CATEngine Parts

259-0751 Bucket Cylinder Seal Kit — Cat 336D

This is a seal kit designed to replace worn seals within the bucket cylinder of CAT equipment. It ensures the hydraulic system maintains optimal pressure by preventing fluid leaks, crucial for smooth and efficient operation. Failure of these seals often manifests as slow or jerky bucket movements, external hydraulic fluid leaks around the cylinder rod, or a noticeable loss of lifting power.

Bucket Cylinder Seal Kit – Part No 259-0751 – 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 and durable seals
ApplicationBucket Cylinder Hydraulic System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of seal failure is often a visible hydraulic fluid leak around the cylinder rod. If ignored, the cylinder will lose pressure, leading to slower and weaker bucket movements. Eventually, the cylinder may fail to hold its position under load, compromising operational safety and efficiency.

Installation Tip

Clean the cylinder bore and rod thoroughly to remove any debris or old seal material before installation. Avoid using sharp tools that could scratch the rod surface when removing old seals or installing new ones.

Service Note

Inspect the hydraulic fluid for contamination and consider replacing the hydraulic filter when servicing the bucket cylinder seals.