CATTransmission Parts

171-9316 Swing Gearbox — Cat Excavator 308C

This Swing Gearbox is a specialized unit that provides the necessary reduction and torque to rotate the upper structure of an excavator. It is engineered to meet OEM performance requirements, ensuring smooth and precise swing movements, unlike a worn gearbox with damaged teeth or failing seals. Operators may observe slow or jerky swing functions, inability to hold position, or excessive noise during rotation if this gearbox is malfunctioning.

Swing Gearbox – Part No 171-9316 – 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 TypeSwing Gearbox
MaterialSteel Alloy
ApplicationExcavator Swing Mechanism
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing swing gearbox may include a rough or hesitant swing motion, or a noticeable increase in noise during rotation. If ignored, the swing speed may become significantly reduced, or the gearbox may lose its ability to hold the upper structure in position. This can lead to reduced operational efficiency and potential control issues.

Installation Tip

Ensure the swing bearing is clean and properly lubricated before mounting the gearbox to prevent binding. Do not overtighten the mounting bolts, as this can distort the gearbox housing.

Service Note

Inspect the swing motor, drive shaft, and swing bearing for wear or damage when replacing the swing gearbox.