JLG 110HX ANSI Service Manual - Manual (Page 65)

SECTION 2 - PROCEDURES
3120636 – JLG Lift – 2-41
7. Main Relief.
a. Disconnect and cap hoses to drive motor; plug
ports on drive section of proportional valve.
Monitor pressure gauge.
b. On accessory valve, loosen nut on main relief
cartridge and back out adjustment two (2) turns
(CCW).
c. Have an assistant activate drive function.
d. Slowly turn adjustment in (CW) and watch pres-
sure gauge. Continue turning until gauge stops
moving (approximately 3500 psi [241 bar]).
e. Turn adjustment in an additional 1/2 turn. This
will result in a relief setting approximately 200 psi
(14 bar) higher than the drive relief setting.
Solenoid Valve
NOTE: Make all solenoid valve adjustments with engine at
low rpm and pressure gauge attached to quick-con-
nect on solenoid valve.
1. Main Relief.
a. Activate platform level up function, bottom out
function and monitor pressure gauge.
b. Remove plug from main relief section and turn
adjusting screw to adjust main relief pressure to
2500 psi (172 bar). Turn adjusting screw CW to
increase pressure, CCW to decrease pressure.
Replace plug.
c. Release platform level up function.
2. Steer Relief.
a. Activate steer right function, bottom out function
and monitor pressure gauge.
b. Loosen locknut on steer right cartridge and turn
adjusting screw to adjust steer right relief pres-
sure to 2000 psi (138 bar). Turn adjusting screw
CW to increase pressure, CCW to decrease
pressure. Tighten locknut.
c. Release steer right function, activate steer left
function, bottom out function and monitor pres-
sure gauge.
d. Loosen locknut on steer left cartridge and turn
adjusting screw to adjust steer left relief pres-
sure to 2000 psi (138 bar). Turn adjusting screw
CW to increase pressure, CCW to decrease
pressure. Tighten locknut.
e. Release steer left function.
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3. Platform Rotate Relief.
a. Activate platform rotate right function, bottom
out function and monitor pressure gauge.
b. Loosen locknut on platform rotate right cartridge
and turn adjusting screw to adjust platform
rotate right relief pressure to 2500 psi (172 bar).
Tighten locknut.
c. Release platform rotate right function, activate
platform rotate left function, bottom out function
and monitor pressure gauge.
d. Loosen locknut on platform rotate left cartridge
and turn adjusting screw to adjust platform
rotate left relief pressure to 2500 psi (172 bar).
Tighten locknut.
e. Release platform rotate left function.
Extend-A-Reach Valve (If Equipped)
NOTE: Make extend-a-reach valve adjustment with engine
at low rpm and pressure gauge attached to quick-
connect on solenoid valve.
a. Activate extend-a-reach up function, bottom out
function and monitor pressure gauge.
b. Loosen locknut on extend-a-reach up cartridge
and turn adjusting screw to adjust extend-a-
reach up relief pressure to 2500 psi (172 bar).
Tighten locknut.
c. Release extend-a-reach up function, activate
extend-a-reach down function, bottom out func-
tion and monitor pressure gauge.
d. Loosen locknut on extend-a-reach down car-
tridge and turn adjusting screw to adjust extend-
a-reach down relief pressure to 700 psi (48 bar).
Tighten locknut.
e. Release extend-a-reach down function and
remove pressure gauge from solenoid valve.