CATEngine Parts

234-4576 Stick Cylinder Seal Kit — Cat 320D

This is a seal kit designed to replace worn seals within a CAT stick cylinder, 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 hydraulic fluid leaks around the cylinder rod, sluggish boom or stick movement, or a loss of holding power when the seals begin to fail.

Stick Cylinder Seal Kit – Part No 234-4576 – 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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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 bronze composite
ApplicationStick cylinder sealing
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Visible hydraulic fluid leakage around the stick cylinder rod is the first sign of seal failure. If ignored, this leakage will worsen, leading to a gradual loss of hydraulic system pressure and slower, less responsive cylinder operation. Continued operation with failing seals can result in inadequate lifting capacity and potential damage to other hydraulic components due to low fluid levels.

Installation Tip

Ensure the cylinder bore is meticulously clean before installing new seals to prevent damage from debris. Avoid using sharp tools that could nick or cut the seal lips during insertion.

Service Note

Inspect the cylinder rod for any scoring or pitting that could compromise the new seals' effectiveness.