SWING SYSTEM TMS700E SERVICE MANUAL
6-8 Published 01-29-2015, Control # 512-01
5. 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 securing the pinion gear to the
output shaft and remove the pinion gear.
NOTE: The complete gearbox assembly with motor
weighs approximately 155 kg (342 lb).
4. Attach a suitable lifting device to the swing gearbox.
Remove the hex head screws, 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,
page 6-7, Removal.
7. If necessary, remove the swing brake according to the
procedures found in this Section under Swing Brake,
page 6-7, 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,
page 6-7, Installation.
2. If removed, install the swing motor according to the
procedures found in this Section under Swing Motor,
page 6-7, 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 hex head screws, washers and bushings.
Tighten screws; refer to Fasteners and Torque Values,
page 1-12 for the torque value for the mounting screws.
5. Install the pinion gear on the output shaft and secure
with three bolts; refer to Fasteners and Torque Values,
page 1-12 for the torque value.
6. Connect the hydraulic lines to the swing brake.
7. Connect the hydraulic lines to the swing motor.
8. Service the 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. Lubrication
consists of maintaining the gearbox oil level. Oil in a new
gearbox should be drained, flushed out and replaced after
approximately 250 hours of operation, and replaced with
premium quality SSGL-5 after approximately 500 hours of
operation or each year, whichever occurs first. Refer to
Lubrication, page 9-1. Operation in high humidity or polluted
air areas will require more frequent changes to minimize
moisture or contaminate accumulation. Change the oil as
follows.
1. Unscrew the drain plug; and to ensure all oil has been
removed, unscrew filler and level plugs.
2. After oil is drained, replace the drain plug and insert oil
through filler plug until it begins to flow out of level plug.
3. Install and tighten the level and filler plugs.
Testing
1. Test swing of superstructure in each direction. Stop and
start swing several times.
2. Inspect for hydraulic leaks and repair as necessary.
SWING BEARING
Description
The swing bearing is an anti-friction roller bearing that mates
the Superstructure to the Carrier. The bearing inner race is
bolted to the Superstructure and the outer race is bolted to
the Carrier. The inner race contains two grease fittings for
lubrication of the bearing which are hosed to two fittings at
the front of the turntable center section. The outer race also
contains two grease fittings and incorporates gear teeth that
mesh with the pinion gear of the swing gearbox to provide
rotation.
Maintenance
General
The swing bearing is the most critical maintenance point of
the crane. It is here, at the centerline of rotation, that
stresses of loads are concentrated. In addition, the bearing
provides the only attachment between the superstructure
and carrier. Therefore, proper care of the bearing and
periodic maintenance of the turntable-to-bearing attach bolts
-IS A MUST -to ensure safe and efficient operation.
Reference Only
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