JLG 150HAX Service Manual - Manual (Page 114)

SECTION 5 - HYDRAULICS
5-18 – JLG Lift – 3120817
to increase pressure, counterclockwise to decrease
pressure. Tighten locknut.
6. Bottom out Rear Axle Extend function.
7. Loosen locknut on applicable 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.
8. Bottom out Rear Axle Retract function.
9. 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
to increase pressure, counterclockwise to decrease
pressure. Tighten locknut.
10. The two valve sections controlling the front and rear
jack cylinders are controlled by system pressure
and are non-adjustable.