Figure 2-22. Instrument control stand.
2-8. Controls and Instruments
e. Swing Brake Hydraulic Control Handle.
This handle (fig. 2-23) locks swing brake. To apply
swing brake, push swing brake lever (fig. 2-24) forward,
a. General. The following instruments and controls
then push down on hydraulic control handle and turn it
are identified on illustrations indicated.
1/ turn clockwise to lock. To release swing brake, turn
b. Tachometer (Time Totalizing Meter).
hydraulic control handle 1/4 turn counterclockwise then
pull up.
(1) The tachometer-hour meter is located at
top of instrument panel (fig. 2-22) and indicates speed
f. Propel Brake Hydraulic Control Handle. This
(in revolutions per minute) at which engine is operating.
handle (fig. 2-23) locks propel brake. To apply, push
(2) The hour meter portion of tachometer is
hoist clutch and propel brake lever away from operator,
calibrated to register engine hours at 1,411 rpm.
then push down on hydraulic control handle and turn
Operation at other speeds subject to interpolation.
/4 turn clockwise to lock. To release propel brakes,
turn the handle counterclockwise one quarter turn and
pull up.
others illuminate lighting control box area.
g. Horn Push Switch. When depressed, horn push
d. Boom Hoist Pawl Control Handle. The boom
switch (fig. 2-22) completes electrical circuit and horn
hoist pawl control handle (fig. 2-23) enables operator to
sounds warning. When pressure is released, horn shuts
engage or disengage pawl from boom hoist drum
off.
ratchet. Push down to engage. To release pawl from
h. Run-Shutdoum Switch (Applicable to Engine
engagement with the ratchet, raise boom slightly by
Model 687C-18-ES Installation Only).
Moving this
pulling boom hoist lever toward operator, to take
switch (fig. 2-22) to RUN energizes
pressure off the pawl, then pull up on handle.
2-22
