CATEngine Parts

155-0867 Pinion — Cat

This pinion is a crucial gear component within the drivetrain, transmitting rotational force from the drive shaft to other gears in the differential or transmission. Manufactured to precise tolerances, it ensures smooth and efficient power transfer, unlike a worn pinion with chipped or rounded teeth. Operators may notice whining or clunking noises from the drivetrain, difficulty engaging gears, or a loss of power to the wheels when a pinion fails.

Pinion – Part No 155-0867 – 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 TypePinion Gear
MaterialHardened steel
ApplicationDrivetrain, differential or transmission
Service LifeReplace as needed based on wear
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failing pinion is often an audible whine or clunking noise from the drivetrain that changes with speed or load. If left unaddressed, this noise will likely increase in severity, accompanied by rough gear engagement or a noticeable loss of drive power. Continued operation risks further damage to the pinion, ring gear, and potentially other drivetrain components.

Installation Tip

Thoroughly clean the differential housing and surrounding components before installation to prevent debris contamination. Ensure the correct gear backlash and pinion depth are set according to manufacturer specifications during assembly.

Service Note

When replacing a pinion gear, always inspect the corresponding ring gear for wear or damage and replace it as a set if necessary.