TM 5-3810-307-24-1-1
SWING GEARBOX AND BRAKE
DESCRIPTION
SWING GEARBOX.
The swing gearbox and brake, used in conjunction
with the swing motor, provides the rotating force to
move the swing bearing for superstructure rotation
The swing gearbox is bolted to the superstructure
and the means of stopping the bearing to prevent
base plate, and its pinion gear meshes with the ring
swing.
gear of the turntable bearing to rotate the turntable.
The swing brake is installed on top of the gearbox
SWING BRAKE.
and the swing motor is mounted on the brake. The
swing motor drives the gearbox through the brake
The multi-disc swing brake assembly is mounted
assembly.
The swing gearbox utilizes double
between the swing motor and the swing gearbox.
reduction planetary gearing which results in a
The brake mechanism is a disc pack that is
component circular unit of high strength and
hydraulically released and spring applied. The brake
efficiency. The round gear case with horizontal
has one hydraulic port.
rotating gears ensures lubricant circulation.
MAINTENANCE
NOTE
For more detailed information, refer to the applicable SM package.
NOTE
The swing brake can be removed and disassembled independently of the
swing gearbox.
SWING BRAKE.
6.
Carefully remove the brake assembly.
Removal.
7.
Cover the brake port and the opening to
ensure that no dirt, dust, etc., gets into the gearbox.
1.
Ensure that the turntable lock pin is installed.
Scribe a line along the sides of the motor, brake, and
8.
Remove and discard the O-ring between the
gearbox to aid in correct alignment at assembly.
brake and the gearbox.
2.
Disconnect and tag all hydraulic lines to the
Installation.
motor and the brake. Cap or plug all openings.
1.
Lightly coat the mounting face of the brake and
3.
Remove the motor. Refer to SWING MOTOR
the shaft splines with NEVER-SEEZ (paste-type)
- REMOVAL in this section.
lubricant.
4.
Remove the bolts and washers securing the
2.
Place a new, lubricated O-ring on the top of the
brake to the gear housing cover. Remove the brake.
gear reducer.
5.
Remove and discard the O-ring between the
3.
Insert the brake shaft into the gear reducer.
motor and the brake.
