Test The Drive Brakes; Test The Drive Speed - Stowed Position - Genie GR-8 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-10

Test the Drive Brakes

Proper brake action is essential to safe machine
operation. The drive brake function should operate
smoothly, free of hesitation, jerking and unusual
noise. Hydraulically-released individual wheel
brakes can appear to operate normally when not
fully operational.
Perform this procedure with the
machine on a firm, level surface
that is free of obstructions.
Be sure the platform extension
deck is fully retracted and the
platform is in the stowed position.
1 Mark a test line on the ground for reference.
2 Turn the key switch to platform control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
3 Lower the platform to the stowed position.
4 Move the lift/drive toggle switch to the drive
position.
5 Press the drive speed button (if equipped) until
the high speed (rabbit) light is illuminated.
6 Choose a point on the machine; i.e., contact
patch of a tire, as a visual reference for use
when crossing the test line.
7 Bring the machine to top drive speed before
reaching the test line. Release the function
enable switch or the joystick when your
reference point on the machine crosses the test
line.
8 Measure the distance between the test line and
your machine reference point. Refer to Section
2, Specifications .
The brakes must be able to hold
the machine on any slope it is able
to climb
3 - 14
B-11
Test the Drive Speed -
Stowed Position
Proper drive functions are essential to safe
machine operation. The drive function should
respond quickly and smoothly to operator control.
Drive performance should also be free of
hesitation, jerking and unusual noise over the
entire proportionally controlled speed range.
1 Create start and finish lines by marking two
lines on the ground 40 feet / 12.2 m apart.
2 Turn the key switch to platform control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
3 Lower the platform to the stowed position.
4 Move the lift/drive toggle switch to the drive
position.
5 Press the drive speed button (if equipped) until
the high speed (rabbit) light is illuminated.
6 Choose a point on the machine; i.e., contact
patch of a tire, as a visual reference for use
when crossing the start and finish lines.
7 Bring the machine to top drive speed before
reaching the start line. Begin timing when your
reference point on the machine crosses the
start line.
8 Continue at full speed and note the time when
your reference point on the machine passes
over the finish line. Refer to Section 2,
Specifications .
GR-8 • GR-12 • GR-15
August 2005
Perform this procedure with the
machine on a firm, level surface
that is free of obstructions.
Part No. 72965
REV B