Muffler On Polyurethane Air Cleaner; Polyurethane Air Cleaner With Snorkel - Tecumseh SPECTRA 37 Service And Repair Manual

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2. MUFFLER ON POLYURETHANE AIR
CLEANER
The intake muffler is fitted on the standard polyurethane
air cleaner.
The cover has been modified by adding 3 holes (Fig 2)
in order to secure the muffler by means of 3 self-threading
screws.
The muffler consists of a plastic cover with 3 air vent
tubes. These tubes are drilled and placed in such a way
as to reduce intake noise (Fig 3).
DISASSEMBLY AND MAINTENANCE
- For disassembly, first remove the muffler cover group
(Fig 4).
- Unscrew the 3 self-tapping screws and detach the 2
parts.
- Clean the inside of the muffler with petrol thoroughly.
- Clean the other elements of the air cleaner (foam, metal
grill etc) as described before.
- Re-assemble the air cleaner and fit the muffler to the
filter cover before the latter is secured to the filter body.
NOTE - The internal holes of the muffler (Fig 4) must be
always perfectly clean and should not show any moulding
defects (burrs) otherwise carburation may be affected.
3. POLYURETHANE AIR CLEANER WITH
SNORKEL
A snorkel type pre-cleaner is available to meet the
requirements of manufacturers of equipment operating
in extremely dusty conditions. This consists (Fig 5) of a
standard polyurethane filter with a specially shaped cover
to which is attached a plastic hose, carrying at the intake
end, a paper cartridge filter. The advantage of this type
of filter is to take in air from a point where dust is at a
minimum.
Servicing of this assembly is carried out in three stages:
- Paper air cleaner. Clean paper filter by compressed
air or by tapping on a hard surface. Replace if
excessively clogged.
- Hose. Wash hose from inside with a flow of water and
detergent to remove any dust deposits, check hose
for damage and loose connections.
- Polyurethane element. Service as for other types.
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Fig. 2
Fig. 3
Fig. 4
Fig. 5
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