CATEngine Parts

8d-1508 Spider Bearing Assembly — Cat 12G 140

This spider bearing assembly is a crucial component within the drive axle or differential, enabling smooth and controlled rotation of the drive shafts. It supports the spider gears, allowing them to pivot and distribute torque to the wheels during turns. A worn or damaged assembly can cause clunking noises, vibration, and uneven tire wear, potentially leading to drivetrain binding or failure.

Spider Bearing Assembly – Part No 8d-1508 – 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
MaterialHardened Steel
ApplicationDifferential / Drive Axle
Service LifeReplace if noise/vibration occurs or during axle overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first noticeable symptom of a failing spider bearing assembly is often a clunking or clicking sound when the machine turns. If ignored, this can progress to significant vibration under load and uneven tire wear. Continued operation risks differential damage and potential drivetrain binding, leading to loss of mobility.

Installation Tip

Ensure all bearing surfaces and gear teeth are thoroughly cleaned and lubricated before assembly. Improper seating of the bearings can lead to premature wear and noise.

Service Note

When replacing the spider bearing assembly, it is essential to inspect the differential gears, axle shafts, and seals for any signs of wear or damage.