CATEngine Parts

250-2485 Hydraulic Cylinder Seal Kit — Cat 320B

This hydraulic cylinder seal kit is engineered to restore the sealing integrity of hydraulic cylinders, preventing internal and external fluid leakage. Manufactured to meet Caterpillar's demanding specifications, it utilizes durable materials that resist wear, heat, and hydraulic fluid degradation, outperforming worn seals. Operators typically observe external fluid leaks, spongy or slow hydraulic movements, and a reduction in the cylinder's lifting or actuating force when this kit is needed.

Hydraulic Cylinder Seal Kit – Part No 250-2485 – 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
MaterialPolyurethane and NBR rubber
ApplicationHydraulic cylinder sealing
Service LifeReplace every 1,000-2,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The primary indication of a failing hydraulic cylinder seal kit is the appearance of hydraulic fluid leaks around the cylinder rod or at the cylinder end caps. Continued operation will result in a noticeable decrease in hydraulic system efficiency, characterized by sluggish boom, bucket, or stick movements. Ultimately, the cylinder may lose its ability to hold position or generate sufficient force, impacting the machine's operational capabilities.

Installation Tip

Always use a specialized seal installation tool to avoid damaging the delicate sealing lips of the new components. Ensure the cylinder rod is clean and free of any burrs or imperfections before sliding the new seals into place.

Service Note

Check the hydraulic fluid level and condition, and inspect the cylinder barrel for wear or damage when replacing the seal kit.