Maico MC 250, Инструкция

Страница: 18 / 19

3.5 The final drive gear, spacer ring and three needle bearings, main shaft with sliders, lay shaft with
sliders, and shift forks are re-fitted. The shift fork shaft can then be re-Iocated.
3.6 A new greased center casegasket is fitted on the caseand the left case half is re-fitted with the eight
6 mm case screws.
3.7 The shimming of the crank shaft and transmission is done with the help of the sketch provided.
27. Shimming the layshaft
28. Shimming the crankshaft
3.8 The transmission is tested in the individual gears to see if the shift forks have sufficient play. If
this is not the case, the problem must be remedied.
3.9 The kickstarter shaft and coil spring are re-inserted and rotated clockwise until there is sufficient
tension. This is usually 1.!..revolutions. The hook ratched and pull rod are re-inserted and the pull
spring re-Iocated on the
2
hook ratchet.
3.10 The clutch is inserted next with the main drive sprocket and the primary chain. (Be careful not to
forget the washer between mainshaft bearing and the clutch housing and body). Check to see if
plates are warped or the teeth on the plates are worn. Replace worn out parts.
3.11 Never use more than 20 clutch springs (MC250 - 18 double (0) and MC 400, 440, 501 - large tri-
plex clutch, 20 single ( ) (
l.)
3.12 The primary casecover is re-installed. Be sure the hole in the shift shaft is in line with the pin on
the pull rod.
3.13 The piston is heated lightly and with the help of an aluminium pin, the piston pin is re-installed.
The two piston pin circlips are inserted. Be sure they fit in the grooves completely.
3.14 A base gasket is re-fitted and the cylinder re-mounted.
3.15 The cylinder head is then re-mounted only securing it with the three front bolts, not torquing them
down until the engine is back in the frame, and a softened head gasket is fitted. (This is achieved
by heating the gasket to red-hot and then placing it in cold water!. The head nuts are torqued to
1B foot pounds.
3.16 Gear box is filled with 1 liter gear oil (oil filler screw SW 19).