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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 q uent maintenance checks
will be required.
Engine
Consult the engine instruction manual for the man u fac tur er's
recommendations for any and all maintenance.
note: The pressure washer frame is equipped with an oil drain hole
to help make changing the engine oil easier.
Pump (Fig. 19)
note: The Pump was filled with oil at the factory. The preferred oil is
SIMPSON
Premium Pump Crankcase Oil. If this oil is not available,
®
an SAE 15W-40 oil may be used. Change the pump oil after the
first 50 hours of operation and every 100 hours thereafter, or every
3 months.
to check oIL
The oil level should come to the dot in the middle of the sight glass
(AA).
hoW to chanGe PuMP oIL
1. Loosen pump oil fill plug (BB).
2. Place a container under the pump oil drain plug (CC).
3. Remove pump oil drain plug.
4. After oil is drained, replace pump oil drain plug. Tighten securely.
5. Refill pump using SIMPSON
oil is not available, an SAE 15W-40 oil may be used.
6. Replace pump oil fill plug and tighten securely.
Premium Pump Crankcase Oil. If this
®
FIG. 19
Nozzle Cleaning (Fig. 20–21)
If the nozzle becomes clogged with foreign materials, such as dirt,
excessive pressure may develop. If the nozzle becomes partially
clogged or restricted, the pump pressure will pulsate. Clean the
nozzle immediately using the nozzle kit supplied and the following
instructions:
1. Shut off the pressure washer and turn off the water supply.
2. Pull trigger on gun handle to relieve any water pressure.
3. Disconnect the spray wand from the gun.
4. Remove the high pressure nozzle from the spray wand. Remove
any obstructions with the nozzle cleaning tool (Y) provided and
back flush with clean water.
FIG. 20
Y
16
BB
AA
CC
FIG. 21
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Questions and answers
how to replace carburator
To replace the carburetor on a DeWalt DXPW3425 pressure washer:
1. Turn Off and Disconnect – Ensure the engine is off and cool. Disconnect the spark plug wire for safety.
2. Remove the Air Filter – Unscrew the air filter cover and take out the air filter and housing.
3. Disconnect Fuel Line – Turn off the fuel valve and carefully disconnect the fuel line from the carburetor.
4. Remove the Old Carburetor – Unscrew the mounting bolts and disconnect the throttle linkage.
5. Install the New Carburetor – Attach the throttle linkage, secure the carburetor with mounting bolts, and reconnect the fuel line.
6. Reinstall the Air Filter – Place the air filter housing and filter back in position and secure it with screws.
7. Reconnect and Test – Reconnect the spark plug wire, turn on the fuel valve, and start the engine to check for proper operation.
Ensure the replacement carburetor matches part numbers 16100-ZH8-W61 or 16100-ZH7-W51 for compatibility.
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