Stihl MS 192 T Manual page 30

If the vacuum reading remains
constant, or does not decrease by
more than 0.3 bar within
20 seconds, it may be assumed that
the oil seals are in good condition.
If the vacuum in the crankcase is
reduced further,
the oil seals must be replaced.
– After finishing the test, open the
vent screw and disconnect the
hose.
– Remove the test flange.
– Install the carburetor, b 14.2
– Release the muffler and pull out
the sealing plate.
– Tighten down the muffler.
– Reassemble remaining parts in
reverse order.
– Tightening torques, b 3.5
– Continue with pressure test
b 8.2.3
MS 192 T
8.2.3 Pressure test
Carry out the same preparations as
for the vacuum test, b 8.2.2
1
: Connect pressure hose (1) of
tester 1106 850 2905 to nipple
(arrow).
: Close vent screw (1) on the
rubber bulb.
0,4 0,6
0,2
0,8
0
1,0
: Pump air into the crankcase with
the rubber bulb until the gauge
(arrow) indicates a pressure of
0.5 bar. If this pressure remains
constant for at least 20 seconds,
the crankcase is airtight.
– If the pressure drops, the leak
must be located and the faulty
part replaced.
To find the leak, coat the suspect
area with oil and pressurize the
crankcase. Bubbles will appear if a
leak exists.
– After finishing the test, open the
vent screw and disconnect the
hose of tester 1106 850 2905.
– Continue with vacuum test
b 8.2.2
1
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