Grove Published 11-22-2016, Control # 345-12 6-9
RT9130E-2 SERVICE MANUAL SWING SYSTEM
Swing Brake Assembly Maintenance
NOTE: Each swing brake assembly can be removed and
disassembled independently of the swing gearbox.
Removal
1. Engage the swing lock pin.
2. Tag and disconnect the hydraulic lines connected to the
swing motor and the swing brake assembly. Cap and/or
plug all openings.
3. Remove the swing motor from the swing brake
assembly per the procedure in this section.
4. While observing tension on the bolts due to internal
brake springs, unscrew socket head capscrews
securing the swing brake assembly to the gearbox.
Remove the brake assembly.
5. Remove and discard the O-ring from the swing brake
assembly housing.
6. Cover the opening of the swing gearbox to ensure no
dirt, dust or other foreign material get into the gearbox.
Installation
1. Install a new O-ring onto the brake assembly’s housing
and insert the brake assembly into the gearbox.
2. Secure the brake assembly with the socket head
capscrews.
3. Install the swing motor on the swing brake assembly per
the procedure in this section.
4. Connect the hydraulic lines to the swing motor and
swing brake assembly.
5. Bleed all air from the swing brake assembly.
Testing
1. With the Swing Brake Switch in the ON position, move
the swing control lever in both directions. Superstructure
rotation should not occur.
2. Put the Swing Brake Switch to OFF and swing the
superstructure in both directions. Use the swing brake
pedal to stop rotation.
3. Check for hydraulic leaks and repair as necessary.
Swing Gearbox Maintenance
Removal
1. Engage the swing lock pin.
2. Tag and disconnect the hydraulic lines from the swing
motor and the swing brake assembly. Cap and/or plug
all openings.
3. If necessary, remove the swing motor per instructions in
this section. Or, do so after removing entire swing box
assembly from superstructure.
4. If necessary, remove the swing brake assembly per
instructions in this section. Or, do so after removing
entire swing box assembly from superstructure.
NOTE: The swing gearbox with swing brake assembly and
swing motor attached weighs about 335 lb (about
150 kg).
5. Attach a suitable lifting device to the swing gearbox.
6. Remove the capscrews, flatwashers and bushings
securing the swing gearbox to the superstructure base
plate. Remove the swing gearbox.
7. Remove the counter-sunk allen bolts and bottom plate
attaching the pinion gear to the swing gearbox shaft.
Remove the pinion gear.
8. Cover the opening of the swing gearbox to ensure no
dirt, dust, or foreign material gets into the gearbox.
Installation
1. Install the pinion gear and bottom plate on the swing
gearbox splined shaft. Secure pinion gear with the
counter-sunk allen bolts.
2. Install the swing brake assembly on the swing gearbox
per instructions in this section.
3. Install the swing motor on the swing brake assembly per
instructions in this section.
4. Attach a suitable lifting device to the swing gearbox and
position the swing gearbox on the superstructure base
plate.
5. Install the capscrews, washers and bushings removed
earlier to secure the swing gearbox to the superstructure
base plate.
6. Connect the hydraulic lines to the swing brake.
7. Connect the hydraulic lines to the swing motor.
CAUTION
Oil can be hot and cause burns.
CAUTION
Oil can be hot and cause burns.
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