CATEngine Parts

170-9941 Bucket Cylinder Seal Kit — Cat 320D

This is a Bucket Cylinder Seal Kit, essential for maintaining hydraulic pressure and preventing fluid leaks within the bucket actuator system. Manufactured to meet rigorous standards, it offers superior resistance to wear and contamination compared to seals that have begun to degrade. Operators will typically observe a slow or jerky bucket movement, external hydraulic fluid leaks around the cylinder, or a loss of lifting capacity when this seal kit fails.

Bucket Cylinder Seal Kit – Part No 170-9941 – 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 / Urethane
ApplicationBucket Hydraulic Cylinder
Service LifeReplace when cylinder shows signs of leakage or performance degradation
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing bucket cylinder seal kit is often a visible hydraulic fluid leak around the cylinder rod or barrel. This will progress to slower, less responsive bucket movements and a noticeable decrease in lifting force. If left unaddressed, the hydraulic system can lose pressure, leading to an inability to operate the bucket effectively.

Installation Tip

Thoroughly clean the cylinder bore and rod, ensuring no dirt or debris remains that could damage the new seals during installation. Avoid using sharp tools to pry the seals into place, as this can easily cause nicks and leaks.

Service Note

Inspect the cylinder rod for scoring or damage, and check the hydraulic fluid for contamination before installing a new seal kit.