SERVICING THE INDIVIDUAL PARTS
D
8
–Press the inner ball bearing (1) on the balance weight
(2) onto the crankshaft with a suitable pipe
– Only press on the inner ring. Press on the balance
weight with the outer ball bearing (3) – only press on
the inner ring.
–Slide the spacing washer (4) (0.2 mm) onto the
crankshaft.
– Heat the special tool 584.29.037.037 with the new
bearing inner ring (5) on a hotplate to approx. 150° C
and immediately slide onto the crankshaft (see page D4).
– Strike on the inner ring with a suitable pipe and allow
to cool.
CAUTION: never clamp the crankshaft with the
crankshaft journal and strike on the inner ring
since this will press the crankshaft webs
together and the crankshaft can no longer be
used.
–Turn the crankshaft over and slide both spacing
washers (6) (0.1 and 0.15 mm) onto the crankshaft.
– Mount a new inner ring of the other crankshaft bearing
(7) as described above.
– Measure the axial clearance of the crankshaft after you
replace the inner rings.
BALANCING THE AXIAL CLEARANCE OF
THE CRANKSHAFT
–Place the crankshaft in the left housing half and mount
the right housing half.
– Mount the housing bolts around the crankcase and
tighten.
– Mount the dial gauge support on the engine case and
measure the axial clearance of the crankshaft.
Axial clearance 450: 0,15 - 0,25 mm
Axial clearance 501,550: 0,45 - 0,55 mm
Axial clearance 650: 0,55 - 0,65 mm
– Correct the axial clearance if the measured value does
not correspond to the setpoint value.
–To correct, remove the crankshaft and the inner ring of
the crankshaft bearing (7) and pull off of the crankshaft
with the special tool 584.29.037.037 on the ignition
side. Add or remove compensating disks and remount
the inner ring (see above).
NOTE: Add compensating disks if the axial
clearance is too large. Remove compensating
disks if the axial clearance is too small. Only
add compensating disks on the ignition side.
5
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4
2
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