Tomos A31988, Руководство по ремонту, Страница: 22 / 31

Classic Cycles Technical Resources
22
Before securing the nut with washer, it is
necessary to check the proper function of the
assembly. Firmly hold the 2 nd speed driven gear
with the left hand and the clutch drum with the
right hand. When the clutch drum rotates
counterclockwise, both clutches idle. When it
rotates clockwise, the motion is transmitted to the
crankshaft (fig 62)
Fit the gasket and cover and tighten 7 screws with
torque of 10Nm (fig 63)
Turn the engine on the stand 90 degrees. Clean
residue of crankcase gasket. Mount the piston so
that the arrow sign on the top of the piston is
facing the exhaust side of the cylinder (fig 64)
Make sure the piston rings are installed properly
by aligning them with the stationary pins mounted
in the ring grooves of the piston. Compress the
piston rings and mount oiled cylinder (fig 65)
Mount the cylinder head, washers, and nuts.
Tighten them in an X pattern, torque to 12 Nm.
Turn the engine so that the magneto flywheel side
is on top. Install the stator base plate. If necessary,
slightly oil the felt inset piece of the base plate.
When mounting the magneto flywheel, take care
when positioning it. The groove on the flywheel
hub and the woodruff key on the crankshaft must
coincide. Fit the washer and nut, lock the flywheel
with the flywheel and clutch holding tool, and
tighten the nut to a torque of 30 Nm.
Place the distance bush, chain sprocket, and
protective washer on the main shaft and tighten
the nut with a 30 mm wrench. Lock the chain
sprocket with the flywheel and clutch holding tool.