IMT DA435HAR, User Manual, Page: 9 / 34

DA435HAR: 99900683: 3-1 19950918
SECTION 3. OPERATION
3-1. GENERAL
Each compressor is bench tested under load at the
factory to ensure proper break-in and operation.
While it is not necessary to follow any break-in
procedure, the following checks should be made
before putting the unit into service, as well as,
periodically during use.
1. Before start-up:
A. Check the oil level in the compressor
crankcase with the dipstick on the unit. If oil is
needed, use only IMT’s synthetic compressor oil.
B. Check the air intake filters on each
head to make certain that they are clean and
unobstructed. Dirty filters are a possible cause of
reduced air output.
2. With the compressor engaged:
Adjust engine speed to ensure that compressor
speed does not exceed 1400 RPM (max) under
load.
3-2. OPERATION
To use the compressor, start the vehicle engine and
engage the compressor by operating the compressor
switch.The system will now function automatically.
It will engage the compressor clutch when the air
pressure is below 120 psi, and disengage when the
air pressure reaches 150 psi.
NOTE
ON UNITS WITH MANUAL ENGINE SPEED CONTROL,
THE ENGINE RPM WILL INCREASE WHEN THE
COMPRESSOR CLUTCH DISENGAGES.
CAUTION
OPERATING THIS UNIT IN EXCESS OF 1400 RPM,
WILL VOID THE WARRANTY, AND WILL SHORTEN THE
NORMAL SERVICE LIFE OF THE COMPRESSOR.