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STIHL 019 T
18
- Fit test flange with suction hose of
vacuum pump 0000 850 3501 to the
spacer flange.
- Remove the spacer flange.
- Fit the diaphragm and support plate
- Fit the spacer flange - see 10.7.
- Loosen muffler mounting screws.
- Take out the sealing plate and tighten
the screws to 7.0 Nm (5.2 Ibf.ft).
- Install the carburetor - see 10.5.2.
• Check that gasket is in good
condition or fit new one if
necessary.
- Fit spacer flange, insert screws
and tighten down to 8.0 Nm
(5.9 Ibf.ft).
• Close the vent screw (1) on the
pump.
• Operate lever (2) until pressure
gauge (3) indicates a vacuum of
0.4 bar (5.8 psi).
Note:
If the vacuum reading remains
constant, or rises to no more than
0.3 bar (4.25 psi) within 20 seconds, it
can be assumed that the oil seals are
in good condition. However, if the
pressure continues to rise, the oil seals
must be replaced
- After finishing the test, open the vent
screw and disconnect the hose.
- Remove the test flange.
• Remove the diaphragm.
• Take out the screw (1).
• Remove the support plate (2).