STIHL 009, 010, 011 19
Remove the carburetor and muffler Now fit test flange 1120 850 4210
as well as the muffler gasket. together with two new gaskets (1120
129 0500 and 1120 129 0505) on the
crankcase.
Seal the cylinder exhaust port with
the sealing plate and test flange by
means of two M 5x18 flat head Secure test flange 1118 850 4210 by
screws. means of two M 5x50 screws in place
of carburetor.
Also remove the diaphragm and the
two gaskets.
.
.
ressure
est
Top:
Sealing plate 1120 855 8100 and Top:
test flange 1120 855 4200 Test flange 1120 855 4215 in position
Bottom: Bottom:
Exhaust port sealed Test flange 1118 850 4210 secured in position Sealing plate 1120 855 8105 installed
Unscrew the three pan head screws
from the oil pump, take complete oil
pump out of crankcase and
disconnect hose. Use a screwdriver
to prise off the circlip and then
remove the pump cover. Place
sealing plate on flange face - to seal
pulse hole - and screw oil pump
cover on top of it with the three
M 4x16 pan head screws.
Turn piston to top dead center
(T D.C.) and check that spark plug
is properly tightened down.
Connect tester's pressure hose to
the nipple of the test flange. Close
bleed screw on rubber bulb and
pump air into crankcase until
pressure gauge shows a reading of
0.5 bar. If this pressure remains
constant, the crankcase is airtight.
However, if the pressure reading
drops the leak must be found and the
faulty part replaced.
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