JLG 1250AJP Service Manual - Manual (Page 402)

SECTION 5 - HYDRAULICS
5-48 – JLG Lift – 3121171
HIGH PRESSURE RELIEF - 3200 PSI (220.6 BAR)
1. Install a high pressure gauge at the MP1 port of the
main valve block.
2. Using a screwdriver, remove the Din connector from
the telescope proportional flow coil.
3. Activate telescope in. The gauge should read 3200
psi (220.6 bar).
4. To make an adjustment to this pressure, go back to
the engine compartment to the function pump which
is the back pump. The high pressure relief adjust-
ment is the adjustment closest to the pump. Using a
17 mm wrench, remove the cover nut. Be careful not
to lose the O-ring washer inside the cover nut.
5. Loosen the jam nut at the setscrew with the 17 mm
wrench. Using a 3 mm allen wrench, adjust clock-
wise to increase, or counterclockwise to decrease.
6. After adjusting the pressure, tighten the jam nut and
the cover nut. This is the maximum relief pressure
for all the functions governed by this pump.
Adjustments made at the Main Valve Bank
SWING 1500 PSI (103.4 BAR)
1. Install turntable lock pin.
2. Install high pressure gauge at port "M13".
3. Activate swing right.
4. Swing right relief valve is located on top surface of
valve directly behind "M13". The adjustment is below
the outer plug. Turn CW to increase pressure.
REXROTH PUMP
SAUER PUMP