Caterpillar Hydraulic Cylinder Seal Kit 525-3520 is a seals & filters product that supports fluid sealing, contamination control and system protection. It is listed for Caterpillar heavy-equipment applications; use part number 525-3520 as the primary identification reference.
- Part Number: 525-3520
- Brand: Caterpillar
- Product Category: Seals & Filters
- Equipment Type: Excavator, Mobile Hyd Power Unit
- Compatible Models: 365C L, 340, 365B II, 330, 365C, 336E L, 330C, 345C L, 340F L UHD, 345C, 365B
- Engine Models: Confirm by equipment serial number
- Condition: New
Fitment can vary by machine configuration and serial-number range. Compare the original part number, dimensions, connectors and mounting points before purchase.





