12
HOT WATER PRESSURE WASHER
OPERATOR’S MANUAL
97-6131, 97-6140 • Rev. 3/04
CAUTION: The coil weighs about 80 lbs. Use proper
lifting techniques.
4. Clean, repair and replace the coil by reversing the
above steps.
Coil Reinstallation
Reinstall by reversing the above steps 4 through 1.
Rupture Disk
If pressure from pump or thermal expansion should ex-
ceed safe limits, the rupture disk will burst, allowing high
pressure to be discharged through hose to ground. When
the disk ruptures, it will need to be replaced.
Fuel:
Use clean fuel oil that is not contaminated with water and
debris. Replace fuel filter and drain tank every 100 hours
of operation. Use Kerosene No. 1 or No. 2 Heating Fuel
(ASTM D306) or diesel only. NEVER use gasoline in your
burner tank. Gasoline is more combustible than fuel oil
and could result in a serious explosion. NEVER use crank-
case or waste oil in your burner. Fuel unit malfunction
could result from contamination.
Ignition Circuit:
Periodically inspect wires, spring contact and electrodes
for condition, security and proper spacing. For transformer
test (CAUTION 10,000 VOLTS) use defect free insulated
screwdriver and keep fingers off blade! Lay blade across
one contact: OK if arc will span 1/2" between end of blade
and other contact.
Electrode Setting - Wayne:
(See illustration below)
Electrodes Check: Periodically check wiring connections.
If necessary to adjust electrodes, use diagram.
Gap
1/8"
3/16"
Side View
1/8"
3/8"
1/2"
2-7/8"
Electrodes
Nozzle
Adapter
Top View
Electrode Setting - Beckett:
(See illustration below)
Burner Nozzle:
Keep the tip free of surface deposits by wiping it with a
clean, solvent-saturated cloth, being careful not to plug
or enlarge the nozzle. For maximum efficiency, replace
the nozzle each season.
Fuel Control System:
This machine utilizes a fuel solenoid valve located on the
fuel pump to control the flow of fuel to the combustion cham-
ber. This solenoid is activated by a pressure switch located
on the unloader valve. When an operator releases the trig-
ger on the spray gun, the pressure drops, allowing the pres-
sure switch to activate the fuel solenoid. The solenoid then
closes, shutting off the supply of fuel to the combustion
chamber. Controlling the flow of fuel in this way gives an
instantaneous burn or no burn situation, thereby eliminat-
ing high and low water temperatures, and combustion
smoke normally associated with machines incorporating
a spray gun. Periodic inspection is recommended to in-
sure that the fuel solenoid valve functions properly. This
can be done by operating the machine and checking to
see that when the trigger on the spray gun is in the off
position, the burner is not firing.
Fuel Pressure Adjustment:
To adjust fuel pressure, turn the adjusting screw with a
standard screwdriver (located on the fuel pump) clock-
wise to increase, counterclockwise to decrease. Do not
exceed 200 PSI.
Electrodes Check: Periodically check wiring connections.
If necessary to adjust electrodes, use diagram.
5/32" Gap
5/16"
Side View
1/16"
Top View
Electrode
Nozzles