109
8
502 51 61-01
A
B
C
DA
502 50 30-13
502 50 30-14
Mod. 2077
Mod. 2083
Crankshaft and crankcase
Press out the crankshaft from the flywheel
side’s crankcase half.
Dismantle the ball bearings and sealing
rings.
Clean the crankcase halves and check
that the oil tank vent functions.
Fitting
Fit new ball bearings.
Place a new gasket on the clutch side’s
crankcase half and check that it has holes
for the oil tank vent and impulse passage.
Press out the crankshaft from the flywheel
side’s crankcase half with tool
502 51 61-01.
Inspect the crankshaft as per chapter
”Checking of crankshaft”.
Heat the crankcase halves and dismantle
the ball bearings and sealing rings in the
same way as described for mod. 625/
630/670.
Clean the sealing surfaces of the crank-
case halves from gasket residue.
Check that the hole for the oil tank vent is
not blocked and that the split pin is in
position.
Fitting
Fit new ball bearings.
Use the same method for both crankcase
halves as described for mod. 625/630/
670.
Push the crankshaft into the clutch side’s
crankcase half and put the sealing ring in
position.
Press in the sealing ring and crankshaft
by means of tool 502 50 30-13 (mod.
2077) and 502 50 30-14 (mod. 2083).
Make sure that the connecting rod is not
jammed against the crankcase.
Place a new gasket on the flywheel side’s
crankcase half. If necessary fix it in posi-
tion with a little grease.
Check that both guide sleeves (A) are in
position.
Check that the gasket has a hole (B) for
the oil tank vent and a hole (C) for the
impulse passage. Make sure that the
groove (D) in the crankcase half is not
blocked.