Leakage Testing The Bellows; Foam Filter/Polymer Sintered Filter - Stihl 029, 039 Service Manual

STIHL 029, 039
11.6.6 Leakage Testing the
Bellows
Top:
Nipple 0000 855 9200
connected to fuel line
1110 141 8600
Bottom:
Fuel line connected to
nipple on bellows
The bellows can be checked for
leaks with carburetor and crank-
case tester.
The following test is carried out with
the bellows removed from the
machine, but it can also be performed
with the bellows installed in the
machine. To do this, it is only
necessary to pull the air inlet hose off
the nipple.
Testing bellows for leaks with
carburetor/crankcase tester
1106 850 2905
- Use fuel line and nipple as
adapter to connect bellows to
gauge. Fit the fuel line on
bellows' nipple.
- Push tester's pressure hose onto
the nipple.
- Close the vent screw on the
rubber bulb and pump air into
the bellows until the pressure
gauge shows a reading of
approx. 0.1 bar (1.45 psi).
- If this pressure remains constant
for one minute, the bellows are
airtight. If not, install new bellows.
11.6.7 Foam Filter/Polymer
Sintered Filter
Top:
Removing the foam
filter
Bottom:
Removing the polymer
sintered filter
- Remove the air filter - see 11.1.
- Pull the foam filter out of the filter
box.
- Pull the polymer sintered filter out of
the filter box.
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