CATTransmission Parts

119-7042 Sun Gear Shaft — Cat 416C 416D

This is a Sun Gear Shaft, a vital component within the planetary gear set of the transmission, responsible for transmitting rotational force. It is manufactured from high-strength steel to withstand the immense torque and stresses of heavy-duty operation, ensuring reliable power delivery unlike a worn or damaged shaft. Operators may experience symptoms such as grinding noises during gear changes, loss of power, or an inability to engage certain gears when this shaft is compromised.

Sun Gear Shaft – Part No 119-7042 – CAT Spare Part
Part Specifications
BrandCAT
CategoryTransmission 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

Drain and replace transmission fluid when servicing internal components. Use correct ATF specification. Pre-fill torque converters with fluid before installation. Allow 10 minutes for fluid to settle before checking level.

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 Shaft
MaterialHardened steel alloy
ApplicationPlanetary gear set, Transmission
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing sun gear shaft might include a subtle increase in gear whine or a slight looseness felt during operation. If left unaddressed, this can lead to more pronounced gear grinding, intermittent power loss, or complete failure to engage specific drive gears. This can render the machine inoperable or severely limit its functionality.

Installation Tip

Ensure all bearing surfaces on the shaft and within the transmission case are meticulously cleaned and lubricated before installation. Avoid forcing the shaft into position; it should slide in smoothly if aligned correctly.

Service Note

Inspect the planet gears, bearings, and seals that mesh with or support the sun gear shaft for wear and damage.