Oil Bath Filter Service/Maintenance; Clean.asp.air; Lav Engines; Bv Engines Standard - Tecumseh SPECTRA 37 Service And Repair Manual

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4. CLEAN.ASP.AIR

LAV ENGINES

As illustrated in Fig 6, reverse flow air is taken from the
flywheel fan so that by centrifugal effect, all dirt and dust
and particles are removed from the intake pipe area.
The clean air enters tube A (Fig 7) and flows into a pre-
cleaning chamber B before passing through a large
dimension polyurethane air filter C.
Fig. 7
A Air enter tube
B Chamber
C Polyurethane filter
The maintenance of the polyurethane element must be
carried out following the same instructions as for the
previous type.
Essential points:
- Wash in petrol
- Dry out
- Impregnate element with a spoonful of SAE 30 oil
- Knead uniformly to distribute the oil

BV ENGINES STANDARD

The Clean-Asp-Air fitted on earliest BV engines has the
same working and element maintenance of the Clean-
Asp-Air filter on LAV range, but different design. (Fig 8).
5. OIL BATH FILTER (Fig. 9)
TO SERVICE FILTER:
The oil bath filter is only efficient when the oil is at the
level indicated on the bottom of the container (Fig 9-D).
Check oil level every five (5) hours. If not to correct level,
refill container using a similar oil to that used in the
engine. Change oil once a year or more often when
operating in extremely dusty conditions.
Clean and re-oil foam every 10 operating hours and
change it every 50 hours or more often if used in
extremely dusty conditions.
FILTER MAINTENANCE
a. Remove the cover A from the filter body (twist
counterclockwise).
b. Remove the foam filter (B) from the cover.
c. Wash in water and detergent solution and squeeze
(don't twist) until all dirt is removed.
d. Rinse thoroughly in clear water.
e. Wrap in a clean cloth and squeeze (don't twist) until
completely dry.
f. Saturate with engine oil and squeeze (don't twist) to
distribute oil and remove excess oil.
g. Clean the filter body (C) and refill with clean oil up to
level indicated (D).
h. Replace filter foam and refit cover ensuring this is
correctly secured.
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Fig. 6
Fig. 7
Fig. 8
Fig. 9