Genie S-80HF Maintenance Manual page 166

Maintenance Manual
Programmed Maintenance Procedures
Steer or Square-end wheels: 4WD Models
7 Chock the non-steer / circle-end wheels or
tracks to prevent the machine from rolling.
8 Models with 2 wheel steer: Center a lifting
jack of ample capacity (20,000 lbs / 10,000 kg)
under the drive chassis between the steer
tires.
Models with 4 wheel steer: Place a lifting
jack of ample capacity (35,000 lbs / 16000 kg)
under each of the steer yokes at the
square-end of the machine.
9 Lift the wheels or tracks off the ground and
then place jack stands under the drive chassis
for support.
10 Disengage the drive hubs by turning over the
drive hub disconnect caps on each steer /
square-end wheel hub.
1 brake disengaged position
2 brake engaged position
11 Manually rotate each steer / square-end wheel
or track.
Result: Each steer / square-end wheel or track
should rotate with minimum effort.
Note: TRAX Models: Due to the additional
components of the track system, which increase
rotational friction, the track may not be able to be
rotated manually.
152
12 Re-engage the drive hubs by turning over the
hub disconnect caps. Rotate each wheel or
track to check for engagement. Raise the
machine, remove the jack stands and lower
the machine.
Models with Hydraulic Pump free-wheel valve:
13 Be sure the free-wheel valve on the drive
pump is closed (clockwise).
Note: The free-wheel valve should always remain
closed.
Note: The location of the free-wheel valve may vary
by model.
S ® Booms • Z ® Booms
Collision hazard. Failure to
re-engage the drive hubs could
result in death or serious injury
and property damage.
1 drive pump
2 screwdriver
3 lift pump
4 free-wheel valve
Part No. 1268489GT
October 2018