97-6642 • HOTSY 781SS, 871SS, 921SS • REV. 7/06
11
PRESSURE
W
ASHER
OPERA
TOR’S MANU
AL
to clean
DANGER: DO NOT place hands or fingers in front of
high pressure spray. Bodily injury may result.
The detergent injector valve operates by reducing the
volume of water, thus a vacuum is achieved and detergent
is drawn into the system.
DO nOt
reduce the water inlet
flow so the pump cavitates due to water starvation.
Operating a pump with insufficient water will damage
the pump seals.
1. Insert detergent inlet line into container of mixed
detergent.
2. Completely open detergent control knob located
on the side of the detergent injector valve. Refer to
figure 5
.
3. Start the detergent suction by rotating the water
adjustment knob of the detergent injector valve.
Refer to
figure 6
. Turning the knob counterclockwise
will pull detergent into the system. The flow may be
observed through the clear detergent line. Secure the
knob position with the knurled nut.
4. The side detergent control knob can now be adjusted
to meter the desired amount of detergent.
5. Wash from the bottom to the top, using side to side
motions. This washes away heavy dirt and allows the
detergent to soak as you work toward the top.
6. Do not wash at a 90
o
angle to the work (straight at
it). This will allow water to splash back at you and
reduces your cleaning power. Wash at a 30
°
to 60
°
angle to the work. This will allow the water to splash
away from you and the water will wash the dirt away
faster and easier.
7. Use the width of the spray pattern to wash in a
wide path. Overlap spray paths for complete cover-
age washing from side to side, using slow, steady
motions.
8. The nozzle should be 12" to 24" from work, closer for
tough areas. Be careful on painted or delicate sur-
faces, the pressure may damage surface if nozzle is
too close.
9. Small parts should be washed in a basket so the pres-
sure does not push them away. Larger, lightweight
parts should be clamped down so the pressure does
not push them away.
10. Turn the side detergent control knob clockwise (CW)
for detergent decrease. Wait for detergent to clear.
Always rinse with cold water after using detergent.
Rinse from the top to the bottom to prevent detergent
from dripping onto a rinsed area. For the best results,
contact your Hotsy dealer to help you select the best
detergent for your application.
to Stop
1. If detergents were used, draw clear water through the
detergent inlet line to purge detergent. Failure to do
so may clog detergent injector valve.
2. If burner was used, turn OFF burner switch and
allow pump to run cold water through coil for several
minutes.
3. Move throttle lever to idle position.
4. Turn engine ON/OFF switch to the OFF position.
5. Close fuel shutoff valve (if so equipped).
6. Turn water supply OFF.
7. Squeeze trigger of trigger gun to relieve system
pressure.
StOragE
DANGER: DO NOT store flammable liquids (gasoline,
diesel fuel, solvents, etc.) near pressure washer, or in
non-ventilated areas.
Protect from freezing by storing in a heated area, or by
flushing the system with antifreeze (use an automotive
engine antifreeze or windshield washer solvent to
antifreeze). To flush the system with antifreeze, the
following steps are to be followed:
1. Connect the water supply hose to the garden
hose connector located on the pump. Turn on water
supply.
2. Place the detergent inlet line into a container of
antifreeze.
3. Hold wand firmly, release trigger of trigger gun.
4. Start engine. Place throttle lever in Full Throttle
position.
5. Squeeze trigger of trigger gun and allow water to
flow from the end of the wand. Watch for antifreeze
to be drawn through the detergent inlet line. Allow
the antifreeze to be drawn into the system for 5 to
10 seconds.
6. Release trigger of the trigger gun and stop engine.
7. Turn off water supply and disconnect water supply
hose from the pump.
OpEratiOn inStructiOnS
Figure 5 - Detergent Injector Valve
Detergent control knob
Detergent
On
Water adjustment knob
Detergent
Off
Water
increase
Water
Decrease
Summary of Contents for 781SS
Page 33: ......
