JLG 1850SJ, Service And Maintenance Manual, Page: 373 / 712

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
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STEERING, FRONT AND REAR
1. The axles must be extended to set the steer pressures.
2. Install a high pressure gauge at “MS2” and “MS4” gauge
ports for steer right (extend), adjust to 2000 psi, and
“MS1 and “MS3” for steer left (retract), adjust to 2600 psi,
on both the front and rear valves. Each relief valve is
located next to its own gauge port. Turn clockwise to
increase, counterclockwise to decrease.
4. Adjustments Made at the Platform Valve Bank
PLATFORM LEVEL UP
1. Install a high pressure gauge at gauge port “ML1”.
2. Activate level up to the end of stroke, the gauge should
read 2500 psi.(172bar).
3. All the relief valves are located on the same face. The
level up relief valve is on the top. Turn clockwise to
increase, counterclockwise to decrease.
PLATFORM LEVEL DOWN
1. Install a high pressure gauge at gauge port “ML2”.