CATTransmission Parts

151-9686 Final Drive Motor Assembly — Cat Excavator 312B L

This is a Final Drive Motor Assembly for Caterpillar equipment, responsible for transmitting power to the tracks or wheels for propulsion. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or damaged units. Operators may notice a loss of power, slow or erratic track movement, or complete loss of drive if this component fails.

Final Drive Motor Assembly – Part No 151-9686 – 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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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 TypeFinal Drive Motor Assembly
MaterialForged steel and high-strength alloys
ApplicationPropulsion system
Service LifeReplace based on inspection and performance metrics
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of failure often include a whining or grinding noise during operation, followed by a noticeable decrease in track speed or power. If left unaddressed, the drive motor can seize, preventing any machine movement and potentially causing damage to surrounding drivetrain components.

Installation Tip

Ensure the final drive housing is thoroughly cleaned internally and externally before installation to prevent contamination. Avoid over-tightening mounting bolts, as this can distort the housing and lead to premature seal failure.

Service Note

Inspect the drive shaft, planetary gears, and hydraulic fluid for contamination or wear when replacing the final drive motor.