DeWalt D55250 Guide D'utilisation page 7

AIR INTAKE FILTER
This filter (B) is designed to clean air enter-
ing the pump. To ensure that the pump con-
tinually receives a clean, cool, and dry air
supply, the filter must always be clean and
the filter intake must be free from obstruc-
tions.
TANK PRESSURE GAGE
The tank pressure gauge indicates air pressure in the air tank.
REGULATED PRESSURE GAGE
The regulated pressure gage indicates the air pressure available at the
outlet side of the regulator. This pressure is controlled by the regulator
and is always less than or equal to the air tank pressure.
PRESSURE REGULATOR
The regulator knob controls the air pressure coming from the air tank.
Common Procedures
PILOT VALVE CUT-OUT PRESSURE ADJUSTMENT
NOTE: The compressor can run during this adjustment.
WARNING : Aftercooler, pump head, and surrounding parts are
very hot. Do not touch (see Hot Surfaces on page 2).
WARNING - Moving Parts: Keep your hair, clothing and gloves
away from moving parts. Loose clothing, jewelry, or long hair can be
caught in moving parts. Air vents may cover moving parts and should
be avoided as well. Do not remove the protective covers from this
product.
WARNING : The pilot valve is brass which is a soft metal. Do not
overtighten screw as threads can strip out.
1. Hold (E) firmly and loosen nut (D).
WARNING : Do not loosen screw (C) more than 1 revolution as
screw is subjected to tank pressure and can burst out which can harm
the user or surrounding personnel.
2. Turn screw (C) clockwise to
B
increase cut-out pressure limit or
counter clockwise to decrease
cut-out pressure. For example: if
the cut-out pressure limit on the
tank gage reads 120 PSI. and
desired cut out is 130 PSI, turn screw (C) clockwise.
3. Drain air from tanks through the drain valves until the pump begins
to charge tanks.
4. Close the drain valves.
5. Monitor tank pressure gage to ensure the new cut-out pressure
limit setting.
6. Once setting is complete hold screw (C) firmly and tighten nut (D).
PILOT VALVE PRESSURE DIFFERENTIAL ADJUSTMENT
NOTE: The compressor can run during this adjustment.
WARNING : Aftercooler, pump head, and surrounding parts are
very hot. Do not touch (see Hot Surfaces on page 2).
WARNING - Moving Parts: Keep your hair, clothing and gloves
away from moving parts. Loose clothing, jewelry, or long hair can be
caught in moving parts. Air vents may cover moving parts and should
be avoided as well. Do not remove the protective covers from this
product.
1. Hold (E) firmly and loosen nut (F).
WARNING : Do not loosen barrel (E) more than 1 revolution
because the barrel is subjected to tank pressure and can burst out
harming the user or surrounding persons.
2. Turn the barrel (E) clockwise to increase differential or counter
clockwise to decrease the differential. For example, if the pressure
differential is 100 - 130 PSI and 100 - 120 PSI is desired, turn (E)
counter clockwise.
NOTE : Too narrow a differential can cause chatter of the pilot valve.
Increase the differential to eliminate chatter.
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