To distinguish them very clearly the housing of the
20
mph.
engine is painted yellow-brown and the one for
the 25-30 mph. engine is painted red-brown.
To prevent the clutch housing and clutch hub from
wearing,
a steel washer 15 x 28 x .5 mm (.59 x 1.1 x
.020") nr.
11
in pict. 4 is fitted on the crankshaft.
Take
care
that this washer is well centered on the crank-
shaft!! When fitting this washer it is better to put the
crankshaft in a vertical position.
In
front of this steel washer a saucer spring has been
placed.
The hollow side of this saucer spring must be on
clutch side (opposite engine side).
This is very important!
Only the 25-and 30 mph. engines have a second steel
washer (12 x 24 x .5 mm. .47 x .95 x .020") in front of the
saucer spring, to assure sufficient clearance between
cultch hub and clutch housing.
Replacement of one of the parts 1 to 5 pict 5 has to be
followed by checking the total clearance of the clutch by
means of a feeler-gauge as shown in pict. 6.
This clearance has to be
between
.5 and .9 mm (.020 and
.035").
If this clearance is too small the cause may be an
undulated endplate or pressure plate, or because of the
shape of the screwed spring ends.
The 6 nuts holding the total clutch packet have to be
loosened before dismantling the clutch.
Secure the clutch by placing a screw driver between two
of the nuts.
Press on clutch packet to prevent undulated washers
from snapping away, when removing last nut.
Flatten the tab washer nr. 12 pict. 4. Use tool nr.
48.50.05 as a steady and loosen the central nut. Next
take the reverse side of tool 48.50.05 and fit it to the
clutch hub, tighten it with 2 nuts, screw the pin of the
little end bush press into the threaded hole and pull of
the hub from the crankshaft as shown in pict. 7.
The clutch housing can be pulled off by hand.
When reassembling the clutch be sure of the right order
of the steel washers and saucer spring and the right
position of the saucer spring.
Always take a new tab washer and flange the tab
washer against one of the nut sides, after tightening the
nut.
Between clutch housing and clutch plate a leafspring
nr. 13 pict. 4 is fitted on one of the clutch plate cams.
The only purpose of this spring is to prevent any noise
while the engine is idling.
It does not interfere with the clutch function.
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