Genie GR-26J, Руководство по обслуживанию

Страница: 80 / 119

Section 4 • Repair Procedures
4 - 34 GR-20J • GR-26J Part No. 227656
September 2016
FUNCTION MANIFOLD
How to Adjust the Platform Lift
Relief Valve
Note: Be sure that the hydraulic oil level is at the
FULL
mark on the hydraulic tank.
1 Block the wheels at the steer end of the
machine.
2 Using a suitable lifting device, place a
660 lbs / 300 Kg test weight in the center of the
platform. Secure the weight to the platform.
3 Locate the lift relief valve on the function
manifold (schematic item G).
4 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
Note: Rotate the red Emergency Stop button at
platform control one quarter turn in a clockwise
direction to restore the power supply. The red
Emergency Stop button returns automatically to
the out, or on position.
5 Press and hold the function enable button.
6 Press and hold the lift function button and raise
the platform approximately 12 inches / 30 cm.
Result: The platform should lift the weight.
Proceed to step 12.
Result: The platform does not lift the weight.
Proceed to step 7.
Component damage hazard. Do
not continue to operate the
machine if the hydraulic pump is
cavitating.
7 Turn the key switch to the off position.
8 Hold the lift relief valve with a wrench and
remove the cap (schematic item G).
b
a
a lift relief valve
b system relief valve
9 Adjust the internal hex socket. Turn it clockwise
to increase the pressure. Install the relief valve
cap.
10 Turn the key switch to ground control.
11 Repeat the procedure beginning with step 5.
12 Lower the platform to the stowed position.
13 Turn the key switch to the off position.
14 Adjust the internal hex socket. Turn it
counterclockwise to decrease the pressure just
until the platform will not lift the weight. Install
the relief valve cap.
15 Turn the key switch to the ground control.
16 Activate the platform up function and attempt to
raise the platform.
Result: The platform does not lift the weight.
Proceed to step 18.
Result: The platform lifts the weight. Proceed to
step 12.
17 Turn the key switch to the off position and
remove the weight from the platform.