DeWalt DP3900 - Manual (Page 13)

13
English
WARNING: To reduce the possibility of contamination always pro-
tect against backflow when connected to a potable water system.
6. Connect high-pressure hose (C) to pump
X
C outlet.
7. If applying a chemical or cleaning solution,
refer to Chemicals and Cleaning
Solvents.
8. Turn the water source on.
CAUTION: Risk of property damage. Failure
to do so could cause damage to the pump.
9. Remove all air from the pump and high pressure hose by depress-
ing trigger until a steady stream of water is present.
10. Start engine. Refer to the engine instruction manual for correct
procedure.
WARNING: Risk of unsafe operation. If engine does not start
after two pulls, squeeze trigger of gun to relieve pump pressure. Pull
starter cord slowly until resistance is felt. Then pull cord rapidly to
avoid kickback and prevent hand or arm injury.
11. Depress trigger on gun to start water flow.
WARNING: Risk of unsafe operation. Stand on a stable
surface and grip gun/wand firmly with both hands. Expect the gun to
kickback when triggered.
12. Release trigger to stop water flow.
DANGER: Risk of injury from spray. Engage the
Y
trigger lock (Y) when gun is not in use to prevent
accidental spraying.
13. Adjust spray for the task being performed
by changing quick connect nozzle. Refer to
Spray Wand Nozzles.
Shutting Down
1. If chemicals were applied, place the chemical hose into a
container of clean water and draw clean water through chemical
injection system to rinse system thoroughly.
CAUTION: Risk of property damage Failure to do so could cause
damage to the pump.
2. Turn engine off. Refer to the engine instruction manual.
CAUTION: Risk of property damage. NEVER turn water supply off
while pressure washer engine is running or damage to pump will
result.
3. Turn water source off.
4. Pull trigger on spray gun to relieve any water pressure in hose or
spray gun.
5. Refer to Storage for proper storage procedures.
MAINTENANCE
WARNING: Risk of burning. When performing maintenance, you
may be exposed to hot surfaces, water pressure or moving parts that
can cause serious injury or death.
WARNING: Risk of fire. Always disconnect, spark plug wire, let the
engine cool and release all water pressure before performing any
maintenance or repair. The engine contains flammable fuel. Do not
smoke or work near open flames while performing maintenance.
To ensure efficient operation and longer life of your pressure washer,
a routine maintenance schedule should be prepared and followed.
If the pressure washer is used in unusual conditions, such as high
temperatures or dusty conditions, more fre
quent maintenance
checks will be required.