Test The Drive Brakes; Test The Drive Speed - Stowed Position - Genie Z-30/20N Service Manual

April 2005
REV B
B-9

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 they
are actually not fully operational.
Collision hazard. Be sure that the
machine is not in free-wheel or
partial free-wheel configuration.
Refer to B-5, Confirm the Proper
Brake Configuration .
Select a test area that is firm, level
and free of obstructions.
1 Mark a test line on the ground for reference.
2 Lower the boom to the stowed position.
3 Turn the key switch to platform controls.
4 Choose a reference point on the machine; i.e.,
contact patch of a tire, as a visual reference for
use when crossing the test line.
5 Bring the machine to top drive speed before
reaching the test line. Release the drive joystick
when your reference point on the machine
crosses the test line.
6 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.
Part No. 106373
Section 3 • Scheduled Maintenance Procedures
B-10
Test the Drive Speed -
Stowed Position
Proper drive function movement is 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 Choose a reference point on the machine; i.e.,
contact patch of a tire, as a visual reference for
use when crossing the start and finish lines.
4 Bring the machine to maximum drive speed
before reaching the start line. Begin timing
when your reference point on the machine
crosses the start line.
5 Continue at full speed and note the time when
your machine reference point passes over the
finish line. Refer to Section 2, Specifications.
Genie Z-30/20N
CHECKLIST B PROCEDURES
Select a test area that is firm, level
and free of obstructions.
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