REV B 5-2 117364
It only takes a few grams of ingested dirt over the normal
service life of an engine to cause a dusted engine.
Do not clean the element, but replace with a new element
only. Cleaning used air filter elements, through improper
cleaning procedures, can get dust on the inside of the filter
causing dirt ingestion and engine failure.
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 5-4
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 5-4
Carbon Canister
Some Hustler
®
Super 104 mowers will have a carbon canister
incorporated into the fuel system. Figure 5-5
This is a mandatory feature that is required on all mowers
using gasoline engines that are put into operation in California.
These canisters should be replaced every 5 years or if they
become damaged..
Figure 5-3
Figure 5-4
Figure 5-5
Carbon
canister
Fuel evaporation
system filter
Fuel evaporation
system filter
Carbon
canister
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