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

It is important to note that whenever an air filter element is
cleaned by any method, the person or company performing the
cleaning assumes responsibility for the integrity of the filter
from then on. The warranty for air filters expires upon
cleaning or servicing in any manner because the condition of
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. Therefore, a dirty filter element is not bad for the
engine unless it is excessively restricting the air flow and engine
performance is affected. The reason is simple. 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 actually acts as part of the filter media. When the
next round of dirt enters, the first dirt 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.
Of course, at some point the filter media becomes 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
Indicator
Figure 4-11
603695

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
system
Radiator cap
Reset
button

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
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.

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
4-7
DANGER
Figure 4-12
oil levels with quality
Recovery
tank
and viscosity
REV F