Cooling System; General Engine Maintenance - HUSTLER Z Diesel Operator's Manual

the filter after servicing is completely out of the filter
manufacturer's control. Therefore, on a dust ingested engine
failure, there will be no warranty consideration if the air filter
element has been cleaned or serviced in any manner.
A partially dirty air filter element works better than a new
element. A dirty filter element is not bad for the engine
unless it restricts the air flow too much and engine
performance is affected. The media in the filter must be
porous to allow air to pass through it. When dirty air passes
through the filter, the dirt plugs some of the holes in the
media and acts as part of the filter media. When the next
round of dirt enters, the first dirt layer helps filter out even
smaller particles making the filter more efficient at stopping
dirt from entering the engine. This is referred to as barrier
filtration.
At some point the filter media will become too clogged to
allow air to pass.
The mowing conditions will determine the frequency of air
filter element changing.
Air Restriction Indicator
These units have an air restriction indicator installed in the
air cleaner. Figure 4-11
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. Figure 4-11
B
A. Reset button
Figure 4-11
REV J
A
B. Indicator

Cooling System

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. Figure 4-12
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 the
mower. Check coolant level in the recovery tank located to
the left rear of the engine (Figure 4-12). 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 the system.
A
A. Radiator cap

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
recommendations, bolt torques, etc. The engine warranty is
backed by the engine manufacturer. Special attention should
be paid to applicable data which will not be duplicated here.
4-6
B. Recovery tank
Figure 4-12
with quality and
B
viscosity
603695