XKAQ-00008 is an excavator spare part number. It usually refers to the Ring Gear (internal gear) used in the swing reduction gearbox.

Basic information

• Part number: XKAQ-00008

• Part name: Ring Gear / Ring Gear 1

• System: Swing reduction gearbox

• Machine type: Excavator

Function

The ring gear is part of the planetary gear system inside the swing gearbox.
It works with other gears to transmit torque from the swing motor.

Typical planetary gear arrangement:

1. Sun gear

2. Planet gears

3. Ring gear (XKAQ-00008)

4. Carrier

The ring gear is the large outer gear with internal teeth. Planet gears rotate inside it to reduce speed and increase torque, allowing the excavator upper structure to rotate (swing).

If the ring gear is damaged

You may notice:

• Abnormal noise from the swing gearbox

• Weak or irregular swing movement

• Metal particles in the gearbox oil