MAINTENANCE AND SERVICE
OPERATOR’S MANUAL PRESSURE WASHER
14
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 crankcase or waste oil in your burner. Fuel machine malfunction could result from contamination.
Ignition Circuit:
Periodically inspect wires, spring contact and elec- trodes for condition, security and proper spacing.
(CAUTION: 10,000 VOLTS)
Electrode Setting:
Gap
1/8”
3/16”
Side View
(See illustration below)
Electrodes Check : Periodically check wiring connections. If necessary to adjust electrodes, use diagram.
Burner Nozzle:
Keep the tip free of surface deposits by wiping it with a clean,
Nozzle | Pressure Washer GPM |
1.50 | 2 - 3 |
1.75 | - 4 |
2.00 - 2.25 | 4 - 5 |
All nozzles should be 45° W
Fuel Control System:
The machine utilizes a fuel solenoid valve located on the fuel pump to control the flow of fuel to the com- bustion chamber. This solenoid, which is normally closed, is activated by a flow switch when water is flowing through it. When an operator releases the trigger on the spray gun, the flow of water through the flow switch stops, turning off the current to 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 eliminating high and low water temperatures, and combustion smoke normally associated with machines incorporating a spray gun. Periodic inspection is recommended to insure 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 5/32” allen wrench (located on the fuel pump) clock- wise to increase, counterclockwise to decrease. Do not exceed 200 PSI.
Field Repair
Instructions
Fuel Pump:
1.Remove the screws 10/32” Allen Head from the machine hood.
2.Remove louvered hood.
3.With a 9/16” wrench, loosen (DO NOT REMOVE) the two 3/8” x 3/4” HH NC serrated flange bolts that secure the front panel.
4.With a 2.5 mm hex head wrench (Allen Wrench), loosen the three set screws that hold the fuel pump in the blower motor housing located on Idromatic Boiler Assembly.
5.Carefully remove the fuel pump (Item #53) from the blower motor, leaving the flexible zinc fuel line connected, carefully bend the fuel line and fuel pump away from the blower motor.
6.Locate the fuel pump/fan motor coupling.
7.Inspect the coupling for damage. The inside diameter of fuel pump coupling requires flat on one side to engage fuel pump, and the outside diameter requires two male notches to engage the blower motor.
8.Perform a check to see if the fuel pump is turning freely. Use an open end 7mm wrench or small adjustable wrench on fuel pump shaft.
9.Spin the fuel pump over in both directions using the wrench for leverage. When the fuel pump is turning freely (almost to the point you could turn it by hand) it is ready to reinstall.
10.Align fuel pump coupler on pump shaft/fan motor. Slide pump into fan motor. Secure pump with the three set screws.
