Section 4 • Repair ProceduresJanuary 2012
Part No. 228901 GS-30 • GS-32 • GS-46 • GS-47 4 - 9
GROUND CONTROLS
2-3
Manual Platform Lowering Cable
The manual platform lowering cable lowers the
platform in the event of a main power failure. The
manual platform lowering cable is attached to the
barrel end of the lift cylinder and is activated next
to the ground controls.
How to Adjust the Manual
Platform Lowering Cable
1 Raise the platform 7 to 8 feet / 2.1 to 2.4 m.
2 Lift the safety arm, move it to the center of the
scissor arm and rotate down to a vertical
position.
3 Lower the platform onto the safety arm.
Crushing hazard. Keep hands
clear of the safety arm when
lowering the platform.
4 Pull the handle of the manual platform lowering
cable out until considerable resistance is felt.
Release the handle.
5 Measure the distance between the base of the
handle and cable mounting nut.
Result: The measurement should be no greater
than
1
/8 inch / 3 mm.
a
b
c
d
f
g
e
N
Y7
Platform manual lowering cable specification
Gap, lowering handle to mounting nut 0 to
1
/8 inch
0 to 3 mm
Skip to step 8 if the measurement is correct.
6 To adjust, loosen the upper lock nut on the
cable mounting bracket at the cylinder. Turn the
lower lock nut clockwise to decrease the
distance or counterclockwise to increase the
distance. Tighten the upper lock nut.
a manual lowering cable sheath
b upper lock nut
c cable mounting bracket
d lower lock nut
e cable mounting nut
f end of the lowering cable
g manual lowering valve
(hydraulic schematic item N)
7 Repeat this procedure beginning with step 4.
8 Raise the platform and rotate the safety arm to
the stowed position.
9 Pull the manual lowering handle at the ground
controls 2 to 3 times to ensure it is functioning
correctly.
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