6-5
Published 10-01-2020 Control # 699-00
GRT9165 SERVICE MANUAL SWING SYSTEM
4. Remove bolts (3) securing the brake (1) to gearbox (2).
Remove brake assembly (1).
5. Remove and discard the O-ring (4) from the brake
housing.
6. Cover swing gearbox opening to ensure no debris, such
as dirt and dust, gets into the gearbox.
Installation
1. Install a new O-ring (4) onto the brake (1) housing and
insert the brake assembly into the gearbox (2). Secure
with the capscrews (3).
2. Install swing motor into the swing brake. For more
information, see Swing Motor, page 6-4.
3. Connect hydraulic lines to the motor and brake.
4. Bleed air from brake assembly.
Testing
1. With Swing Brake switch in the ON position, position the
swing joystick in both directions. Superstructure rotation
should not occur.
2. Position Swing Brake switch to OFF and swing
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 turntable lock pin.
2. Tag and disconnect hydraulic lines from swing motor
and swing brake. Cap and/or plug all openings.
3. Remove capscrews (11), washers (12), and pinion guard
(10) as necessary.
NOTE: Gearbox assembly with motor weighs
approximately 126 kg (277.8 lb).
4. Attach a suitable lifting device to the swing gearbox.
Remove capscrews (13), washers (14), and bushings
(15) securing gearbox to the superstructure.
5. Remove the swing gearbox.
6. If necessary, remove the swing motor. For more
information, see Swing Motor, page 6-4.
7. If necessary, remove the swing brake. For more
information, see Swing Brake, page 6-4.
8. Cover the swing gearbox opening to ensure no debris,
such as dirt and dust, gets into the gearbox.
Installation
1. If removed, install the swing brake. For more
information, see Swing Brake, page 6-4.
2. If removed, install the swing motor. For more
information, see Swing Motor, page 6-4.
3. Attach a suitable lifting device to the swing gearboxes
and lift and position the swing gearboxes in place on the
mounting plate. Adjust the pinions as necessary so the
pinions mesh with the turntable bearing.
4. Install capscrews (13), washers (14), and bushings (15).
Torque capscrews 97.2 N-m to 102.4 N-m (71.7 lb-ft to
75.5 lb-ft). Refer to Fasteners and Torque Values, page
1-16 for proper torque value.
5. Install pinion guard (10) with washers (12) and
capscrews (11).
6. Connect hydraulic lines to the swing brake.
7. Connect hydraulic lines to the swing motor.
8. Service gearbox as indicated under Servicing.
Servicing
As with all highly stressed mechanisms, reasonable
operating procedures are always required. Normal
maintenance should only consist of proper lubrication and a
periodic check of mounting bolt torque values. For more
information about oil specifications, see Lubricants and
Lubrication Intervals, page 9-1.
Change the oil as follows.
1. Unscrew drain plug (8, Figure 6-1). Remove fill plug and
dipstick(2) to ensure all oil has been removed.
2. Flush case with a light flushing oil.
NOTE: Cleaning gearbox with a solvent is recommended
to prevent accumulation of grit and grime. Avoid
steam cleaning where moisture and dirt might be
driven into the swing bearing.
3. After oil is drained, replace drain plug (8) and fill plug
and dipstick (1) any other plugs removed to drain oil.
4. To refill with oil, make sure breather is open. Fill to
proper location on dipstick (2).
5. Tighten dipstick (2).
Checking the Oil Level
1. Check level on dipstick (2).
2. If no lubricant is visible on dipstick, add oil until between
minimum and maximum on dipstick.
3. Replace dipstick(2) in brake housing.
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