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

Service Manual
Checklist B Procedures
B-8

Test the Drive Brakes

Genie specifications require that this procedure be
performed every 250 hours or quarterly, whichever
comes first.
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 maintenance procedure,
Confirm the Proper Brake
Configuration.
Note: 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 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
Specifications, Performance Specifications.
Note: The brakes must be able to hold the machine
on any slope it is able to climb.
28
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
B-9
Test the Drive Speed – Stowed
Position
Genie specifications require that this procedure be
performed every 250 hours or quarterly, whichever
comes first.
Proper drive function 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.Note: Select
a test area that is firm, level and free of
obstructions.
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 boom to the stowed position.
4 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.
5 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.
6 Continue at full speed and note the time when
the machine reference point crosses the finish
line. Refer to Specifications, Performance
Specifications.
April 2016
Part No. 139378