Test The Drive Brakes - Genie ZX-135/70 Service Manual

August 2014
B-13

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 Start the engine from the platform controls.
3 Press the engine rpm select button until the
foot switch activated high idle (rabbit symbol)
is selected, then lower the boom into the
stowed position.
Part No. 218700
Checklist B Procedures
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
controller 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.
ZX-135/70
Service Manual
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