CATEngine Parts

1659419 Stick Cylinder Seal Kit — Cat 318B 1090

This is a comprehensive stick cylinder seal kit designed to restore the sealing integrity of the hydraulic cylinder on construction equipment. It contains all necessary seals and O-rings to prevent hydraulic fluid leaks and maintain proper cylinder operation, ensuring consistent boom and stick movement. A worn or damaged seal kit will manifest as external fluid leaks, slow cylinder response, or the inability of the cylinder to hold its position under load.

Stick Cylinder Seal Kit – Part No 1659419 – 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
ApplicationStick Cylinder
Service LifeReplace when cylinder leaks or performance degrades
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing stick cylinder seal kit is visible hydraulic fluid leakage around the cylinder rod or at the cylinder base. If left unaddressed, the cylinder will lose its ability to hold pressure, leading to slow or erratic movement and reduced lifting capacity. Eventually, the cylinder may fail to extend or retract, immobilizing the equipment's boom or stick.

Installation Tip

Thoroughly clean the cylinder bore and rod before installing new seals to prevent damage from debris. Ensure all new seals are properly lubricated with clean hydraulic fluid before insertion to prevent tearing.

Service Note

When replacing the stick cylinder seal kit, inspect the cylinder rod for scoring or damage and check the hydraulic fluid level and condition.