CATEngine Parts

585-5978 Hydraulic Cylinder Seal Kit — Cat 304E2 304

This is a hydraulic cylinder seal kit, containing all necessary seals and O-rings to rebuild a hydraulic cylinder and prevent fluid leakage. Manufactured from high-quality, durable materials like NBR or polyurethane, these seals maintain system pressure and prevent contamination, unlike worn seals that allow fluid bypass and reduced hydraulic efficiency. Operators might notice external fluid leaks around the cylinder, slow or jerky cylinder operation, or a loss of lifting/actuating force when seals begin to fail.

Hydraulic Cylinder Seal Kit – Part No 585-5978 – 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
ApplicationHydraulic cylinder
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of failing seals is often visible hydraulic fluid leakage around the cylinder rod or barrel. If left unaddressed, the leakage will increase, leading to a gradual loss of hydraulic system pressure and slower, less responsive cylinder movement. The ultimate consequence is a loss of equipment function due to insufficient hydraulic power.

Installation Tip

Carefully inspect the cylinder rod and bore for any nicks or scratches before installing the new seals, as these can quickly damage new seals. Avoid using sharp tools to install seals, as this can easily cut or tear the delicate sealing surfaces.

Service Note

When rebuilding a hydraulic cylinder, inspect the piston and rod for wear, and clean the cylinder bore thoroughly.