JLG 1250AJP Service Manual - Manual (Page 403)

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
surface of the valve directly behind "M1". The adjust-
ment 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 con-
nect on the top surface of the valve to the extreme left.
NOTE: Pressures are not adjustable and can only be moni-
tored. 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.