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III ENGINE
1. Removing engine from frame
a) Remove the engine guards.
b) Detach the spark plug cable, the fuel hose, and the
throttle cable.
c) Disconnect the leads of the electrical equipment.
d) Disconnect the chain of the secondary transmission.
e) Disconnect the exhaust pipe from the engine.
f) Remove screws fastening the engine to the frame,
and lift off the engine.
Clean well the surfaces of the engine, and drain the oil
from the automatic transmission case. During engine
dismantling, clean immediately all the removed parts
and put them aside in the order of their removal, so that
they can be reassembled correctly and in the shortest
possible time.
2. Removing cylinder head, cylinder and piston
a) Unscrew the four M6 nuts and lift them off together
with washers from the studs.
b) Remove the cylinder head.
c) Remove the cylinder (Fig. 5)
d) Remove the circlips securing the gudgeon pin and
use the drift No. 50-12000-1.1 (Fig. 6) to drive out
the gudgeon pin.
Take care not to spill the dia.. 2 x 8 mm needle rollers
of the gudgeon pin (there are altogether twenty five).
The maximum permissible ring gap of a worn piston
ring is from 0.6 mm to 0.8 mm.
Check the dimension for grading the pistons in the
individual classes 34.5 mm. From the piston base (Fig.
7)
ZVL model 210 Workshop Manual Page 10 jkw
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