CATEngine Parts

235-7679 Bucket Pin Seal — Cat C18

This seal is specifically designed to prevent the ingress of dirt and the egress of lubricant from the pivot point of a hydraulic bucket. Manufactured from durable, high-performance rubber compounds, it provides superior sealing compared to a worn or cracked seal. Operators may notice excessive play or looseness in the bucket's pivot joint, or hear squeaking noises, when this seal fails.

Bucket Pin Seal – Part No 235-7679 – 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 TypeBucket Pin Seal
MaterialHigh-performance rubber
ApplicationBucket pivot joint
Service LifeReplace as needed based on wear or leakage
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failed bucket pin seal is often increased noise, such as squeaking or grinding, from the bucket pivot. This is followed by noticeable looseness or excessive play in the bucket linkage, which can affect digging precision. If left unaddressed, the lack of lubrication and ingress of contaminants will accelerate wear on the pin and bushings, potentially leading to costly repairs.

Installation Tip

Ensure the pin bore and the pin itself are completely clean and free of any old seal material or debris before attempting installation. Do not use excessive force or pry the seal into place, as this can damage its sealing lip.

Service Note

When replacing bucket pin seals, it is essential to inspect the bucket pins and bushings for wear and to re-grease the pivot thoroughly after installation.