Test The Down Limit Switch And The Pothole Limit Switches - Terex Genie GS-1530 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-14
Test the Down Limit Switch and
the Pothole Limit Switches
Genie requires that this procedure be performed
every 250 hours or quarterly, whichever comes
first.
Maintaining the limit switches is essential to safe
operation and good machine performance.
Operating the machine with a faulty limit switch
could result in reduced machine performance and
a potentially unsafe operating condition.
Perform these procedures with the machine on a
firm, level surface that is free of obstructions.
Down Limit Switch
1 Remove the platform controls from the platform.
2 Raise the platform 7 to 8 feet / 2.1 to 2.4 m.
3 Lift the safety arm, move it to the center of the
scissor arm and rotate down to a vertical
position.
4 Lower the platform onto the safety arm.
Crushing hazard. Keep hands
clear of the safety arm when
lowering the platform.
5 Turn the key switch to the off position.
6 Tag and disconnect the platform control box at
the platform.
3 - 22
7 GS-1530/32 and GS-1930/32: Follow the
platform control cable down the scissor stack to
the alarm bracket on the chassis deck. Tag and
disconnect the platform control cable from the
ECM cable at the 6-pin Deutsch connector.
GS-2032, GS-2632, GS-3232, GS-2046,
GS-2646 and GS-3246: Follow the platform
control cable down the scissor stack to the
underside of the chassis deck. Tag and
disconnect the platform cable from the ECM
cable at the 6-pin Deutsch connector under
the chassis deck.
8 Securely install the platform control box harness
plug into the 6-pin Deutsch connector of the
ECM cable.
9 Disable the down limit switch. Loosen the
fastener securing the roller arm to the limit
switch, and rotate the roller arm 90 degrees in a
downwards direction. Do not activate the switch
contacts.
10 Turn the key switch to platform control.
11 Raise the platform and return the safety arm to
the stowed position.
12 Working at the platform controls, press the lift
function select button. Lower the platform to the
stowed position.
Result: The diagnostic display will show code
18, an alarm sounds and the lift function should
operate. The machine is functioning correctly.
Result: The diagnostic display does not show
code 18, the alarm does not sound and the lift
function should not operate. Replace the down
limit switch.
GS-30 • GS-32 • GS-46
June 2009
REV F
Part No. 96316