Gradall 544D (9136-4003) Service Manual - Manual (Page 63)

ELECTRO-MAGNETIC DETENT, 1- or 2-POSITION,
“E” Option (Refer to 4-17).
This option incorporates an electro-magnet in the bon-
net assembly. The magnet may be energized continu-
ously with a 12 VDC power supply. When the operator
manually shifts the spool to the detent position(s), the
spool will be held in position by magnetic force. A return
spring will center the spool to neutral when the mag-
net is de-energized, or the spool may be returned to
neutral manually. HANDLE ASSEMBLIES (Refer to Figures 4-21). Pro-
vides a choice of either horizontal or vertical handle
assemblies.
INLET and OUTLET COVERS (Refer to Section III,
Parts Ordering Information).
RELIEF VALVES and WORK PORT CHECKS (Refer
to Section III, Parts Ordering Information).
2-1