Graco Inc. 307-308 Pressure Washer User Manual


 
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OPERATION
Startup
Before starting, be sure
to
read the safety warnings and
setup instructions.
Check oil and gasoline levels daily and grease the pump
if necessary.
Turn on the water supply.
Trigger the gun
to
release any back pressure.
WARNING
or triggered position.
DO NOT wire or tie the gun trigger into the open
Set the choke and open the fuel valve.
WARNING
engine kickback.
You
must trigger the gun while starting, to avoid
Put your foot on the frame or wheel
to
steady the unit
when you pull the starter rope. Hold the gun in your
left
hand with the trigger open while starting the engine.
See Fig
2
for the proper stance. Brace the wand as
shown to avoid recoil.
two
or three feet
I1
ml. Repeat if necessary with the
Grasp the starter rope grip and rapidly pull
out
the cord
choke opened slightly. When the engine starts, im-
mediately release the gun trigger. Open
the
choke
gradually.
Never run the cleaning unit dry. Costly damage
to
CAUTION
the pump will result. Always be sure water supply
is completely turned on before operating.
Inspect
all
connections for any leaks. Tighten if
necessary.
Hydra-Clean Operation
Hold the spray nozzle about
2
feet
10.6
ml
from the sur-
face and completely mist-wet the object with cleaning
solution. Let
it
soak briefly, then use the spray rinse
to
"chisel" the dirt
off.
Keep the nozzle at an angle
to
the
surface, and about
6
in.
1150
mm) away. If some dirt re-
mains, repeat the procedure, letting
it
soak
a
little
unit'and trigger the spray gun
to
relieve pressure.
longer. When you have finished cleaning, shut
off
the
solution, and rinse before solution dries.
Protect surfaces that might be damaged by the cleaning
NOTE:
You
can clean off stubborn dirt better with a
stronger, heated cleaning solution.
Shutdown and Care
Of
The
Unit
CAUTION
When unit is not in use, turn off water supply.
When shutting down for the day or weekend; shut
off
unit, shut
off
water supply valve, and trigger gun
to
release pressure. Wipe
off
the unit with
a
damp rag.
Shut
off
cleaning unit when not actually spraying, for
for
over
10
minutes without spraying.
longer pump life. The pump will overheat if left running
often as necessary. Do not operate the unit with the
Check the filter screen in the water inlet connection as
inlet filter screen removed.
DO NOT try
to
adjust the unloader valve or change the
engine speed. Changing these settings may cause ex-
cessive pressure, intermittent unloader operation,
wasted fuel and increased wear on parts.
PUMP MUST NOT BE RUN DRY and must be drained
and store the unit where
it
will not be subjected
to
of water prior to exposure
to
freezing temperatures. Use
freezing temperatures. If water does freeze
in
the unit,
thaw before trying
to
start. A
50%
anti-freeze solution
may be pumped prior to cold weather storage.
Use only spray tips
that
are matched to unit
to
avoid
excessive cycling and wear of the unloader valve.
See
ACCESSORIES.
rCAUTIoNl
Let
a
frozen pump thaw in
a
warm place. Don't
temperature change greater than
100"
F
130'
C)
pour hot water on a frozen pump.
A
sudden
will crack the ceramic cylinder liners.
Do not pump caustic materials.
Before extended storage, flush the pump with light oil.
Observe oil change, gasoline, and greasing
requirements as outlined on page
2
and the engine
manual.
Avoid dragging hose over
an abrasive surface such as
cement. This causes wear and eventual rupturing.
Clean the intake
line
strainer daily.
~~~~~
307-308
3