CAT 1358855 SEAL-PISTO for 345B Caterpillar Part - WSTPARTS
The 1358855 SEAL-PISTO is a genuine and high-quality OEM replacement part compatible with Caterpillar 345B and 365B equipment. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 345B: HYDRAULIC SYSTEM, group 135-8852, page 586.
1358855 SEAL-PISTO for Caterpillar 345B — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement SEAL-PISTO (Part # 1358855). 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) | 1358855 |
| Product Name | SEAL-PISTO |
| Brand | CAT |
| Applicable Models | 345B, 365B |
| Weight | 1.36 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1358855 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 | 135-8852 | p.586 |
| 365B | HYDRAULIC SYSTEM | 135-8852 | p.518 |
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 1358855 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
