CATEngine Parts

2d-2978-6g976 Spider Bearing Assembly — Cat 3306 120

This spider bearing assembly is a critical component within the engine's driveline system, designed to facilitate smooth rotational power transfer. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or damaged bearings that exhibit excessive play or noise. Operators may notice increased vibration, audible grinding noises, or a loss of power when this component begins to fail.

Spider Bearing Assembly – Part No 2d-2978-6g976 – 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 TypeSpider Bearing Assembly
MaterialForged steel with hardened races
ApplicationEngine driveline system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing spider bearing assembly include increased vibration felt through the chassis and audible clunking noises during acceleration or deceleration. If ignored, the wear will progress, leading to excessive driveline lash and potential damage to surrounding components. Continued operation with a severely worn assembly risks driveline disconnection, causing immediate operational stoppage.

Installation Tip

Ensure the mating surfaces are perfectly clean and free of debris before installation to prevent premature wear. Avoid over-tightening the bearing cap bolts, as this can distort the bearing races and lead to early failure.

Service Note

Inspect the driveshaft and differential for any signs of wear or damage when replacing the spider bearing assembly.