CATEngine Parts

1195435 Boom Cylinder Seal Kit — Cat 311B 312B

This is a seal kit designed to replace worn seals within the boom cylinder of heavy machinery, ensuring proper hydraulic pressure retention and preventing fluid leaks. It is manufactured to meet stringent OEM quality standards, offering superior durability and sealing performance compared to degraded or damaged original seals. Operators may notice slow or jerky boom movements, or visible hydraulic fluid leaks around the cylinder rod as signs of seal failure.

Boom Cylinder Seal Kit – Part No 1195435 – 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, PTFE, POM
ApplicationBoom cylinder hydraulic system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Slow or erratic boom operation, accompanied by visible hydraulic fluid leaks around the cylinder rod, are the first indicators of seal failure. If left unaddressed, the leakage will worsen, leading to a loss of hydraulic power and potentially compromising the machine's ability to lift or hold loads.

Installation Tip

Ensure the cylinder bore and rod are meticulously cleaned and free of any debris or burrs before installing the new seals. Avoid using sharp tools that could nick or damage the delicate sealing surfaces during insertion.

Service Note

Inspect the cylinder rod for any scoring or damage, and check the hydraulic fluid for contamination.