CATEngine Parts

236-6389 Bucket Cylinder Seal Kit — Cat

This is a CAT Bucket Cylinder Seal Kit, designed to maintain hydraulic pressure and prevent fluid leakage within the bucket cylinder assembly. It is constructed from high-grade sealing materials that resist wear and extrusion far better than seals on a worn or damaged cylinder. Operators will typically observe a gradual loss of lifting power, visible hydraulic fluid leaks around the cylinder rod, or slow bucket movement when this seal kit fails.

Bucket Cylinder Seal Kit – Part No 236-6389 – 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, Polyurethane
ApplicationBucket hydraulic cylinder
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Slow or weak bucket curling and dumping functions are common initial indicators. This will progress to noticeable hydraulic fluid leaks from the cylinder rod seal area and potentially a complete loss of hydraulic pressure to the bucket cylinder. Continued operation risks internal cylinder damage and hydraulic system contamination.

Installation Tip

Thoroughly clean the cylinder bore and rod before installing new seals to prevent damage and ensure a proper seal. Ensure each seal is oriented correctly according to its design to prevent immediate leakage.

Service Note

Inspect the cylinder rod for scoring or damage, and check the hydraulic fluid for contamination when replacing the bucket cylinder seal kit.