CATEngine Parts

0875394 Bucket Cylinder Seal Kit — Cat 320 320L

This is a Bucket Cylinder Seal Kit, essential for maintaining the integrity of the hydraulic system in the bucket cylinder of CAT excavators. It is built to OEM standards, providing robust sealing against high pressures and contaminants, unlike worn seals that allow fluid loss and system contamination. Operators will typically observe a loss of hydraulic pressure, slow or erratic bucket movements, and visible hydraulic fluid leaks around the cylinder rod when this seal kit fails.

Bucket Cylinder Seal Kit – Part No 0875394 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeHydraulic Cylinder Seal Kit
MaterialNBR rubber, PTFE, and metal components
ApplicationBucket Cylinder Hydraulic System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failing seal kit is often a slight drift of the bucket when holding a load or a minor fluid leak at the cylinder rod. If left unaddressed, the leakage will increase, leading to slower hydraulic response times and reduced lifting capacity. Prolonged operation with leaking seals can cause significant contamination of the hydraulic oil and damage to cylinder components.

Installation Tip

Thoroughly clean the cylinder bore and rod before installing the new seals to prevent damage and ensure a proper seal. Ensure all seals are oriented correctly according to the manufacturer's specifications.

Service Note

Inspect the cylinder rod for pitting or scoring and clean the hydraulic fluid reservoir during seal replacement.