6-8
Published 01-14-2021 Control # 707-01
SWING SYSTEM
TMS9000-2 SERVICE MANUAL
Swing Gear Brake Function Check
A function test must be carried out on the swing gear service
brake to check the wear on the swing gear brake plates. This
involves swing movement against the swing gear service
brake.
•
Release the slewing gear holding brake by pressing the
slewing gear holding brake rocker switch upwards.
•
The slewing gear holding brake indicator lamp goes out.
•
Push the slewing gear service brake pedal down and
hold it.
•
Activate the slewing gear. Slowly steer the left control
lever to the left or to the right.
If the superstructure turns, the swing gear service brake
plates are worn and must be replaced immediately.
•
The plates must only be replaced by Manitowoc Crane
Care.
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 lbs (about
150 kg).
5.
Attach a suitable lifting device to the swing gearbox.
WARNING
Overturning when Rotating the Superstructure
Hazard!
The truck crane must be on outriggers before rotating the
superstructure. Read the notes in the chapter
Crane work
w i t h t h e m a i n b o o m – s l e w i n g
in th e
O p e r a t i n g
instructions
before checking for proper function.
CAUTION
Personal Injury Hazard!
Hydraulic fluid can be hot and cause burns. Always wear
gloves and allow the hydraulic system to cool.
CAUTION
Personal Injury Hazard!
Hydraulic fluid can be hot and cause burns. Always wear
gloves and allow the hydraulic system to cool.
Fo
r
Reference
Only
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