JLG 150HAX ANSI Service Manual - Manual (Page 112)

SECTION 5 - HYDRAULICS
5-16 – JLG Lift – 3120679
c. Bottom out Tower Lift Down function.
d. Adjust pressure to 3000 psi (207 bar).
6. Swing Relief.
a. Lock turntable.
b. Bottom out Swing Right function.
c. Adjust pressure to 1700 psi (117 bar).
d. Bottom out Swing Left function.
e. Adjust pressure to 1700 psi (117 bar).
f. Unlock turntable.
Two Stack Directional Control Valve
1. Attach pressure gauge to quick disconnect at two
stack directional control valve, located inside control
valve compartment on right side of machine, adja-
cent to engine compartment
2. Loosen locknut on adjusting screw on rotate right
valve section and turn adjusting screw clockwise to
increase pressure.
3. Bottom out Rotate Right function.
4. Remove cap plug on main relief and adjust main
relief to 2750 psi (190 bar). Turn adjusting screw
clockwise to increase pressure, counterclockwise to
decrease pressure. Replace cap plug.
5. After main relief has been set, bottom out Rotate
Right again and turn adjusting screw on rotate right
valve section to 2500 psi (172 bar). Turn adjusting
screw clockwise to increase pressure, counterclock-
wise to decrease pressure. Tighten locknut.
6. Bottom out Rotate Left function.
7. Loosen locknut and turn adjusting screw on oppo-
site side of valve section to 2500 psi (172 bar). Turn
adjusting screw clockwise to increase pressure,
counterclockwise to decrease pressure. Tighten
locknut.
8. Bottom out Level Up function.
9. Loosen locknut and adjust level up relief valve,
located adjacent to single spool proportional relief
valve, to 2500 psi (172 bar). Turn adjusting screw
clockwise to increase pressure, counterclockwise to
decrease pressure. Tighten locknut.
10. Bottom out Level Down function.
11. Loosen locknut and adjust level down relief valve,
located adjacent to single spool proportional relief
valve, to 2500 psi (172 bar). Turn adjusting screw
clockwise to increase pressure, counterclockwise to
decrease pressure. Tighten locknut.
Three Stack Directional Control Valve
1. Plug pressure gauge into quick-connect at three
stack directional control valve, located inside left
rear of machine frame.
2. Bottom out Front Steer Right function.
3. Loosen locknut on front steer valve section and turn
adjusting screw to adjust valve section to 2000 psi
(138 bar). Turn adjusting screw clockwise to
increase pressure, counterclockwise to decrease
pressure. Tighten locknut.
4. Bottom out Front Steer Left function.
5. Loosen lock nut on opposite side of valve section
and turn adjusting screw to adjust valve section to
2000 psi (138 bar). Turn adjusting screw clockwise