JLG 1500SJ Service Manual - Manual (Page 423)

SECTION 5 - HYDRAULICS
3121262 – JLG Lift – 5-71
3. To make an adjustment to this pressure, go to the
engine compartment, locate the function pump. The
stand by adjustment is the adjustment outside
adjustment, closest to the turntable. Use the same
tools that were used in the High pressure adjust-
ment procedure.
Adjustments made at the Main Valve Bank
LIFT UP
1. Install a high pressure gauge at the M5 port of the
main valve block. Plug and cap the hose on port 5.
2. Activate lift up. The gauge should read 2750 psi
(189.6 Bar).
3. The adjustment cartridge is located below the M5
gauge port. Turn clockwise to increase, counter-
clockwise to decrease pressure.
LIFT DOWN
1. Install a high pressure gauge at the M4 port of the
main valve block.
2. Activate lift down to the end of the stroke. The gauge
should read 2000 psi (137.9 Bar).
3. The adjustment cartridge is located to the left of the
M4 gauge port. Turn clockwise to increase, counter-
clockwise to decrease pressure.
SWING
NOTE: Left and right are done with one adjustment.
1. Install a high pressure gauge at port MS.
2. Lock the turntable pin.
3. Activate swing, the gauge should read 1500 psi
(103.4 Bar). The adjustment cartridge is located
below the MS gauge port.
4. Turn clockwise to increase, counterclockwise to
decrease pressure.
TELESCOPE OUT
1. Install a high pressure gauge at the M8 port of the
main valve bank. Plug the telescope out hose either
at the valve bank (port #8) or at the inlet of the tele-
scope cylinder (V1).
2. Activate telescope out. The gauge should read 3200
psi (220.6 Bar).
3. The adjustment cartridge is located below the M8
gauge port. Turn clockwise to increase, counter-
clockwise to decrease pressure.
TELESCOPE IN
1. Install a high pressure gauge at the M7 port of the
main valve block. Plug the telescope in hose either
at the valve bank (port #7) or at the inlet of the tele-
scope cylinder (V2).
2. Activate Telescope In. The gauge should read 1800
psi (124 Bar).
3. The adjustment cartridge is located to the left of the
M7 gauge port. Turn clockwise to increase, counter-
clockwise to decrease pressure.
Adjustments Made at the Frame Valve Bank
AXLE EXTEND AND RETRACT, FRONT AND REAR
1. To extend the axles, drive the machine back and
forth until fully extended. A machine that cannot be
driven must be jacked up.
2. On both the front and rear frame valve banks, install
a high pressure gauge on ports MA1 for extend and
MA2 for retract. The gauge should read 2500 psi
(172.3 Bar) in both directions.
3. The axle extend/retract cylinders are connected
hydraulically in parallel. In order to get the correct
pressure of the circuit being adjusted, unscrew the
solenoid coil from the circuit not being adjusted and
pull it away from the valve.
4. Turn clockwise to increase, counterclockwise to
decrease pressure.
REXROTH PUMP
SAUER PUMP