VESPA GT 200, Руководство по ремонту

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10.10.2 Removing the Oil Sump and Pressure Adjusting By-Pass Valve
- Remove the oil filler cap, the transmission cover,
the driving pulley assembly (with belt), and the
pinio n as described in chapter “Transmission”.
-
Drain the oil from the sump as previously
described.
-
Remove the seven screws shown in the figure
with the two rear brake fluid pipe clamps.
- Remove the spring, the by-pass piston, the
gasket and the centering dowels shown in the
figure.
10.10.3 Checking the By-Pass Valve
- Check the unloaded length of the spring.
Standard dimension:
By-pass valve spring length 2.11 in
( 54.2 mm )
- Check that the piston exhibits no signs of
superficial defects.
- Ensure that it slides freely on the crankcase and
that it provides sufficient seal.
-
If not remove any dirt or replace any defective
parts.