Refitting the oil sump
- Refit the by-pass valve plunger in its housing.
- Insert the pressure-regulating spring.
- Fit a new sump seal.
- Refit the sump, taking care to locate the spring in
the appropriate recess machined into the inside of
the sump.
- Refit the rear brake transmission support brack-
ets and the screws in the reverse order from which
they were removed.
- Tighten the screws to the prescribed torque.
- Refit the drive pulley assembly, the drive belt, the
sprocket wheel and the transmission cover, as de-
scribed in the "Transmissions" chapter.
- When testing the lubrication system, refer to
the "Crankcase and Crankshaft" chapter, re-
garding lubrication of the crankshaft and con-
necting rod
Locking torques (N*m)
Locking torque 11 ÷ 13
Fuel supply
- Disconnect the fuel supply and the suction taking
pipe from the carburettor.
- Check that there are no fuel leaks between the
two tubes.
- Close the fuel outlet pipe.
- By means of the MITIVAC pump apply 0.1 bar of
suction to the tap.
- Make sure that the suction is kept stable and that
and that there are no fuel leaks.
- Reconnect the suction pipe to the manifold.
- Position the fuel pipe with the outlet at the point
of the tap.
- Turn the engine by using the starter for five sec-
onds with the carburettor at minimum.
- Take up the fuel by means of a graded burette.
Fly 125 - 150 4T Engine
ENG - 139
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