REV B 5-2 114242
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 ser-
vice 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 clean-
ing 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 clean-
ing or servicing in any manner because the condition of the
filter after servicing is completely out of the filter manufac-
turer’s control. Therefore, on a dust ingested engine failure,
there will be no warranty consideration if the air filter ele-
ment has been cleaned or serviced in any manner.
A partially dirty air filter element works better than a new ele-
ment. Therefore, a dirty filter element is not bad for the engine
unless it is excessively restricting the air flow and engine perfor-
mance 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.
Carbon Canister
Some FasTrak
®
SD mowers will have a carbon canister incor-
porated into the fuel system. Figure 5-4
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.
Fuel Evaporation System Filter
Some FasTrak
®
SD mowers have a fuel evaporation system
filter. This filter must be checked and replaced every 300 hours
or annually whichever comes first. Figure 5-5
NOTE: Mowers produced after serial number 12050900 and
with an EX or CE extension after the model number do not have
a fuel evaporation system filter.
Fuel & Evaporative System Line Routings
On mowers that have a fuel evaporative system installed there
are two rubber hoses that are connected to each fuel tank. One is
the fuel hose that is part of the fuel system. The other is the
vapor line that is part of the fuel evaporative system.
The fuel hose is connected to the fuel tank as shown. It
connects the fuel tank to the fuel shutoff valve. Figure 5-6, &
Figure 5-7
The vapor line is connected to the fuel tank. It connects the
Figure 5-3
Figure 5-4
Figure 5-5
Carbon
canister
Fuel evaporation
system filter
Fuel evaporation
system filter
Fuel
tank
Vapor line
Vapor line
Fuel
tank
Seat support
To Next Page
Loading...
Need help?
General
