Inspect The Mast Wear Pads - Genie GR-20J Service Manual

September 2016
B-16

Inspect the Mast Wear Pads

Genie specifications require that this procedure be
performed every 250 hours or quarterly, whichever
comes first.
Mast wear pads should always be in good
condition and greased for good machine
performance and service life. A damaged wear
pads may cause the unsafe machine operation.
Note: Perform this procedure with the machine on
a firm, level surface that is free of obstructions.
Note: Perform this procedure in a location that is
sheltered from the wind.
1 Using the illustration as a guide, install a plumb
line of a suitable length onto the platform.
2 Using a suitable lifting device, place a
440 lbs / 200 Kg test weight in the center of the
platform. Secure the weight to the platform.
3 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
Note: Rotate the red Emergency Stop button at
platform control one quarter turn in a clockwise
direction to restore the power supply. The red
Emergency Stop button returns automatically to
the out, or on position.
Part No. 227656
Section 3 • Scheduled Maintenance Procedures
b
4 Raise the jib boom to a horizontal position.
5 Activate the mast up function and fully raise the
mast.
6 Using a suitable measuring device, measure
the distance between plumb line and the face of
the number 1 mast. Refer to illustration.
Result: The distance between the plumb line
and the face of the number 1 mast does not
exceed 66.9 inches / 1700 mm. The wear pads
are in good condition.
Result: The distance between the plumb line
and the face of the number 1 mast exceeds
66.9 inches / 1700 mm. The wear pads are not
in good condition. Install new wear pads. Refer
to Repair Procedure 4-1, How to Remove the
Mast Assembly.
GR-20J • GR-26J
CHECKLIST B PROCEDURES
a number 1 mast
b plumb line
a
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