smoothly, and insure that there is enough oil pressure to
turn off low oil pressure warning light. If warning light
does not go out within 15 seconds, step engine (para 2-
11) and determine causes(s). Report deficiencies to
organizational maintenance.
Caution
Do not turn HEAT-START switch to
HEAT when engine is warm and
running.
(3) Operating glow plugs and pressure primer
discharger simultaneously.
(a) Refer to table 2-1, compare ambient
temperature with time required, then move HEAT-
START switch to HEAT.
(b) After glow plugs have heated the allocated time,
press operating handle of pressure discharger; release
propane into intake manifold, and at same time move
HEAT-START switch to START.
(c) After engine starts, move HEATSTART switch
to HEAT until engine is running smoothly, then move
switch to OFF.
Note
Starting
crane-shovel
units
at
Figure 2-29. Pressure primer discharger.
ambient temperature of +20'F or
lower may require preheating of
crankcase oil and coolant
simultaneously with operating lever of pressure primer
discharger and hold for 15 seconds, or until engine
2-26. Personnel Heater
starts.
a. General.
These crane-shovel units are
(e) If engine does not start in 15 seconds, let starter
equipped with a hot water type heater, mounted just
motor rest for at least 30 seconds then repeat steps (a)
behind operator on floor of cab.
through (d) above.
(f) When engine starts, decrease throttle control
b. Fan and Heater Controls. A fan control toggle
lever to a low idle until engine oil pressure reaches
switch is mounted on lighting control box in the cab (fig.
normal operating pressure, then run engine at half
2-24). Two control valves (fig. 2-26) controls flow of
throttle for at least five minutes before applying a load.
heated coolant from engine to heater.
Caution
Use only enough propane to start the
c. Operation.
engine, or to keep it running if it
(1) Before attempting to use heater, be sure
begins to stall.
that the two valves at engine are open (fig. 2-26).
(2) Operating the glow plugs (on engines
(2) Start heater fan by moving toggle switch
model DSSSTA).
(fig. 2-24) up to ON.
(3) In warm weather, heater fan may be used
HEAT-START switch (fig. 2-15) to HEAT.
to circulate air in the cab, by leaving water flow control
(b) After plugs have heated the required time,
valves (fig. 2-26) closed.
move HEAT-START switch to START and hold for 10
2-27. Trouble Light
seconds, or until engine starts. As soon as engine
a. Description. The trouble light is a drop cord
starts, move switch to HEAT position until engine is
type, 24 Vdc, and is stowed in the cab.
running smoothly, then move switch to' OFF.
b. Operation. Remove light from stowed position
(c) If engine does not start after 10 seconds of
and plug into trouble light socket on lighting panel (fig.
cranking, repeat steps (a) through (b) above.
2-24).
(d) If engine fails to start on second try, let starter motor
rest for three minutes, then repeat step (a) above.
(e) After engine has started, move HEAT-START
switch to HEAT position until engine is running
2-34
