SECTION 2 - PROCEDURES
2-20 3121801
2.12 LIMIT SWITCH ADJUSTMENT
Platform Limit Switch
The platform limit switch is located on the left side of the
frame of the machine. When activated, the switch cuts out the
High Drive function. Adjust the switch to activate when the
platform is raised above the stowed position.
2.13 PRESSURE SETTING PROCEDURES
NOTE: Make all pressure adjustments with the engine operating
and the hydraulic oil at normal operating temperature. In
addition, all functions must be operated from the platform
control station in order to achieve full pump speed. It may
be necessary to use an assistant to adjust the pressure set-
tings while operating the functions from the platform con-
trol station.
Main Pressure Adjustment
1. Install a pressure gauge at gauge port MP, located on
the front upper right side of the valve body. The port is
identified by a stamping on the valve body. Disconnect
lift-up solenoid connector.
2. From the Ground control panel, activate the lift up func-
tion.
3. Bottom out the Lift Up function and adjust the main
pressure to 228 bar (3300 psi). Reconnect lift-up sole-
noid connector.
Lift Relief Adjustments
4. Install a pressure gauge at gauge port MP, located on
the front upper right side of the valve body. The port is
identified by a stamping on the valve body.
5. From the platform control station, activate the Lift Up
function by selecting the lift control switch and posi-
tioning the joystick to the up position.
6. Bottom out the Lift Up function and adjust the Lift Up
relief to 193 bar (2800 psi).
7. Remove the pressure gauge from gauge port MP.
Steer Relief Adjustment
1. Install a pressure gauge at gauge port MP, located on
the lower right side of the valve body. The port is identi-
fied by a stamping on the valve body.
2. Activate the Steer Right function and check Steer pres-
sure. If necessary, adjust Steer pressure to 159 bar (2300
psi).
3. Activate the Steer Left function and check Steer pres-
sure. If necessary, adjust Steer pressure to 110 bar (1600
psi).
4. Remove the pressure gauge from gauge port MP.
Leveling Jack Relief Adjustment
5. Refer to Figure 2-20., Main Valve Block.
6. Install a pressure gauge, 345 bar (5000 psi) or higher, at
port MP on the main valve block. Start the engine and
activate jack retract.
7. When all jacks are retracted the gauge should read 172
bar (2500 psi).
8. Adjust the relief valve located on the leveling jack direc-
tional valve (refer to Figure 2-21.) clockwise to increase,
counter-clockwise to decrease. (The relief valve is on the
same face as the solenoid valves).
9. Remove the pressure gauge from gauge port MP.
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