CAT 0951573 O-RING for 345B Caterpillar Part - WSTPARTS
0951573 O-RING is a Seal component engineered for Caterpillar 345B and 365B machines, built to match original factory specifications. It is categorized under Seal. Every unit is fitment-verified before dispatch. Manual reference: 345B: HYDRAULIC SYSTEM, group 123-1998, page 576; 365B: HYDRAULIC SYSTEM, group 143-7977, page 509.
0951573 O-RING for Caterpillar 345B — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement O-RING (Part # 0951573). Designed for CAT 345B, 365B equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345B, 365B
- ✔ 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) | 0951573 |
| Product Name | O-RING |
| Brand | CAT |
| Applicable Models | 345B, 365B |
| 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 0951573 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 |
| 345B | HYDRAULIC SYSTEM | 123-1998 | p.576 |
| 365B | HYDRAULIC SYSTEM | 143-7977 | p.509 |
| 345B | HYDRAULIC SYSTEM | 147-5789 | p.577 |
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.
FAQ
Is 0951573 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 345B.
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
