CATEngine Parts

216-8100 Bucket Cylinder Seal Kit — Cat Mini Excavator 304

This is a CAT Bucket Cylinder Seal Kit, a comprehensive set of seals designed to restore the functionality of a hydraulic cylinder used for bucket actuation. It is manufactured to meet stringent OEM quality standards, ensuring reliable sealing and smooth operation, unlike worn seals that can cause cylinder drift, leaks, and reduced lifting capacity. Operators may notice the bucket slowly lowering under load, jerky cylinder movement, or hydraulic fluid leaks around the cylinder when this kit is needed.

Bucket Cylinder Seal Kit – Part No 216-8100 – 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, Polyurethane
ApplicationBucket Hydraulic Cylinder
Service LifeReplace based on cylinder performance or leakage
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of worn bucket cylinder seals is often a slow drift of the bucket when holding a load. If ignored, this can progress to jerky or inconsistent cylinder operation and noticeable external hydraulic fluid leaks. Continued operation risks significant loss of hydraulic pressure and potential damage to the cylinder rod and bore.

Installation Tip

Carefully clean the cylinder bore and rod, ensuring all old seal material is removed without scratching the surfaces. Install the new seals using appropriate tools to avoid nicking or damaging them during insertion.

Service Note

When replacing the bucket cylinder seal kit, inspect the cylinder rod for scoring or damage and check the hydraulic fluid level and condition.