CAT 1559121 COVER for 345B Caterpillar Part - WSTPARTS
1559121 COVER is a Structure component engineered for Caterpillar 345B machines, built to match original factory specifications. It is categorized under Structure. Every unit is fitment-verified before dispatch. Manual reference: 345B: HYDRAULIC SYSTEM, group 155-9107, page 657.
1559121 COVER for Caterpillar 345B — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement COVER (Part # 1559121). Designed for CAT 345B equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345B
- ✔ 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) | 1559121 |
| Product Name | COVER |
| Brand | CAT |
| Applicable Models | 345B |
| Weight | 5.4 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1559121 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 | 155-9107 | p.657 |
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 1559121 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 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
