Test The Drive Brakes; Test The Drive Speed - Stowed Position - Genie S-80 Service Manual

February 2012
B-18

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.
See B-7, Confirm the Proper Brake
Configuration .
Note: Select a test area that is firm, level and free
of obstructions.
Note; Perform this procedure with the boom in the
stowed position.
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 drive
controller 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.
Part No. 122985
Section 3 • Scheduled Maintenance Procedures
B-19
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 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.
Note: Select a test area that is firm, level and free
of obstructions.
Note: Perform this procedure with the boom in the
stowed position.
1 Create start and finish lines by marking two lines
on the ground 40 feet / 12.2 m apart.
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 start and finish lines.
4 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.
5 Continue at full speed and note the time when
the machine reference point crosses the finish
line. Refer to Section 2, Performance
Specifications .
Note: To adjust the speed, refer to Repair
procedure 1-2, How to Adjust the Joystick Max-out
Setting.
S-80 • S-85 • S-80X
CHECKLIST B PROCEDURES
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