November 2021 Maintenance Manual
Quarterly Maintenance Procedures
Part No. 1305686GT Scissor Lifts 47
13 Attempt to drive and steer the machine.
Result: The ground controls LCD displays
"PHS: POTHOLE GUARDS STUCK" and the
platform controls LED displays "PHS". The
alarm sounds, and the drive and steer
functions do not operate. The machine is
functioning properly.
Result: The ground controls LCD does not
display "PHS: POTHOLE GUARDS STUCK"
and the platform controls LED does not
display "PHS". The alarm does not sound,
and the steer and drive functions operate.
Replace the down limit switch.
14 GS-55: Raise the platform approximately
9 feet / 2,8 m.
All other models: Raise the platform to
approximately 1 ft / 30 cm.
Result: The ground controls LCD displays
"PHS: POTHOLE GUARDS STUCK" and the
platform controls LED displays "PHS". The
alarm sounds. The machine is functioning
properly.
Result: The ground controls LCD does not
display "PHS: POTHOLE GUARDS STUCK"
and the platform controls LED does not
display "PHS". The alarm does not sound.
Replace the down limit switch.
15 GS-55: Raise the platform approximately
13 feet / 4 m.
All other models: Raise the platform 7 to
8 feet / 2,1 to 2,4 m.
16 Lift the safety arm, move it to the center of the
scissor arm and rotate down to a vertical
position.
17 Lower the platform onto the safety arm.
Crushing hazard. Keep hands
clear of the safety arm when
lowering the platform.
18 Turn the selector/key switch to the off
position.
19 Enable the down limit switch. Loosen the
fastener securing the roller arm to the limit
switch, and rotate the roller arm 90 degrees in
a upwards direction. Do not activate the
switch contacts.
20 Turn the selector/key switch to ground control.
21 Raise the platform and rotate the safety arm
to the stowed position.
22 Lower the platform to the stowed position.