DeWalt D55143 Instruction Manual page 7

AIR TANK DRAIN VALVES (FIG. 3)
The drain valves (H) are used to remove compressed air, moisture
and debris from the air tank after the air compressor is shut off.
MOTOR THERMAL OVERLOAD
The electric motor has a manual motor reset switch (G). If the motor
overheats for any reason, the motor reset switch will cut off power,
thus preventing the motor from being damaged. Turn the pressure
switch lever to the OFF position and wait until the motor cools before
pressing the motor reset switch.
FIG. 7
N
AIR INTAKE FILTER
CAUTION: Do not operate without the air intake filter.
This filter (N) is designed to clean air entering the pump. To ensure
the pump continually receives a clean, cool and dry air supply this
filter must always be clean and the filter intake must be free from
obstructions.
TANK PRESSURE GAUGE (FIG. 1)
The tank pressure gauge (A) indicates air pressure in the air tank.
N
G
5
REGULATED PRESSURE GAUGE (FIG. 1)
The regulated pressure gauge (D) indicates the air pressure avail-
able 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 KNOB (FIG. 1)
The pressure regulator knob (E) controls the air pressure coming
from the air tank.
Common Procedures
CHECKING SAFETY RELIEF VALVE OPERATION
WARNING: Aftercooler, pump head and surrounding parts are
very hot. Do not touch (see Hot Surfaces, Fig. 5).
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Ensure that the tanks are empty by looking at the tank pressure
gauge. Drain the tanks if necessary.
3. Grasp the wire ring on the safety relief valve (I) as shown in
Figure 6.
4. Pull and release the ring a few times to ensure that the plunger
moves in and out. Replace the safety relief valve if plunger
does not move or is difficult to move.
CHECKING AIR FILTER ELEMENT
WARNING: Aftercooler, pump head and surrounding parts are
very hot. Do not touch (see Hot Surfaces, Fig. 5) .
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Allow the unit to cool.
3. Depress detent pins on filter cover to remove.
4. Remove air filter element.
5. To clean the filter element, blow out with air. Replace air filter
element if unsure.