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20
STORAGE & MAINTENANCE
SPECIFIC MAINTENANCE:
ENGINE:
The engine instruction manual accompanying your unit, lists specific
procedures for maintenance of the engine. Following the engine
manufacturer'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 SAE30W Non-Detergent pump oil. (Grainger Item
# 4ZF21) 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 deteriorate.
To replace, simply install a replacement o-ring to correct the leak.
(Additional 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 excessive sooting of
the combustion chamber.
1. The machine must be running and the burner ON.
2. GH-SMALL FRAME SERIES:
a.
If the test is greater than a #3 smoke, turn the shutter
arm clockwise to increase the air flow into the
combustion chamber.
b.
If the test is yellowish in color, turn the shutter arm
counterclockwise to decrease the air flow into the
combustion chamber.
GH-LARGE FRAME SERIES:
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 reinstalling.
NOTE: If using teflon tape, be certain no tape gets inside any plumbing to
prevent the possibility of a plugged spray nozzle.
GH-Series Operator's Manual
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