Figure 12-29.Operating Instruction plate.
1. Open the service valves about one quarter-not
NOTE: The reason for starting with the service
valves partly open is that they aid in quicker warm-up
of the compressor oil.
2. Position the low-pressure, engine-oil-system
safety knob to ON (fig. 12-30).
3. Turn the ignition switch to the START position.
Immediately after the engine starts, release the ignition
switch. If the engine fails to fire within 30 seconds,
release the ignition switch and allow the starting motor
to cool off for a few moments before trying the starter
4. With the engine running, check the engine oil
pressure gauge. If no pressure is indicated, turn the
engine off. When the oil pressure goes above 22 psi,
continue to operate the engine and check the
low-pressure engine oil switch. The knob on this switch
should be in the RUN position.
NOTE: The engine oil pressure gauge indicates
erratically until the engine oil warms up.
5. Open the side curtains on both sides of the
engine enclosure and leave them open. The flow of air
through the oil cooler and engine radiator will be
impeded if the side curtains are closed while the engine
6. After the engine has run about 3 minutes, check
the engine coolant temperature gauge. The gauge
should indicate less than 210°F. If the gauge is showing
more than 210°F, SHUT OFF THE ENGINE.
Figure 12-30.Instrument panel.