603695CE
4-5
REV G
CZ
DA
DE
EN
ES
FR
IT
NL
PT
SV
The safety filter does not require servicing unless it
becomes contaminated with dirt or moisture.
Recommended service procedure
1.
Release clamps and remove element. Clean the canis-
ter with a damp cloth.
2.
Before installing a new element, inspect it by placing a
bright light inside and rotating the element slowly,
looking for any holes or tears in the paper. Also check
gaskets for cuts or tears. Do not attempt to use a dam-
aged element which will allow abrasive particles to
enter the engine.
3.
Reinstall the dust cap. Make sure it seals all the way
around the air cleaner body, then tighten the clamps.
4.
Check all fittings and clamps periodically for tightness
and inspect hoses for holes or cracks.
5.
Periodically check the intake hose for signs of
ingested dust. Locate and repair the source of
ingested dirt.
6.
Never operate the machine without an air filter
installed.
Overservicing
Overservicing occurs when an air filter element is removed
for cleaning or replacement before it is necessary. Each time
the filter is removed a small amount of dirt and dust could
fall in the intake system. This accumulated dirt can cause a
dusted engine. 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, 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. 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 4-10
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.
A.
Canister
B.
Dust cap
C.
Pre-cleaner
Figure 4-8
A.
Safety filter
Figure 4-9
A
C
B
A