JLG 1850SJ Service Manual - Manual (Page 238)

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
5-68 – JLG Lift – 3121619
4. The stand by adjustment is the outside adjustment.
Using the same procedure as in the (PC) setting above
adjust (LS) to 300psi (21bar).
2. Adjustments Made at the Main Valve Bank
REDUCED PRESSURE SECTION
1. Install pressure gauge at port MP4.
2. Remove deutsch connector from lift down coil.
3. Turn adjustment screws on the pressure reducing valve
located at 3 o’clock adjacent to port P4, and the relief
valve, located at 5 o’clock adjacent to port P4, fully clock-
wise. Energize Lift Down, the gauge should read approx-
imately 4000 psi (275bar), turn adjusting screw on relief
valve CCW to obtain gauge reading of 3550 psi. (241bar)
With lift down still energized, turn adjusting screw on
pressure reducing valve CCW to obtain a gauge reading
of 3200 psi. (221 bar).