CATEngine Parts

234-4566 Boom Cylinder Seal Kit — Cat 320D

This boom cylinder seal kit is designed to prevent hydraulic fluid leakage and contamination within the boom cylinder assembly, maintaining optimal system pressure and performance. Constructed from high-quality, durable elastomers, these seals resist wear and fluid degradation better than compromised seals. Operators may experience slow or jerky boom movements, external fluid leaks around the cylinder, or a loss of lifting capacity when this seal kit fails.

Boom Cylinder Seal Kit – Part No 234-4566 – 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 TypeSeal Kit
MaterialNBR Rubber / Polyurethane
ApplicationBoom Cylinder
Service LifeReplace when leaks are detected or during cylinder overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing boom cylinder seal kit is often a visible hydraulic fluid leak around the cylinder rod or barrel. If left unaddressed, the leak will worsen, leading to a gradual loss of hydraulic pressure and sluggish equipment operation. The ultimate consequence is a significant reduction in the machine's lifting capacity and potential system contamination.

Installation Tip

Thoroughly clean the cylinder bore and rod before installing the new seals to prevent damage. Ensure the seals are oriented correctly according to the service manual to prevent immediate leakage.

Service Note

Inspect the cylinder rod for scoring and the cylinder bore for wear when replacing the boom cylinder seal kit.