Break-In Procedure; Operating Procedures - DeWalt D55250 Instruction Manual

7. Ensure all covers and labels are in place, legible (for labels) and
securely mounted. Do not use compressor until all items have
been verified.
Initial Set-up (Fig. 1)
WARNING: Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
instructions.

breAk-In ProCeDure

WARNING: Risk of property damage. Serious damage may result
if the following break-in instructions are not closely followed.
this procedure is required:
• Before the air compressor is used for the first time.
• When the unloader valve has been replaced.
• When the compressor pump has been replaced.
the procedure:
1. Follow Pre-start Checklist under Preparation for Use.
. Rotate the unloader's manual lock to the open position to
prevent air tank pressure buildup.
3. Open the pressure regulator. Pull regulator knob (F) out and
rotate clockwise until it stops.
WARNING: Do not operate this unit until you read and understand
the engine instruction's manual for safety, operation and maintenance
instructions.
4. Prepare engine for first time use, see engine's instruction manual
for correct procedure.
5. Turn the engine ON/OFF switch (C) to the ON Position.
note: If hose is not connected to quick connect body, pull coupler
back until it clicks to prevent air from escaping through the quick
connect.
6. Start engine, see engine's instruction manual for correct
procedure.
7. Run the air compressor for 30 minutes to seat the rings and
lubricate all the internal surfaces. Ensure there is no pressure
build up in the air tank by observing the reading on the air tank
pressure gauge.
8. Rotate the manual lock on the unloader valve into the closed
position so the air tank pressure can build.
9. Close the pressure regulator. Rotate the regulator knob (F)
counterclockwise to its built-in stop and push knob in to lock in
place. This will allow air to build pressure in the air tank.
10. Compressed air will be available from the hose air outlet until it is
used up or bled off.

oPErATInG ProCEDurES

Start-up (Fig. 1)
1. Follow Pre-start Checklist under Preparation for Use.
. Pull out and turn regulator knob (F) counterclockwise until fully
closed. Push in to lock. Regulated pressure gauge should read 0
PSI (0 kPa).
3. Rotate the manual lock unloader lever to the open position to
assist with start up.
4. Turn the engine ON/OFF switch (C) to the ON Position.
5. Start engine, see engine's instruction manual for correct
procedure.
6. Rotate manual lock unloader lever to the closed position to allow
air tank pressure to build. note: Pump will not operate with the
manual lock unloader lever in the open position.
7. Allow compressor to pump up to blow off pressure.
note: If any unusual noise or vibration is noticed, stop the
compressor and refer to the troubleshooting section.
note: The air compressor pump is capable of running continuously.
To prolong the air compressor's life, it is recommended to run at high
throttle 50-75% of the run time and idle for 5% of the run time.
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