CATEngine Parts

1107051 Gear-Sun — Cat 320C 320D

This is a precision-engineered sun gear, a vital component within the power train's planetary gear sets. Manufactured to exact tolerances for smooth engagement and efficient power transfer, it ensures optimal drive performance, unlike worn gears that can cause grinding noises and power loss. Operators may observe rough gear changes, a noticeable loss of drive power, or hear abnormal gear whine when this sun gear is failing.

Gear-Sun – Part No 1107051 – 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 TypeSun Gear
MaterialHardened steel alloy
ApplicationPlanetary gear set in transmission or final drive
Service LifeReplace during transmission or final drive overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of a failing sun gear include a subtle increase in drivetrain noise, particularly under load, or a slight hesitation during gear engagement. If ignored, the wear can progress to significant gear grinding, a noticeable loss of torque, and potential disengagement of the drive. Continued operation risks complete gear set failure, leading to immobilization of the equipment.

Installation Tip

Ensure all gear teeth are properly lubricated with the correct type of gear oil before assembly to prevent initial dry running. Avoid forcing the gear into position; it should mesh smoothly with the mating gears.

Service Note

Inspect the ring gear and planet gears for matching wear patterns and check all associated bearings and seals for signs of leakage or damage.