CATEngine Parts

155-0875 Planet Gear — Cat

This planet gear is a crucial component within the planetary gear set of the transmission or final drive, transmitting torque and enabling gear reduction in CAT equipment. It is manufactured from hardened steel with precision-ground teeth to ensure smooth engagement and durability under high loads, unlike a worn gear with chipped or rounded teeth. Operators may experience whining or grinding noises from the drivetrain, or a loss of power and drive as symptoms of a damaged planet gear.

Planet Gear – Part No 155-0875 – 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 TypePlanetary Gear
MaterialHardened steel
ApplicationTransmission or final drive planetary set
Service LifeReplace as needed based on wear
CompatibilityCAT 3056, 3116, C6, C7, M318
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing planet gear is often an increase in drivetrain noise, such as whining or grinding sounds. If left unaddressed, this can lead to intermittent engagement issues and a gradual loss of drive power. The worst outcome is the potential for gear teeth to break, causing severe internal damage to the transmission or final drive.

Installation Tip

Ensure all mating surfaces are clean and free of old lubricant or debris before assembly. Carefully align the gear teeth to avoid cross-threading or damaging the gear during installation.

Service Note

Inspect the transmission or final drive fluid for metal particles, which can indicate gear wear, when replacing a planet gear.