Caution
(d) After engine starts, turn HEATSTART switch to
If work requires repeated short
HEAT until engine runs smoothly; insure that there is
swings, make one complete (360
)
enough oil pressure to turn off low oil pressure warning
swing to right every hour, to prevent
light (fig. 2-22). If light does not go out within 15
excessive wear on rollers of
seconds, stop engine (para 2-11) and determine
turntable roller circle.
cause(s).
Report deficiencies to organizational
(1) Raise load from its resting place by
maintenance personnel.
pulling hoist clutch and propel brake lever (fig 2-23)
Caution
toward operator, and at same time release hoist brake
Do not turn HEAT-START switch to
pedal. When load is at proper height, return hoist lever
HEAT while the engine is warm and
to neutral and apply hoist brake pedal to hold load in
running.
position.
c. Cold Weather Starting.
Starting the diesel
(2) Remove swing lock lever wedge (fig. 2-
engine at ambient temperatures of + 40 or lower
F
24), pull swing lock lever back to disengaged position,
requires use of an ether starting aid. For operating
then install wedge behind lever to prevent accidental
instructions on use of cold weather starting aids, refer to
movement of swing lock lever.
2-11. Stopping the Engine
(3) Move swing and propel shifter lever (fig.
a. Preparation for Stopping.
on quadrant to engage swing gear.
(1) Lower load until it rests on ground.
(4) Release swing brake by turning swing
(2) Apply swing and propel brakes and lock
brake hydraulic control handle (fig. 2-23) one quarter
with hydraulic control levers (para 2-8).
turn counterclockwise, then pulling handle up.
(3) Disengage engine clutch lever (fig. 2-24)
(5) To swing right, pull swing and propel
(4) Move engine throttle control lever to
clutch lever (fig. 2-23) toward operator. To swing left,
closed position (fig. 2-24) and allow engine to idle for 5
push lever away from operator.
to 10 minutes.
Note
b. Stopping the Engine.
When using a long boom, or when
(1) Pull the manual engine shutoff control
load is suspended from a long cable,
operate engine at lowest practical
stopped, push shutoff control in
throttle setting to prevent load from
(2) Move RUN-SHUTDOWN switch (fig. 2-
swinging wide of boom point when
22) to SHUTDOWN.
stopping.
(3) Turn all light switches OFF (fig. 2-24).
(6) To stop swinging, in either direction,
return swing and propel clutch lever to neutral. To stop
(4) Perform preventive maintenance checks
load from passing desired point, apply swing and propel
and services (para 3-6).
clutch lever in the opposite direction.
Warning
Note
Be sure that dipper; bucket;
If accurate stopping of load is
clamshell; hammer, or crane load is
necessary, or if revolving frame has a
lowered to ground when halting
tendency to drift, apply swing brake
operations, or leaving the crane
lever (fig. 2-23) and lock with swing
shovel.
After brake drums cool,
brake hydraulic control handle. This
brakes may slip and allow load to
will hold revolving frame in a fixed
fall. Injury or death, and damage to
position while the load is lowered.
equipment, could occur should this
warning be ignored.
(7) Lower load by releasing hoist brake pedal.
2-12. Operation of Equipment
The rate of load descent can be regulated by varying
pressure applied to hoist brake pedal. When load is at
a. General. This paragraph will describe all modes
rest, release pressure on hoist brake pedal.
of operation, assuming that operator has inspected and
serviced the machinery; the craneshovel is at an
(8) Repeat steps (1) through (7) as
operational site; the engine has been started (para 2-
necessary.
10); clutch has been engaged; unit has reached proper
c. Boom Raising or Lowering. With boom in a
operating temperature, and the crane-shovel is ready to
horizontal position, assure that boom hoist cable is
begin the assigned task(s).
properly reeved, then proceed to raise as follows:
b. Swinging.
(1) To raise boom pull back on boom hoist
clutch lever (fig. 2-23) to engage boom hoist clutch.
(Squeeze the boom hoist hydraulic control handle
against boom hoist clutch lever, and pump
2-29
