6-8
Published 11/26/2014, Control # 447-05
SWING SYSTEM
RT770E
SWING GEARBOX AND BRAKE
Description
The Swing Gearbox and Brake (Figure 6-1), used in
conjunction with the Swing Motor, rotates and stops the
superstructure. A pedal on the cab floor is used to activate
the Swing Brake. The Swing Gearbox is bolted to the
superstructure base plate, and its pinion gear meshes with
the ring gear of the turntable bearing to rotate the turntable.
The Swing Gearbox utilizes double reduction planetary
gearing. The multi-disc swing brake assembly is an integral
part of the Swing Gearbox and is located between the swing
Motor and the swing Gearbox. The brake mechanism is a
disc pack that is hydraulically released and spring applied.
Maintenance
NOTE:
The Swing Brake can be removed and
disassembled independently of the Swing
Gearbox.
Swing Brake
Removal
1.
Engage the turntable lock pin.
2.
Tag and disconnect the hydraulic lines connected to the
swing motor and the brake. Cap and/or plug all
openings.
3.
Remove the swing motor from the swing brake
according to the procedures found in this Section under
Swing Motor - Removal.
4.
Remove the bolts and washers securing the brake to the
gearbox. Remove the brake assembly.
5.
Remove and discard the O-ring from the brake housing.
6.
Cover the opening of the swing gearbox to ensure no
dirt, dust, etc., gets into the gearbox.
Installation
1.
Install a new O-ring onto the brake housing and insert
the brake assembly into the gearbox. Secure with the
eight socket head capscrews.
2.
Install the swing motor into the swing brake according to
the procedures found in this Section under Swing Motor
- Installation.
3.
Connect the hydraulic lines to the motor and brake.
4.
Bleed all air from the brake assembly.
Testing
1.
With the Swing Brake switch in the ON position, position
the swing control lever in both directions. Superstructure
rotation should not occur.
2.
Position 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.
Gearbox
Removal
1.
Engage the turntable lock pin.
2.
Tag and disconnect the hydraulic lines from the swing
motor and swing brake. Cap and/or plug all openings.
3.
Remove the three bolts attaching the pinion gear to the
output shaft and remove the pinion gear.
NOTE:
The complete gearbox assembly with motor
weighs approximately 150 kg (333 lb).
4.
Attach a suitable lifting device to the swing gearbox.
Remove the capscrews, washers and bushings securing
the gearbox to the mounting plate.
5.
Remove the swing gearbox.
6.
If necessary, remove the swing motor according to the
procedures found in this Section under Swing Motor -
Removal.
7.
If necessary, remove the swing brake according to the
procedures found in this Section under Swing Brake
Removal.
8.
Cover the opening of the swing gearbox to ensure no
dirt, dust, etc., gets into the gearbox.
Installation
1.
If removed, install the swing brake according to the
procedures found in this Section under Swing Brake -
Installation.
2.
If removed, install the swing motor according to the
procedures found in this Section under Swing Motor -
Installation.
3.
Attach a suitable lifting device to the swing gearbox and
lift and position the swing gearbox in place on the
mounting plate.
4.
Install the capscrews, washers and bushings. Torque
capscrews; refer to
1-16 for proper torque value.
5.
Install the pinion gear on the output shaft and secure
with three bolts. Torque to 70.2 Nm to 85.2 Nm (52 lb-ft
to 63 lb-ft).
Содержание Grove RT770E
Страница 3: ...Service Maintenance Manual Grove RT770E ...
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Страница 40: ...INTRODUCTION RT770E SERVICE MANUAL 1 26 Published 11 26 2014 Control 447 05 THIS PAGE BLANK ...
Страница 124: ...HYDRAULIC SYSTEM RT770E 2 84 Published 11 26 2014 Control 447 05 THIS PAGE BLANK ...
Страница 126: ...ELECTRICAL SYSTEM RT770E SERVICE MANUAL 3 2 Published 11 26 2014 Control 447 05 FIGURE 3 1 7983 ...
Страница 149: ...4 5 Published 11 26 2014 Control 447 05 RT770E SERVICE MANUAL BOOM 4 GROVE FIGURE 4 2 ...
Страница 150: ...BOOM RT770E SERVICE MANUAL 4 6 Published 11 26 2014 Control 447 05 FIGURE 4 2 continued ...
Страница 151: ...4 7 Published 11 26 2014 Control 447 05 RT770E SERVICE MANUAL BOOM 4 GROVE FIGURE 4 2 continued ...
Страница 152: ...BOOM RT770E SERVICE MANUAL 4 8 Published 11 26 2014 Control 447 05 FIGURE 4 2 continued ...
Страница 153: ...4 9 Published 11 26 2014 Control 447 05 RT770E SERVICE MANUAL BOOM 4 GROVE FIGURE 4 2 continued ...
Страница 154: ...BOOM RT770E SERVICE MANUAL 4 10 Published 11 26 2014 Control 447 05 FIGURE 4 2 continued ...
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Страница 300: ...UNDERCARRIAGE RT770E 8 24 Published 11 26 2014 Control 447 05 FIGURE 8 28 ...
Страница 321: ...9 9 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE 7114 17 1 4 2 7114 20 7114 10 3 FIGURE 9 1 ...
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Страница 336: ...LUBRICATION RT770E 9 24 Published 11 26 2014 Control 447 05 72 73 74 73 74 72 73 74 73 74 FIGURE 9 8 8133 ...
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