Do not allow pressure to go over
500 psi (3448 kPa). Failure to fol-
low instructions may result in
damage to equipment.
Loosen nut (7).
Watching oil pressure tester, push BOOM
cylinder control handle (8) slowly to
LOWER. If necessary, turn screw (9)
counterclockwise to decrease pressure.
Needle valve (10) can be adjusted by
hand to provide a steady oil pressure
Adjust pressure for pressure relief valve
(11) to between 180 and 220 psi (1241
and 1517kPa) by turning screw (9)
counterclockwise to decrease pressure or
clockwise to increase pressure.
When correct pressure adjustment is ob-
tained, tighten nut (7).
If correct pressure adjustment cannot be
obtained, replace pressure relief valve.
Refer to page 2-163.
Slowly lower boom to stow position.
Turn off hydraulic
system. Refer to TM