CATEngine Parts

350-0975 Stick Cylinder Seal Kit — Cat 325D 320D

This stick cylinder seal kit is designed to restore the sealing integrity of the hydraulic cylinder responsible for boom articulation on compatible CAT equipment. It is manufactured from high-grade materials that meet or exceed OEM specifications, providing superior resistance to wear and hydraulic fluid degradation compared to a worn seal. Operators will typically observe hydraulic fluid leaks around the cylinder rod, sluggish or jerky boom movement, and a loss of lifting or holding power when the seals fail.

Stick Cylinder Seal Kit – Part No 350-0975 – 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 polyurethane
ApplicationExcavator stick cylinder
Service LifeReplace when leaks are detected or performance degrades
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failing seal kit is often visible hydraulic fluid leakage from the cylinder rod gland. If ignored, the leakage will worsen, leading to a gradual loss of hydraulic pressure and slower, less responsive boom movements. Continued operation can result in significant hydraulic system contamination and potential damage to the cylinder bore and rod.

Installation Tip

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

Service Note

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