14
Spray Nozzle Servicing
If the spray nozzle becomes clogged with dirt, excessive
pump pressures may develop. A nozzle that has become
partly clogged will demonstrate a ‘pulsing’ sensation during
use. If the nozzle becomes clogged or partially restricted, it
can be cleaned as follows:
1. Shut down the engine and turn off the water supply to
the pump.
2. Put on your safety glasses, as there could be trapped
pressure behind a totally-clogged nozzle.
3. Disconnect the wand from the spray gun.
4. As seen in Figure 3.3, use a 5/64 inch (2mm) Allen wrench
to remove the nozzle from the end of the wand.
5. Use a length of wire similar to that seen in Figure 3.3 to
free any dirt from the nozzle.
NOTE:
If desired, a 5/64 inch (2mm) wrench can be
ordered by specifying
Generac®
nozzle kit part
number 96961. A length of 17 gauge (0.039 inch)
wire may be used to clean the nozzle. If desired, a
nozzle cleaning rod may be ordered by specifying
Generac®
nozzle kit part number 96869.
6. Remove any additional dirt from the wand by back-
flushing with water, as described below and shown in
Figure 3.4.
a. Hold the water supply against the wand and back-flush
for about 30 seconds to 1 minute.
b. While flushing, move the nozzle collar between stream
and spray positions and between the low and high
pressure positions.
7. Use the 5/64 inch (2mm) Allen wrench to reinstall the
nozzle into the wand. DO NOT OVERTIGHTEN.
8. Reattach the wand to the spray gun.
9. Reconnect the inlet water supply to the pump and turn
on the water.
10. Start the engine and test operation.
Section 3 • General Information
Portable Pressure Washer Familiarization and Troubleshooting Guide
Figure 3.3 — Nozzle Removal and Cleaning
Figure 3.4 — Back-flushing the Wand
