VMAC
– Vehicle Mounted Air Compressors
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29
Stopping the engine
The engine may experience a backfire if it is shut off while the
engine speed is above idle and the compressor is building air
pressure. This is normal and is caused by the load on the
engine during shut down. Ensure the engine is at idle prior to
shutting it off.
The exhaust system is equipped with a spark arrester.
To properly shut down the engine:
1) Stop air use and close the air discharge valve.
2) Ensure the system has built to full system pressure (factory setting 150
psi) and the compressor
is “unloaded”.
3) Allow the engine to run at low idle for at least 10 seconds.
4) Turn the key to the “OFF” position.
5) Move the fuel shut off valve all the way to the left to shut off the fuel
(Figure 22)
Figure 22
– Shut off fuel
Improper shut down may cause compressor oil to discharge
from the compressor air filter.
Ensure the fuel shut off valve is closed (all the way to the left)
when the unit is not being run or before moving to a different
site. Failure to do this may allow fuel to overfill the carburetor
float bowl and flow into the engine’s cylinder and/or crank case
causing the engine to hydraulically lock.
Off
Fuel lever
Summary of Contents for G300003
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