Upright TM12 Service & Parts Manual page 43

Maintenance
TM12 Work Platform - European
C V
OUNTERBALANCE
1. Operate the work platform for 10-15 minutes to bring the hydraulic oil up to normal operating
temperature.
2. Remove lower gauge port cap and install the pressure gauge assembly.
3. Remove the red Control Cable wire from terminal #9.
4. Lift work platform and block front wheels off ground.
5. Loosen the locknuts on Counterbalance Valves.
6. With the Chassis Key Switch on DECK and the Drive/Lift Switch in DRIVE, depress the Foot
Switch and slowly pull the Control Lever to REVERSE to drive the wheels.
7. Adjust the Forward Counterbalance Valve by turning the adjustment screw until the pres-
sure gauge indicates 83 bar (1200 psi).
8. Slowly push the Control Lever to FORWARD to drive the wheels.
9. Adjust the Reverse Counterbalance Valve by turning the adjustment screw until the pres-
sure gauge indicates 83 bar (1200 psi).
10. Check the settings by slowly moving the Control Lever FORWARD, then REVERSE, check-
ing the gauge to ensure pressures are properly set. Re-adjust as needed.
11. Tighten locknuts on valves to 8 Nm (6 Ft/Lbs). Remove blocks and lower work platform to
ground.
12. Reconnect the red Control Cable wire to terminal #9.
13. Remove the gauge from the gauge port and re-install cap.
14. Check for proper operation of the drive system and brake.
S R V
TEERING ELIEF
1. Operate the work platform for 10-15 minutes to bring the hydraulic oil up to normal operating
temperature.
2. Install gauge in lower gauge port.
3. Loosen locknut or remove cover on the Steering Relief Valve and turn adjusting screw
counter-clockwise two full turns.
4. While one person holds the Steering Switch to steer right or left, slowly turn the Steering
Relief Valve adjusting screw clockwise to increase the pressure until the gauge reads 69
bar (1000 psi).
5. Tighten locknut or replace Steering Relief Valve cover and torque to 8 Nm (6 Ft/Lbs).
6. Remove gauge and replace cap.
ALVES
ALVES
3.10 - Hydraulics
Page 3-17