New Holland MN2765HAHW, Operation Manual, Page: 16 / 40

16
18 Operator's Manual
storage & maintenance
specific maintenance:
ENGINE: The engine instructions that accompany your unit detail specific
procedures for maintenance of the engine. Following the engine
manufacturer’s recommendations will extend engine work life.
PUMP: The pump oil must be changed after the first 25 hours of operation.
Once the initial oil change has been completed, it is recommended
the oil be changed every 3 months or 250 hour intervals. If oil
appears dirty or milky, changes may be required at a greater
frequency. Use the following pump oil and fill only to the center of
the oil sight glass. DO NOT OVERFILL!
NOZZLES: 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.
QUICK COUPLERS: There is an o-ring seal inside the female quick coupler. This
o-ring will deteriorate or, if the unit is allowed to pump without
the high pressure hose or nozzle attached, the o-ring may be blown
out occasionally. Simply insert a replacement o-ring to correct the
leak. (Additional o-rings can be purchased from your dealer.)
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. 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 reinstalling.
NOTE: If using teflon tape, be certain no tape gets inside any plumbing to
prevent the possibility of a plugged spray nozzle.
Model # Pump Oil
HSP SAE30W non-detergent