Genie GR-12 Service Manual page 44

Section 3 • Scheduled Maintenance Procedures
CHECKLIST D PROCEDURES
3 GR-12 and GR-15: Visually inspect the top of
each column for clearance between the roller
wheels and the adjacent column surface.
GR-20: Visually inspect the top of each column
for clearance between the slider block and the
adjacent column surface.
Result: There should be an equal amount of
distance between the roller wheel/slider block
and the column on each side.
If mast inspection results in a
measurement that is not within
specification, refer to Repair
procedure 3-2, How to Adjust the
Glide Pads.
4 Loosen but do not remove the adjustment nut
on the sequencing cable located at the top of
the first column.
5 Raise the platform approximately 3 feet / 1 m
above the top of the drive chassis.
6 Place a jack stand on the top of the battery
cover, centered under the platform. Adjust the
jack stand height to 24 inches / 60 cm.
7 Lower the platform onto the jack stand just
enough to take the weight off the lifting chains.
Crushing hazard. Keep hands
clear of the jack stand when
lowering the platform.
3 - 28
8 Inspect each idler wheel for the following:
· Excessive wear on the side flanges
· Unusual wear
· Movement side to side in excess of
0.040 inch / 1 mm
· Any wheel movement front to back
9 GR-20: Inspect each wear pad for the following:
· Excessive or unusual wear
10 Raise the platform slightly and remove the jack
stand. Lower the platform to the stowed
position.
11 Install the mast covers and adjust the
sequencing cable. See B-6, Adjust the
Sequencing Cables.
GR-12 • GR-15 • GR-20
November 2005
If idler wheel inspection results in
a condition that is not within
specification, refer to Repair
procedure 3-1, How to Assemble
the Mast.
If a wear pad displays excessive
or unusual wear, refer to Repair
procedure 3-1, How to Assemble
the Mast.
Part No. 84700
REV B