Storage & Maintenance; Specific Maintenance - Mi-T-M HSP-4004-3MGK Operator's Manual

STORAGE & MAINTENANCE

SPECIFIC MAINTENANCE:

ENGINE: The engine instruction manual accompanying your unit, lists spe-
cific procedures for maintenance of the engine. Following the engine manu-
facturer's recommendations will extend engine life.
PUMP: Change the pump oil after the first 50 hours of operation. After
initial change, every 3 months or 250 hour intervals are recommended. If oil
appears dirty or milky, changes may be required in greater frequency. Use
15W20 detergent pump oil
and fill only to the center of the oil sight glass. DO NOT overfill.
COUPLERS: There are o-ring seals inside the couplers which will deterio-
rate. To replace, simply install a replacement o-ring to correct the leak. (Ad-
ditional o-rings can be purchased from your dealer.)
NOZZLE: Water flow through the spray nozzle will erode the orifice, making
it larger, resulting in a pressure loss. Nozzles should be replaced whenever
pressure is less than 85% of the maximum. The frequency of replacement
will depend upon such variables as mineral content in the water and number
of hours the nozzle is used.
FUEL WATER SEPARATOR: The fuel filter has a built in water separator.
Occasionally the water has to be drained from the separator. Follow the
procedures listed below:
1. Check the collection bowl daily.
2. Ensure the unit is off and place an oil catch basin under the fuel cartridge.
3. Loosen the drain plug to allow the fuel/water contaminants to flow into the
catch basin.
4. Retighten the drain plug when completed.
5. Dispose of drainage according to environmental regulations in your area.
BURNER AIR ADJUSTMENT: The air shutter has been factory preset for
proper operation between sea level and 2000 feet elevation at standard
conditions (60°F ambient water and air temperatures). To assure maximum
combustion efficiency at colder temperatures and higher altitudes, it will
be necessary to adjust the air supply to the combustion chamber. A smoke
spot test is recommended during any air shutter adjustment. This will aid in
maximizing the burner efficiency and avoid inefficient operation and exces-
sive sooting of the combustion chamber.
1. The machine must be running and the burner ON.
2. Take a smoke spot test to determine if more or less air is required for proper
combustion.
a. If the test is greater than a #3 smoke, turn the shutter arm
counterclockwise to increase the air flow into the combustion chamber.
b. If the test is yellowish in color, turn the shutter arm clockwise to
decrease the air flow into the combustion chamber.
3. Hold onto the air shutter adjusting arm and loosen the locking nut. Move
the shutter in 1/8" increments and retighten the locking nut after each 1/8"
movement.
4. Trigger the gun on and off slowly to make sure there is proper ignition.
Slight or no puffing on the ignition, and a smoke spot test of less than #3
smoke is good.
5. Repeat steps 2 and 3 until step 4 is attained.
LEAKS: Promptly eliminate any leaks found in the pumping system by
removing suspect parts, applying thread sealant to the threads and reinstall-
ing.
NOTE: If using teflon tape, be certain no tape gets inside any plumbing
to prevent the possibility of a plugged spray nozzle.
Operator's Manual 19