JLG 120HX Service Manual - Manual (Page 49)

SECTION 2 - PROCEDURES
3120819 – JLG Lift – 2-27
b. Bottom out Extend-A-Reach Up function.
c. Loosen nut at extend-a-reach up relief and
adjust pressure to 207 bar (3000 psi) using an
Allen wrench. Tighten nut.
d. Bottom out Extend-A-Reach Down function.
e. Loosen nut at extend-a-reach down relief and
adjust pressure to 97 bar (1400 psi) using an
Allen wrench. Tighten nut.
5. Platform Rotate Relief.
a. Monitor pressure gauge at quick-connect on
main valve.
b. Bottom out Rotate Right function.
c. Loosen nut on rotate right relief and adjust pres-
sure to 172 bar (2500 psi). Tighten nut.
d. Bottom out Rotate Left function.
e. Loosen nut on rotate left relief and adjust pres-
sure to 172 bar (2500 psi). Tighten nut.
6. Platform Level Relief.
a. Monitor pressure gauge at quick-connect on
main valve.
b. Bottom out Platform Level Up function.
c. Loosen nut on platform level up relief and adjust
to . Tighten nut.
d. Bottom out Platform Level Down function 172
bar (2500 psi). Tighten nut.
e. Loosen nut on platform level down relief and
adjust to 138 bar (2000 psi).
Frame Valve
1. Steer Relief.
NOTE: Torque frame valve bolts to 9 Nm (80 in. lb.) after
checking or adjusting adjusting steer pressure.
a. Plug pressure gauge into quick-connection on
frame valve. Monitor gauge.
b. Bottom out Front Steer Right function.
c. Loosen nut on front steer right relief and adjust
to 138 bar (2000 psi). Tighten nut.
d. Bottom out Front Steer Left function.
e. Loosen nut on front steer left relief and adjust to
138 bar (2000 psi). Tighten nut.
f. Bottom out Rear Steer Right function.
g. Loosen nut on rear steer right relief and adjust to
138 bar (2000 psi). Tighten nut.
h. Bottom out Rear Steer Left function.
i. Loosen nut on rear steer left relief and adjust to
138 bar (2000 psi). Tighten nut.
2. Axle Extension/Retraction Relief.
a. Monitor pressure gauge at quick-connect on
frame valve.
b. Raise front end of machine using front frame
jack.
c. Bottom out Front Axle Extend function.
d. Loosen nut on front axle extend relief and adjust
pressure to 138 bar (2000 psi). Tighten nut.
e. Bottom out Front Axle Retract function.
f. Loosen nut on front axle retract relief and adjust
pressure to 152 bar (2200 psi). Tighten nut.
g. Lower front end of machine.
h. Raise rear end of machine using rear frame jack.
i. Bottom out Rear Axle Extend function.
j. Loosen nut on rear axle extend relief and adjust
pressure to 138 bar (2000 psi). Tighten nut.