Excavator Hydraulic Motors — Swing, Travel and Geared Units

Kawasaki M5X130 variants have different displacements

The M5X130-121 motor has122cm³/rev displacement, while the M5X130 entry has129cm³/rev. Both are fixed-displacement swing motors with1850rpm maximum speed and47kg motor mass. Their rated-pressure and torque fields differ.

A reducer changes the output quantities

A gearedM5X130CHB-RG14D unit has92rpm maximum output speed,13,800Nm rated output torque and280kg assembly mass. Those are geared-unit values; they are not the bare motor’s1850rpm and47kg values.

Separate the machine assembly number from the motor design code

A Kobelco swing purchase can use YN15V00002F2 as a hydraulic-motor entry within the YN32W00002F2 swing assembly. The motor’s plate also carries its design code. Put both identities on the quote so a complete swing assembly and the hydraulic motor section are not treated as the same purchase.

Travel-motor connections include control and brake functions

A travel motor has two work ports, case drain and its selected speed/brake control. A swing unit has its own brake and valve arrangement. The flange, drive shaft and port face complete the physical connection; displacement alone does not describe it.

Compare a complete motor with a rebuild list

A replacement-motor line identifies the assembled unit and controls. A workshop rebuild instead lists the cylinder block, pistons/shoes, valve plates, seals and bearings from the dismantled motor. Keep the retained reducer identity beside the hydraulic repair.

Buying questions