Stihl FC 75 - Leakage Testing Preparations; Pressure Test Procedure

-Removecarburetor,see8.2.2.
•
Fitgasketinfrontofspacer
flange.
-Setpistontotopdeadcentre
(TDC)(canbeseenthroughthe
inletport).
-Checkthatsparkplugisseated
securely.
•
Fittestflange(1)11288504200.
•
Fitandtightennuts(2).
-Removeouterscrewonmuffler.
-Backoffinnerscrewshalf-way.
•
Slidesealingplate(1)
00008558106betweengasket
andcylinderexhaustportand
lightlyretighteninnerscrews.
Note:Thesealingplatemustfill
thespacebetweenthemounting
screwscompletely.
-Carryoutpreparatorysteps,
see4.2.1.
•
Slidepressurehoseoftester
11068502905overnippleon
testflange.
•
Closeventscrew(1)onrubber
bulb.
-Pumpairintocrankcasewith
rubberbulbuntilpressuregauge
indicatesapressureof0.5bar.
Thecrankcaseisairtightifthis
pressureremainsconstantforat
least20seconds.
4.2.1 Preparations 4.2.2 Pressuretest
392RA017 VA
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392RA019 VA
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392RA018 VA
392RA020 VA
143RA046 VA
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