Swing Motor Assembly 418-7155 225-4505 334-9975 for E349D E349D2 330D 345D Excavator

This swing motor assembly, with part numbers 418-7155, 225-4505, and 334-9975, is the swing power unit specially designed for the E349D, E349D2, 330D, and 345D excavator swing systems. It integrates a hydraulic swing motor and a planetary reduction gearbox, converting hydraulic pressure into high torque to realize smooth rotation of the upper body. The assembly adopts a high-precision planetary gear set and wear-resistant alloy materials, allowing for direct replacement installation with stable and reliable performance on heavy-duty construction sites.

1. Internal seal damage, hydraulic oil leakage
2. Gear and bearing wear, abnormal knocking noise
3. Weak swing power, slow rotation speed
4. Spline shaft wear, power transmission slipping
5. Brake failure, unable to lock rotation position

1. Confirm part number and machine serial number before ordering
2. Verify spline specification, mounting dimension, and brake type
3. Request running performance test before delivery
4. Anti-collision wooden packaging to avoid transit damage
5. Quality warranty for manufacturing defects