Grasselli NAB M, Technical Manual

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NAB M
Pict. 5.4.4
REPLACEMENT OF RUBBER ROLLER DRIVE PIN
a) Dismantle rubber roller following sequence as
“ Replacement of rubber roller assembly “.
b) Dismantle right side guard (Pict. 5.4.3)
Referring pict.5.4.4
c) Loose chain stretcher ( 273 ) and open chain (10265) .
d) Dismantle rubber roller pinion ( 304 ) and take out key
(2169) .
e) Unthread rubber roller drive pin ( 9861 ) and replace it.
Should bush component replacing be required proceed as
follows :
f) Unscrew the screw that fixed bush to rubber roller side.
g) Leave out snap ring (
323
).
h) Extract bearings ( 324 ) and oil seal ( 10299 ).
i) Replace worn elements. Then reassemble everything
following preceding steps in reverse order. Grease oil seal
and bearings before inserting new rubber roller drive pin.