Test The Platform Self-Leveling; Test The Drive Brakes - Genie S-40 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-16

Test the Platform Self-leveling

Genie specifications require that this procedure be
performed every 250 hours or quarterly, whichever
comes first.
Automatic platform self-leveling throughout
the full cycle of primary boom raising and lowering
is essential for safe machine operation. The
platform is maintained at level by the platform
leveling slave cylinder which operates in a closed
loop hydraulic circuit with the master cylinder
located at the base of the boom.
A platform self-leveling failure creates an unsafe
working condition for platform and ground
personnel.
1 Start the engine from the ground controls and
lower the boom to the stowed position.
2 Hold the function enable toggle switch to either
side and adjust the platform to a level position
using the platform level toggle switch.
3 Raise and lower the primary boom through a full
cycle.
Result: The platform should remain level at
all times to within ±5 degrees.
3 - 28
B-17

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. Hydrostatic brakes and hydraulically-
released individual wheel brakes can appear to
operate normally when they are actually not fully
operational.
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 Move the engine idle control switch to
foot switch activated high idle (rabbit and
foot switch symbol), then lower the boom into
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 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.
Note: The brakes must be able to hold the machine
on any slope it is able to climb.
S-40 • S-45
October 2013
Collision hazard. Be sure that the
machine is not in free-wheel or
partial free-wheel configuration.
See B-10, Confirm the Proper
Brake Configuration .
Part No. 102521