Troy-Bilt 8 HP - Manual (Page 54)

Air cleaner maintenance
Y our engine is equipped w ith a
dual elem ent air cleaner that filters
the air tw ice before it reaches the
carburetor. The outer foam pre­
cleaner filters the air first. The inner
dry paper elem ent then filters the
air a second tim e.
It is vitally im portant that both air
filters be kept clean and properly
installed at all tim es. A dirty,
clogged filter can cause hard-
starting, stalling, or overheating
problem s. A n im properly installed
or dam aged filter can allow un­
filtered air into the engine, result­
ing in prem ature engine w ear and
dam age. N ever operate the engine
w ithout both air filters installed.
C lean and re-oil the foam pre­
cleaner elem ent every 25 operat­
ing hours, or sooner if operating
conditions are extrem ely dusty or
dirty. C leaning the elem ent as often
as every 10 operating hours should
not be considered excessive.
IMPORTANT
W hen servicing the air cleaner,
take extra precautions to prevent
dirt or other detiris from entering
the carburetor. C lean the cover and
sill rounding areas cr.refully before
rem oving the covet.
A
WARNING
To help avoid personal injury, stop
the engine, rem ove the electric
start key, disconnect the spark
plug w ire, and let the engine and
m uffler cool before inspecting or
servicing the air cleaner.
A fter every 25 operating hours,
check that the inner dry paper ele­
m ent is tightly secured against the
m ounting base. If loose, unfiltered
air w ill bypass the elem ent and be
draw n directly into the engine.
R eplace the inner dry paper ele­
m ent every 100 operating hours,
or sooner if it is dirty or torn
(inspect the elem ent w henever the
foam elem ent is rem oved for clean­
ing). W e do not recom m end trying
to clean a dirty paper elem ent, as
it is alm ost im possible to rem ove
every trace of dirt and other harm ­
ful particles.
A. Cleaning the foam
precleaner
1.
R em ove knob (7 H P engine) or
w ing nut (8 HP engine) and rem ove
air cleaner cover.
2. G ently rem ove the foam filter
from paper elem ent. See P hoto
6-52 or 6-53.
3. Inspect foam filter and the
paper elem ent for excessive w ear,
dam age or im proper fit. D o not
reuse if condition is questionable.
4. W ash the foam filter in a w arm
w ater/liquid detergent solution.
5. R inse foam filter w ith clean
w ater and squeeze (do not tw ist or
w ring) out excess w ater. Let filter
air dry.
6. S aturate foam filter w ith clean,
fresh engine oil and squeeze (do
not tw ist or w ring) out excess oil.
7.
R einstall foam filter over paper
elem ent, m aking sure foam filter
com pletely surrounds the paper
filter.
8. C lean the inside of the air filter
cover and replace cover securely.
Replacing the paper element
1.
R em ove the air cleaner cover
and foam precleaner as described
in Steps 1 and 2 of “C leaning the
foam precleaner.”
2. O n the 7 HP B riggs & S tratton
engine, rem ove the w ing nut, cup,
and paper elem ent. See P hoto 6-54.
O n the 8 H P K ohler engine, re­
m ove the hex nut, elem ent cover,
and paper elem ent. See P hoto
6-55.
3. H old the filter up to a strong
light and inspect it for cleanliness,
tears or punctures. If very dirty,
torn, bent or dam aged, replace it
w ith a new elem ent.
4. C lean the base plate and the
inside of the air cleaner cover,
being careful not to let any dirt
enter the breather hole in the base
plate. M ake sure the base plate is
secure, and is not bent or dam aged.
5. Install paper elem ent over stud
and reinstall parts rem oved in Step
2. Tighten the nut firm ly to ensure
a tight seal at the top and bottom
of the paper elem ent.
6-52: Foam filter on 7 HP engine.
■
6-53: Foam filter on 8 HP engine.
i-^ ^
6-54: Paper filter on 7 HP engine.
“ ■ ■>■■■ V ‘ \
6-55: Paper filter on 8 HP engine.
6. R einstall the foam filter (w ashed
and oiled) over the paper elem ent,
m aking sure that the foam filter
com pletely surrounds the paper
filter.
7. R einstall the air cleaner cover
and secure w ith nut.
N O TE: W hen reinstalling the air
cleaner cover on the 7 H P B riggs &
S tratton engine, m ake sure that
the slot in the side of the cover
points inw ard, tow ard the engine.
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