Apply a light coat of NEVER-SEEZ (paste-
type) lubricant on the flange of the motor.
The three sections that make up the
Place a new lubricated O-ring on the top of the
swing gearbox assembly are held
together by flanges and bolts. Prior to
separation, fine scribe lines should be
Fill the brake assembly. Refer to Chapter
made at each joint to serve as an
One, Section 4 - LUBRICATION.
alignment guide on assembly. Proceed
with removal of bolts. If sections resist
Insert the shaft of the motor into the brake and
separation, tap on sides with fiber or
push it into position.
rubber mallet. DO NOT use a pry bar to
Refer to SWING MOTOR - REMOVAL in this
Both shafts must slide together freely.
section and remove the swing motor.
Do not use bolts to force the units
Refer to SWING BRAKE - Removal in this
section and remove the swing brake.
Insert the mounting bolts through the motor
flange, the brake, and the threaded hole in the gear
Remove the nine bolts securing the swing
reducer mounting flange. Ensure the bolts are not
gearbox assembly to the mounting plate on the
so long that they bottom out in the reducer before
superstructure base plate.
Use a suitable lifting device and remove the
To prevent binding alternately tighten the bolts
swing gearbox from the superstructure.
until snug. Torque the bolts to 35 lbs-ft (47.4 Nm).
10. Connect the hydraulic lines to the brake
housing and motor.
Refer to SWING BRAKE - Installation in this
section and install the swing brake.
Refer to SWING MOTOR - INSTALLATION in
this section and install the swing motor.
Ensure the turntable lock pin is installed.
Using an adequate lifting device, lift and
position the assembly onto the superstructure.
Disconnect and tag the hydraulic lines from the
swing motor and swing brake.
Apply medium strength thread locking
adhesive to threads of bolts and install the nine
grade 5 bolts securing the swing gearbox to the
mounting plate on the superstructure base plate.
The swing motor and swing brake may
Torque the bolts to 110 lbs-ft (149.1 Nm).
or may not be removed at this time. If
not removing at this time, proceed to
Connect the hydraulic lines to the swing motor
and brake as tagged during removal.