CATEngine Parts

333-8675 Bucket Cylinder Seal Kit — Cat C13 349D

This bucket cylinder seal kit is essential for maintaining the hydraulic integrity of the excavator's bucket actuation system. It contains all necessary seals and O-rings manufactured to OEM performance specifications, providing a superior seal compared to worn or cracked original seals. Operators might observe slow or jerky bucket movements, external hydraulic fluid leaks, or a loss of lifting capacity when this kit is needed.

Bucket Cylinder Seal Kit – Part No 333-8675 – 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 polyurethane
ApplicationExcavator bucket cylinder
Service LifeReplace every 2,000-4,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of seal failure is often external hydraulic fluid leakage around the cylinder rod or slow, weak bucket movements. If ignored, the cylinder will lose pressure more rapidly, leading to significantly reduced lifting force and control. Continued operation risks internal cylinder damage and potential hydraulic system contamination.

Installation Tip

Carefully inspect the cylinder rod and bore for any scoring or damage before installing new seals, as imperfections will quickly damage the new seals. Ensure all sealing surfaces are clean and lightly lubricated with system-approved hydraulic fluid.

Service Note

Inspect the hydraulic fluid for contamination and check the condition of the hydraulic pump and hoses when replacing bucket cylinder seals.