Service manual

7 - 40 Genie GS-1530 & Genie GS-1930 Part No. 39528
Service Manual - First Edition
Section 7 - Repair Procedures
6-2
Valve Adjustments -
Function Manifold
How to Adjust the Function
Relief Valve
Be sure that the hydraulic oil level
is between the FULL and ADD marks
on the oil level indicator decal.
1 Open the hydraulic power unit module tray and
locate the function relief valve on the function
manifold.
2 Place maximum rated load into the platform.
Secure the load to the platform.
Maximum Capacity
GS-1530 600 lbs 272 kg
GS-1930 500 lbs 227 kg
3 Hold the function relief valve with a wrench and
remove the cap (item 4, function manifold).
4 While activating the platform up function, adjust
the internal hex socket clockwise, just until the
platform begins to raise.
5 Fully lower the platform.
6 Add an additional 50 pounds (22.7 kg) to the
platform. Secure the additional weight.
7 Raise the platform slightly.
8 The power unit should not be able to lift the
platform. If the power unit lifts the platform,
adjust the internal hex socket counterclockwise
until the adjustment is correct.
9 Install the relief valve cap.
FUNCTION MANIFOLD
10 Bleed the hydraulic system by raising the
platform to full height. If the pump cavitates or
platform fails to reach full height, add hydraulic
oil until the pump is functioning correctly. Do
not overfill the hydraulic reservoir.
Component damage hazard. Do
not continue to operate the
machine if the hydraulic pump is
cavitating.
How to Adjust the Steering Relief
Valve
1 Open the hydraulic power unit module tray and
locate the steering relief valve on the function
manifold.
2 Connect a 0 to 5000 psi (0 to 350 bar) pressure
gauge to the test port on the function manifold.
3 Turn the key switch to ground control and pull
out the Emergency Stop button to the ON
position at both the ground and platform
controls.
4 Activate the function enable switch and press
and hold the steer thumb rocker switch to the
right. Allow the wheels to completely turn to the
right, then continue holding the switch while
observing the pressure reading on the pressure
gauge. Note the pressure.
5 Press and hold the steer thumb rocker switch to
the left. Allow the wheels to completely turn to
the left, then continue holding the switch while
observing the pressure reading on the pressure
gauge.
6 Turn the machine off. Hold the steer relief valve
with a wrench and remove the cap
(item 3, function manifold).