Test The Drive Brakes; Test The Drive Speed - Stowed Position - Genie GS-3390 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-14

Test the Drive Brakes

Genie requires 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 B-7, Confirm the Proper
Brake Configuration .
1 Mark a test line on the ground for reference.
2 Start the engine from the platform controls.
3 Choose a point on the machine; i.e., contact
patch of a tire, as a visual reference for use
when crossing the test line.
4 Bring the machine to top drive speed before
reaching the test line. Release the function
enable switch on the control handle or release
the control handle when your reference point on
the machine crosses the test line.
5 Measure the distance between the test line and
your machine reference point. Refer to Section
2, Specifications.
Note: The brakes must be able to hold the machine
on any slope it is able to climb.
3 - 24
B-15
Test the Drive Speed -
Stowed Position
Genie requires that this procedure be performed
every 250 hours or quarterly, whichever comes
first.
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 controls and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
3 Start the engine from the platform controls.
4 Lower the platform to the stowed position.
5 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.
GS-3390 • GS-4390 • GS-5390
July 2007
REV G
Part No. 72863