6Superabrasive
User Manual Original Language
Lavina® 20GE
7/2020
36
8.9 CORRECTING DEFLECTION OF THE USED PLANETARY CHAIN
Unscrew the two bolts (Fig.8.9.1) and take out the cover. Lift the machine in position to
change the tools. Turn manually the holders in order to turn the main head, stop when you see
through the window the chain tensioner (Fig.8.9.2).
Loosen a quarter to 1/2 rev the two nuts of the chain tensioner pos.3 (Fig.8.9.2) and pos.6 (Fig.8.9.2)
the tensioner should turn with minimum clearence, without inclination, then unscrew the nuts pos.2
(Fig.8.9.2) and pos.7(Fig.8.9.2). To tension the chain pos.4 screw the nut pos.1 (Fig.8.9.2). To tension
the chain pos.5 screw the nut pos.8 (Fig.8.9.2). The tensioner of the planetary chain should allow
chain sagging 3...5mm/1/8...3/16 in/ controlled in span X
on two chain
Fig.8.9.2). When ready screw
the two nuts pos.3 and pos.6 (Fig.8.9.6) and the nuts pos.2 and pos.7 (Fig.8.9.2).
ATTENTION: NEVER “OVER” TENSION THE CHAIN,
THE CHAIN WILL BE DAMAGED
8.10 MOUNTING NEW PLANETARY CHAIN
The planetary chains are replaced with new ones when the step/drive of the chain tensioner is finished or there is a break in
the integrity of the chain. Remove the guard as shown on 8.3 DISMOUNTING/MOUNTING THE GUARD.
Unscrew the two bolts (Fig.8.9.1) and
take out the cover. Lift the machine in position to change
the tools. Turn manually the holders in order to turn the
main head, stop when you see through the window the
chain tensioner (Fig.8.9.2).
Then separate the carriage from the
main head as shown on 8.3 SEPARATING THE HEAD
FROM THE CARRIAGE. Lift the metal cover as shown on
(Fig.8.10.1 and Fig.8.10.2 )
Loosen a quarter to 1/2 rev the two nuts of the chain
tensioner pos.3 (Fig.8.9.2) and pos.6 (Fig.8.9.2) the
tensioner should turn with minimum clearance, without
Figure 8.9.1
Figure 8.9.2
6
2
3
4
5
7
8
1
X
Figure 8.9.1
Figure 8.9.2
