Filter
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air to pass.
The mowing conditions will determine the frequency of air filter
element changing.
Air restriction indicator
Some Hustler units have an air restriction indicator installed in the air
cleaner. Fig. 4-9
Replace the element whenever the restriction indicator reaches the
change filter red line. Check the indicator daily and replace element as
needed or annually whichever occurs first.
Reset the indicator by pushing in on the yellow button after each element
change. Fig, 4-9
Cooling system - liquid cooled units
Gasoline units
DANGER: Never remove radiator cap or overflow reservoir
cap when engine is hot. Pressurized hot steam and water may
be released, causing serious burns or possible blindness. Fig.
4-10
Engine cooling is accomplished with circulated water and Ethylene
Glycol mixture. The radiator is equipped with a pressure cap and overflow
reservoir. Follow the information found in the engine owner’s manual for
the recommended coolant solution.
Visually inspect the system daily prior to operating tractor. Be sure the
engine is level. Check the coolant level only when the system is cold.
Check the coolant level only at the overflow reservoir (Fig. 4-10). The
cooling system is a closed type. Never open the radiator cap. Doing so
may induce air into the cooling system and may cause overheating. The
coolant level should be between the “H” and “L” marks.
Diesel Units
DANGER: Never remove radiator cap or overflow reservoir
cap when engine is hot. Pressurized hot steam and water may
be released, causing serious burns or possible blindness. Fig.
4-11
Engine cooling is accomplished with circulated water and Ethylene
Glycol mixture. The radiator is equipped with a pressure cap and recovery
tank. A 50-50 mixture is recommended for all season operation. This
mixture provides freeze protection to -32 degrees F (-35 degrees C).
Should temperatures fall below this level, additional Ethylene Glycol must
be added to the mixture.
Visually inspect the system daily prior to operating tractor. Check
coolant level in the recovery tank located to the left rear of the engine (Fig.
4-11). When the engine is cold the coolant should be up to the cold mark
on the recovery tank. When the engine is hot the coolant should be up to
the hot mark on the recovery tank. When adding coolant, pre-mix the
solution before adding it to the recovery tank. It is not necessary to remove
radiator cap for adding small amounts of coolant to system.
General engine maintenance
Detailed instructions and recommendations for break-in and regular
maintenance are specified in the Engine Owner’s manual. Please refer to
this manual for engine servicing, lubricating oil levels with quality and
viscosity recommendations, bolt torques, etc. The engine warranty is
backed by the manufacturer. Special attention should be paid to applicable
data which will not be duplicated here.
IMPORTANT: Refer to the Kohler EFI engine owner’s manual for
specific cleaning instructions.
Belts
Inspect belts frequently for wear and serviceability. Replace a belt that
shows signs of severe cuts, tears, separation, weather checking and
cracking, or burns caused by slipping. Slight raveling of belt covering does
not indicate failure, trim ravelings with a sharp knife.
WARNING: If the pump belt fails, loss of control will occur
especially when operating on a slope. If you lose steering
control while operating the machine, place the steering
control levers in the park brake position immediately.
Inspect the machine and involve your Hustler dealer to
resolve the problem before continuing to operate.
Inspect the belt pulley grooves and flanges for wear. A new belt, or one
in good condition, should never run against the bottom of the groove.
Replace the pulley when this is the case, otherwise belt will lose power and
slip excessively.
Never pry a belt to get it on a pulley as this will cut or damage the fibers
of the belt covering.
Keep oil and grease away from belts, and never use belt dressings. Any
of these will destroy the belt composition in a very short time.
Figure 4-11
Recovery tank
Radiator cap
Shibaura diesel shown
Figure 4-10
Overflow reservoir
Radiator
Screen
Super Z liquid
cooled shown
Radiator cap
601656_1108
29
Figure 4-9
Indicator
Reset
button