, 330C and 325C applications. It is categorized under Seal. Every unit is fitment-verified before dispatch, backed by factory-direct pricing and warranty coverage, and currently in stock for dispatch within 24 hours. Manual reference: 330D: HYDRAULIC SYSTEM, group 259-7402, page 627; 345B: HYDRAULIC SYSTEM, group 143-4179, page 553.

0951603 O-RING for Caterpillar 365B — Genuine CAT & Replacement Part

WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement O-RING (Part # 0951603). Designed for CAT 365B, 330C, 325C, 336D, 325D, 330D, 320C, 320D, 345B equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 365B, 330C, 325C, 336D, 325D, 330D, 320C, 320D, 345B
• ✔ Meets Caterpillar original quality and performance standards
• ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
• ✔ In stock, ready to ship

Specifications

Part Number (MPN)	0951603
Product Name	O-RING
Brand	CAT
Applicable Models	365B, 330C, 325C, 336D, 325D, 330D, 320C, 320D, 345B
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 0951603 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
330D	HYDRAULIC SYSTEM	259-7402	p.627
336D	UNDERCARRIAGE	259-7402	p.524
345B	HYDRAULIC SYSTEM	143-4179	p.553
365B	FRAME AND BODY	105-6988	p.357
325C	HYDRAULIC SYSTEM	177-2802	p.755
325D	HYDRAULIC SYSTEM	255-5653	p.592
330C	HYDRAULIC SYSTEM	190-7702	p.705
330D	HYDRAULIC SYSTEM	259-7402	p.612

System Notes — HYDRAULIC SYSTEM

The hydraulic system covers the main pump, control valves, cylinders, hydraulic tank, filters, hoses and all the fittings that connect them. It converts engine power into the pressure and flow that drive boom, bucket, steering and travel functions. Hydraulic parts fail mainly through contamination and heat: dirt that passes a worn breather scores pump components, aged hoses crack at the crimp, and O-rings harden and weep under pressure. A part in this group is normally replaced when a function drifts, a cylinder creeps, oil shows up under a machine that used to be dry, or the filter comes out loaded with metal.

System Notes — UNDERCARRIAGE

The undercarriage group covers tracks, shoes, links, bushings, rollers, idlers, sprockets, track tensioners and the recoil hardware. It carries the whole machine weight and transmits drive force to the ground, and it is normally the single largest wear cost on a tracked machine. Wear is a system: a worn sprocket accelerates chain wear, a loose track pounds the bushings, and a seized roller flat-spots the link it runs on. Parts here are replaced on measured wear — bushing diameter, shoe height, roller flange — and replacing one component out of phase with the rest usually shortens the life of both.

FAQ

Is 0951603 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 365B.

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?
In stock — ships within 24 hours. Every order is covered by a warranty per quotation.

📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com