Maico MC 250 Instruction Book - page 17
with a screw driver. The puller
is then remo-
ved and the clutch
plates and springs are lif.
ted out. On the small clutch
the clutch
nut
retainer
is also lifted
out. The clutch
body
is held stationary
with
a special tool (avai-
lable through
the dealer I while the nut is
loosened and removed. The clutch
body,
clutch
housing, primary
chain, and kickstar.
ter shaft can now be removed.
25. Holding
The Clutchbody
With
Special Holding
Tool
2.9
Removal of the drive sprocket
on the
crank shaft -
The crank shaft must be
held stationary
by the same means as
mentioned
before for removal of rotor
magnet.
26. Removing
the sprocket
on the crankshaft
2.10 Splitting
the crank cases - The pull spring of the hook ratchet
is removed with
pliers after the pull
rod retainer,
pull rod, and the eight 6 mm case screws are removed.
Light pressure is applied
to the
crank shaft journal
and main gear shaft.
2.11 Removal of transmission
-
The shift fork shaft is pulled out, then the main shaft. with
slider gears
and eventually
the lay shaft. The spacer ring and three needle bearings are then lifted
out of the
hole in the final drive gear. The 32 mm nut on the outside
of the primary
sprocket
is removed by
blocking
the primary
sprocket.
The primary
sprocket
and primary
drive gear are then removed by
tapping
lightly
on it.
2.12 The shift cam and pawl can now be removed.
2.13 The crank shaft can be Iifted out of the right side.
2.14 Removing
the bearings requires heating the cases to 120°C
(240°FI
and a press.
3,
Assembly of the engine - Shimming of individual parts
3.1
The installation
of the bearings is done by heating the cases to 120°C and a press. Seals must be
coated with
locktite
on the outer surface and smeared with
a grease on the inner surface. Then they
are also installed with
a press.
3.2
The right case half is set on the mounting
stand.
3.3
The crank shaft is inserted in the right case half.
3.4
The shift cam and pawl with
springs are inserted.