Oshkosh Corporation JLG 260MRT, Service Maintenance Manual

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SECTION 2 - PROCEDURES
3121801 – JLG Lift – 2-19
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 oper-
ating and the hydraulic oil at normal operating tem-
perature. 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 settings while oper-
ating the functions from the platform control 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
function.
3. Bottom out the Lift Up function and adjust the main
pressure to 228 bar (3300 psi). Reconnect lift-up
solenoid connector.
Lift Relief Adjustments
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.
2. 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.
3. Bottom out the Lift Up function and adjust the Lift Up
relief to 193 bar (2800 psi).
4. 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
identified by a stamping on the valve body.
2. Activate the Steer Right function and check Steer
pressure. If necessary, adjust Steer pressure to 159
bar (2300 psi).
3. Activate the Steer Left function and check Steer
pressure. If necessary, adjust Steer pressure to 110
bar (1600 psi).
4. Remove the pressure gauge from gauge port MP.
Leveling Jack Relief Adjustment
1. Refer to Figure 2-19., Main Valve Block.
2. 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.
3. When all jacks are retracted the gauge should read
172 bar (2500 psi).
4. Adjust the relief valve located on the leveling jack
directional valve (refer to Figure 2-20.) clockwise to
increase, counter-clockwise to decrease. (The relief
valve is on the same face as the solenoid valves).
5. Remove the pressure gauge from gauge port MP.