CATEngine Parts

266-7892 Bucket Cylinder Seal Kit — Cat 320D

This is a bucket cylinder seal kit, containing all necessary seals and O-rings to rebuild a hydraulic bucket cylinder. It is manufactured from high-grade materials to withstand high pressures and abrasive conditions, outperforming worn seals that leak fluid. Operators might observe a slow or jerky bucket movement, external hydraulic fluid leaks around the cylinder, or a loss of lifting/dumping force when this seal kit is needed.

Bucket Cylinder Seal Kit – Part No 266-7892 – 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, Polyurethane
ApplicationBucket Hydraulic Cylinder
Service LifeReplace as needed based on inspection or leakage
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing seal kit include slow or erratic bucket operation and visible hydraulic fluid leaks around the cylinder rod. If ignored, the cylinder will lose pressure more rapidly, leading to reduced lifting capacity. The worst consequence is potential hydraulic system contamination and loss of critical machine functions.

Installation Tip

Thoroughly clean the cylinder bore and rod before installing new seals to prevent damage and ensure a proper seal. Do not use sharp tools to install seals, as this can easily nick or cut them.

Service Note

Inspect the cylinder rod for scoring or damage, and check the hydraulic fluid for contamination before installing a new bucket cylinder seal kit.