Swing Motor; Description; Maintenance - Manitowoc Grove RT530E-2 Service And Maintenance Manual

SWING SYSTEM

SWING MOTOR

Description

The swing motor is mounted on the swing brake housing and
drives the swing gearbox through the brake assembly. The
swing motor is a hydraulic gerotor type with low speed and
high torque characteristics. It has only three moving parts,
the commutator valve, the drive, and the gerotor star. The
motor has two ports for connection to the hydraulic system.

Maintenance

Removal
1. Ensure the swing brake and swing lock are engaged.
2. Clean the port area around the motor. Tag and
disconnect the hydraulic hoses from the motor
assembly. Cap or plug all openings.
CAUTION
Oil can be hot and cause burns.
3. Remove the drain plug, loosen the filler and level plugs,
and drain the oil. After oil is drained, replace the drain
plug and any other plugs that may have been removed.
CAUTION
Pull straight up on the motor assembly to avoid damaging
the splined shaft.
6-6
4. Remove the two screws securing the motor and lift the
swing motor free of the flange. Remove and discard the
O-ring from the groove in the swing brake.
Installation
Use care when engaging the swing motor drive gear, do
not force the shaft to engage.
1. Install a new O-ring in the groove of the swing brake.
Position the swing motor on the swing brake, engaging
the shaft with the brake input shaft.
2. Apply Loctite 243 to the screw threads. Install the
screws and secure the motor to the brake housing.
Torque the screws see Fasteners and Torque Values (pg
1- 12).
3. Connect the hydraulic lines to the swing motor as tagged
during removal.
Test
1. Test swing of superstructure in each direction. Stop and
start swing several times.
2. Inspect for hydraulic leaks and repair as necessary.
Published 4-22-15, Control # 556-00
RT530E-2 SERVICE MANUAL
CAUTION