Service Manual Instruction Manual

SECTION 5 - HYDRAULICS
3121171 – JLG Lift – 5-49
5. Install high pressure gauge at "M14".
6. Activate swing left.
7. Swing left relief is located to the left of "M14". The
adjustment is below the outer cap. Turn CW to increase
pressure.
8. Remove turntable lock pin.
MAIN TELESCOPE 2200 PSI (151.6 BAR)
1. Cap ports 1 and 2.
2. Install high pressure gauge at "M1".
3. Activate main telescope extend.
4. Main telescope extend relief is located on the top sur-
face of the valve directly behind "M1". The adjustment is
below the outer cap. Turn CW to increase pressure.
5. Install high pressure relief at "M2".
6. Activate main telescope retract.
7. Main telescope retract is on top surface of valve directly
behind "M2". The adjustment is below the outer plug.
Turn CW to increase pressure.
8. Reconnect hoses.
PVG VALVE (MAIN LIFT, TOWER LIFT, AND TOWER TELE)
Because of an internal shuttle network in the PVG valve, all
port pressures can be measured at the "LS" quick connect on
the top surface of the valve to the extreme left.
NOTE: Pressures are not adjustable and can only be monitored.
Should the setting be outside of the pressure tolerance the
respective shock valve must be replaced.
1. To check port pressure on PVG, install analyzer and go to
access level 1 as follows.
a. Plug the analyzer into the connector inside the
Ground control box.
b. Pull out the Emergency Stop switch and start the
engine.