November 2016
Service and Repair Manual
Manifolds
Part No. 1272220GT
GS-2669 DC • GS-3369 DC • GS-4069 DC
63
lift function while observing the pressure
reading on the pressure gauge. Note the
pressure. Refer to Specifications,
Hydraulic
Component Specifications
.
26 Hold the lift relief valve (item 1) with a wrench
and remove the cap.
27 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
Tip-over hazard. Failure to adjust
the relief valves to specification
could result in the machine
tipping over, causing death or
serious injury. Do not adjust the
relief valve pressures higher
than specifications.
Repeat this procedure beginning with step 24 to
confirm the relief valve pressure.
28 Lower the platform to the stowed position.
29 Remove the weight from the platform.
30 Raise the platform approximately 10 feet / 3 m.
31 Lift the safety arm, move it to the center of the
scissor arm and rotate down to a vertical
position.
32 Lower the platform onto the safety arm.
33 Push in the red Emergency Stop button to the
off position.
34 Connect the harness to the lift cylinder
pressure switch.
35 Release the maximum height limit switch roller
head and connect the harness.
36 Pull out the red Emergency Stop button to the
on position and raise the platform
approximately 10 feet / 3 m.
37 Return the safety arm to the stowed position.
38 Lower the platform to the stowed position.
39 Push in the red Emergency Stop button to the
off position.
40 Press and hold the ground control scroll up
and scroll down buttons.
41 Pull out the red Emergency Stop button to the
on position at the ground controls.
Result: The ground controls LCD display will
show the following:
42 Release the Scroll Up and Scroll Down
buttons after the ground controller powers up.
43 At the ground controls, use the Scroll Down
button to scroll to SELECT OPTION.
Result: The ground controls LCD display will
show the following:
