JAWA B, Specification And Operator'S Manual

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3. REMOVING THE CHAINCASE AND THE CHAIN
To make the dismantling of the chaincase easier remove the rear wheel and the
R. H. crankcase cover. Disconnect both chaincase halves and open the chaincase
(Warning! - First remove the split pin from the screw.) Rotate the chain so that
the connecting link reaches the rear chainwheel release the clip and remove the
connecting link using pliers or a screwdriver. Pull out the chain and take in turn
the chain-case halves out rearwards.
When replacing the chain proceed as follows: slip the disconnected chain on the
gearbox sprocket and fit a piece of wire to the end finks of the chain. Using the
wire pull the chain through the rubber guide in the bottom chaincase half placed
in position. Slip the chain on the rear chainwheel and fasten with wire to prevent
it from falling into the chaincase. Using the wire pull the other end of the chain
through the rubber guide in the chaincase top half placed in position. Slip the top
end of the chain over the rear chainwheel and connect the two chainends with
the connecting link and clip. The open end of the spring clip should face the
opposite direction of the chain rotation. Insert the rubber seal between the top
and bottom halves of the chaincase, fasten the halves together by means of the
bolt and nut and seem with the split pin.
When replacing the chain it is not necessary to dismantle the chaincase. Connect
the new chain to the old one and with its help pull the new chain to its operational
position.
4. REMOVING THE REAR CHAINWHEEL
This operation can be carried out after the rear wheel and the chaincase have
been removed, Slacken the chainwheel nut (32) and remove the chainwheel
together with the back plate,
5. REPLACING THE WHEEL BALL BEARINGS
Remove the brake drum back plate with the brake shoes. Remove the seals from
both sides of the wheel hub and on the side