Terex Genie AL5HT, Service Manual

Page: 62 / 94

Service Manual May 2015
Tower Components
52 AL5HT Part No. 1265482
3-7
How to Remove the Tower
Rotation Motor
Note: When removing a hose assembly or fitting,
the O-ring on the fitting and/or hose end must be
replaced and then torqued to specification during
installation. Refer to Section 2, Hydraulic Hose and
Fitting Torque Specifications.
Note: Perform this procedure with the tower in the
stowed position and the transport lock pin installed.
1 Tag, disconnect and plug the tower rotation
motor hydraulic hoses. Cap the fittings on the
motor.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
2 Remove the rotation motor pinion gear guard
fasteners. Remove the guard.
3 Remove the rotation motor mounting
fasteners.Remove the motor from the
machine.
Note: When installing a rotation motor, the gear
backlash will need to be adjusted. See How to
Adjust the Tower Rotation Gear Backlash.
3-8
How to Adjust the Tower Rotation
Gear Backlash
The rotation motor mounting fasteners are located
in slotted holes to allow the adjustment of gear
backlash between the motor pinion gear and the
rotation bearing ring gear. Proper backlash
adjustment is critical to safe machine operation and
component service life. An improper backlash
adjustment could decrease component service life
and may result in component damage.
Note: Perform this procedure with the tower in the
stowed position and the transport lock pin installed.
1 Loosen the tower rotation motor mounting
fasteners. Do not remove them.
2 Push the rotation motor towards the rotation
bearing as far as possible (this will push the
pinion gear into the rotation bearing ring gear).
3 Loosen the lock nut on the adjustment bolt.
4 Adjust the lock nuts until there is
approximately1/16 inch / 1.5 mm gap between
the end of the bolt and the rotation motor case.
Tighten the lock nuts of the adjustment bolt.
5 Rotate the rotation motor away from the
bearing until it contacts the adjustment bolt.
Torque the rotation motor fasteners to
specification. Refer to Section 2,
Specifications.
6 Rotate the tower through full range of
motion.Check for tight spots and binding.
Readjust if necessary.