Filter
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release pressure from compressor
tank. Use your other hand to deflect
fast-moving air from being directed
toward your face.
3. The safety valve should automatically
close at approximately 40-50 psi. If the
safety valve does not allow air to be
released when you pull on the ring,
or if it does not close automatically, it
MUST be replaced.
Safety valve must
be replaced if it
cannot be actuated or it leaks air after
ring is released.
PRESSURE GAUGES
Gauge attached to regulator indicates
air pressure going to hose (and any tool
attached to end of hose).
Gauge attached to pressure switch
indicates air pressure in tank.
Maintenance
Release all pressure
and disconnect
power before making any repair.
1. Check compressor for any visible
problems, especially check air filter to
be sure it is clean.
2. Pull ring on safety valve and allow it to
snap back to normal position (Figure 4).
Safety valve must
be replaced if it
cannot be actuated or it leaks air after ring
is released.
3. Daily with compressor shut off:
Depressurize system prior to draining
tank. Drain moisture from tanks by
opening drain cocks underneath end
of tanks.
4. Turn power OFF and clean dust and dirt
from motor, tank, air lines and pump
cooling fins.
NOTE: The air filter in the filter housing on
the side of the head must be checked and
cleaned periodically, more often if used
under very dusty conditions or when a
great deal of fog from spraying is allowed
to circulate near unit.
IMPORTANT:
Unit should be located as far
from spraying area as hose will allow to
prevent over-spray from clogging filter.
FILTER REMOVAL, INSPECTION AND
REPLACEMENT
To change a filter, pull off the filter
housing cover. If filter element is dirty,
rotate filter cover so the holes line up with
clean element material and snap cover
onto housing. If filter element has no clean
areas, replace element or entire filter.
LUBRICATION
This is an oilless type compressor requiring
no lubrication.
THERMAL OVERLOAD PROTECTOR
Turn off the pressure switch or unplug
compressor for 20 minutes and allow it to
cool. Unit should automatically reset.
This compressor is
equipped with
an automatic reset thermal overload
protector which will shut off motor if it
becomes overheated.
If thermal overload protector shuts
motor off frequently look for the
following causes.
1. Low voltage.
2. Wrong gauge wire or length of
extension cord.
3. Clogged air filter.
4. Lack of proper ventilation.
The motor must be
allowed to cool
down before start-up is possible. The
motor will automatically restart without
warning if left plugged into electrical
outlet, if the motor is turned on.
STORAGE
1. When not in use, hose and compressor
should be stored in a cool dry place.
2. Tank should be drained of moisture.
3. Hose should be disconnected and hung
open ends down to allow any moisture
to drain.
Notes
5
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HM7500
Operation (Cont.)
Figure 5
Drain
Cock