Hydraulics
Section 2 - Service and Repair
Page 2-24
114101-000 X26 Ultra Narrow - Service Manual
S
TEERING
R
ELIEF
V
ALVE
1. Operate the machine for 10-15 minutes to bring the hydraulic fluid up to normal operating temperature.
2. Remove the gauge port cap and install the pressure gauge assembly.
3. Loosen the locknut or remove the cover on the Steering Relief Valve and turn the adjusting screw coun-
terclockwise two full turns.
4. While one person holds the Steering Switch to steer to the right or left, slowly turn the Steering Relief
Valve adjusting screw clockwise to increase the pressure until the gauge reads 103 bar (
1500 psi
).
5. Tighten the locknut or replace the Steering Relief Valve cover and torque to 8 N-m (
6 ft./lbs.
).
6. Remove the gauge and replace the cap.
L
IFT
R
ELIEF
V
ALVE
1. Operate the hydraulic system 10-15 minutes to warm the fluid.
2. Loosen the locknut or remove the cover on the Lift Relief Valve and turn the adjusting screw counter-
clockwise two full turns.
3. Place the maximum rated load on the platform (see the Specifications Table in the
Operator Manual
).
4. Turn and hold the Chassis Key Switch to CHASSIS. Push the Chassis Lift Switch to the UP position and
hold it there.
5. Slowly turn the Lift Relief Valve adjusting screw clockwise to increase the pressure until the platform
just begins to rise.
6. Release the Chassis Lift Switch. Tighten locknut or replace the Lift Relief Valve cover and torque to
8 N-m. (
6 ft./lbs.
).
C
OUNTERBALANCE
V
ALVES
1. Operate the machine for 10-15 minutes to bring the hydraulic fluid up to normal operating temperature.
2. Remove the gauge port cap and install the pressure gauge assembly.
3. Lift the machine and support the chassis with jackstands so that the drive wheels are off the ground.
4. Loosen the locknuts on Counterbalance Valves.
5. With the Chassis Key Switch on DECK and the Drive/Lift Switch in DRIVE depress the Interlock Lever
and slowly pull the Control Handle to REVERSE to drive the wheels.
6. Adjust the Forward Counterbalance Valve by turning the adjustment screw until the pressure gauge
indicates 76 bar (
1100 psi
).
7. Slowly push the Control Handle to FORWARD to drive the wheels.
8. Adjust the Reverse Counterbalance Valve by turning the adjustment screw until the pressure gauge
indicates 76 bar (
1100 psi
).
9. Check the settings by slowly moving the Control Handle FORWARD, then REVERSE, checking the
gauge to ensure that the pressures are properly set. Readjust as needed.
10. Tighten the locknuts on the valves to 8 N-m (
6 ft./lbs.
). Remove the blocks and lower the machine to
the ground.