SECTION 6: MAINTENANCE
AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
PAGE - 92
090012-OP_r0
section, consult the Engine Operator’s Manual for oil
change scheduling, and the procedure on how to change
the engine oil.
6.6.13 ADJUSTING THE ENGINE SPEED
Consult the Vanair
®
Service Department for issues
relating to adjustment of engine speed.
6.6.14 ADJUSTING THE PRESSURE SETTING
The
Cut-in pressure
is defined as the pressure in which
the compressor starts pumping. Anytime the pressure in
the tank falls below this pressure the compressor is
allowed to start pumping.
The
Cut-out pressure
is defined as the pressure in
which the compressor stops pumping. When the
pressure in the air tank rises above this pressure the
compressor is signaled to stop pumping.
Pressure settings for both the minimum and maximum
rated capacity levels for this machine are adjusted at the
factory before shipping, and should not need to be
adjusted. However, a situation may occur where it is
necessary to manually adjust or reset either or both of
these settings. For such cases, consult
Figure 6-17
, and
the following procedure:
1. Locate the air pressure control switch [
B
] at
the rear-side of the generator support
bracket [
A
]. Remove the cover-retaining
screw fastening the cover to the switch, and
remove the cover.
2. To adjust the compressor pressure, turn the
cut-in pressure adjustment screw [
C
]
clockwise to increase the pressure and
counterclockwise to lessen the pressure.
NOTE
Do not tamper with the governor setting
to increase the maximum engine speed.
Overspeed is hazardous and will void the
engine warranty.
TOOLS NEEDED
REPLACEMENT
PART(S)
Screwdriver
Not Applicable
WARNING
The compressor cut-in/cut-out pressures
have been factory-adjusted within the
limits of the compressor manufacturer.
The maximum pressure limit of the
compressor is 175 psi. Pressure should
never be allowed to go beyond this limit
or what has been set by local laws and
regulators. This system will disengage
the clutch at 185 psi. A 200 psi safety
relief valve is located on the air tank to
prevent over pressurizing the system.
NOTE
There must be a minim
um of
25 psi
difference between the cut-in and cut-out
pressures for the system to operate
properly.
NOTE
Refer to the Engine Operator’s Manual
for engine service and maintenance
recommendations that are not provided
in this manual.
WARNING
Pressure settings (both minimum and
maximum) are pre-secured within the
rated capacity levels for this machine at
the factory before shipping. However, it
may be necessary to manually adjust.
NEVER adjust the pressures beyond the
recommended or rated capacity
specified for the machine.
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