2-37. MAINTENANCE OF PRESSURE RELIEF VALVE (CONT).
26 Adjust pressure for pressure relief valve
(15) to between 180 and 220 psi (1241
Do not allow pressure to go over
and 1517 kPa) by turning screw (14)
500 psi (3448 kPa). Failure to
counterclockwise to decrease pressure or
follow instructions may result in
clockwise to increase pressure.
damage to equipment.
27 When correct pressure adjustment is ob-
24 Loosen nut (12).
tained, tighten nut (12). -
25 Watching oil pressure tester, push BOOM
28 If correct pressure adjustment cannot be
WINCH control handle (13) slowly to
obtained, replace pressure relief valve
LOWER. If pressure is more than 500 psi
(15). Refer to page 2-163.
(3448 kPa) while operating boom winch,
turn screw (14) counterclockwise to