Pressure Test; Oil Seals - Stihl MS 200 Service Manual

8.2.3

Pressure Test

Carry out the same preparations as
for the vacuum test, b 8.2.2
– Always carry out the vacuum test
before the pressure test, b 8.2.2
: Connect pressure hose (1) of
pump 0000 850 1300 to nipple
(arrow).
1
: Push ring (1) to the right.
: Operate the lever (2) until the
pressure gauge (arrow) indicates
a pressure of 0.5 bar. If this
pressure remains constant for at
least 20 seconds, the engine is
airtight.
MS 200, MS 200 T
– If the pressure drops, the leak
must be located and the faulty
part replaced.
1
To find the leak, coat the suspect
area with oil and pressurize the
engine. Bubbles will appear if a leak
exists.
– After finishing the test, push the
ring to the left to vent the pump –
disconnect the hose.
– Remove the test flange.
– Install the carburetor,
MS 200 b 14.2
MS 200 T b 14.2.1
– Remove the flange and sealing
plate.
– Install the muffler, b 8.1
– Reassemble all other parts in the
reverse sequence.
– Tightening torques, b 3.5
2
8.3

Oil Seals

It is not necessary to disassemble
the engine to replace the oil seals.
Ignition side
– Remove the fan housing, b 10.2
– Remove the flywheel, b 9.4
1
– Free off the oil seal in its seat by
tapping it with a suitable tube or a
punch.
: Apply puller (1) 5910 890 4400
with jaws 0000 890 3700.
– Clamp the puller arms.
– Pull out the oil seal.
Take care not to damage the
crankshaft stub.
– Clean the sealing face, b 16
Install only new oil seals.
– Lubricate sealing lips of new oil
seal with grease, b 16
31