Air Cleaners; General Information; Operation; Components - Tecumseh V-twin Technician's Handbook

GENERAL INFORMATION

The air cleaner is the device used to eliminate dust and
dirt from the air supply. Filtered air is necessary to assure
that abrasive particles are removed before entering the
combustion chamber. Dirt allowed into the engine will
quickly wear the internal components and shorten engine
life.
The TVT series engine uses a paper-type air filter system
and also has a dry foam pre-filter.
Extremely dirty conditions require more frequent pre-filter
cleaning or paper element replacement.

OPERATION

The air filter cover secures and seals the paper filter
element in place. The cover also prevents large particles
from entering the filter body and completes the Kleen-
Aire circuit. The air is first filtered through the flywheel
®
and blower housing then enters the air filter cover. It
travels through the pre-filter then the paper filter element.
Pre-filters typically extend the paper filter life.
(Illust. 2-1)
CHAPTER 2. AIR CLEANERS
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COMPONENTS

The cover holds the poly pre-cleaner and clamps the
paper filter in place, creating a dirt tight seal. The cover
also prevents large debris from entering the filter body.
The pre-cleaner is made of a polyurethane foam and
designed to pre-filter the air prior to it passing through
the paper filter. This added stage, assures the operator
of maximum air filtering and extends paper filter life.
The paper filter element is the main filter to stop
impurities from entering the engine. This dry-type element
is pleated paper for increased surface area maximizing
its life. The filter has rubberized edges to assure sealing.
(Illust. 2-2)

TROUBLESHOOTING AND TESTING

If the engine's performance is unsatisfactory (runs
unevenly, starts smoking abnormally or loses power),
the first engine component(s) to be checked are the air
filter(s). A dirt restricted or oil soaked filter will cause
noticeable performance problems. Polyurethane pre-filter
can be cleaned following the service procedure listed
under "Service" in this chapter. A paper-type air filter can
only be replaced NEVER attempt to clean a paper filter.
The paper-type filter must not have any oil film or residue
present. Should the paper have a brown tint it may have
been damaged by an excessively oiled pre-filter or
crankcase breather problems. Follow the procedure listed
in the "Service" section of this chapter for filter
replacement or cleaning.
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