Superabrasive
User Manual
Original Language
Lavina® 25-X
9/2018
17
8.4 CORRECTING SAG OF THE USED PLANETARY CHAIN
Unscrew the eight bolts (Fig.8.4.1) and remove the cover (Fig.8.4.2). Pull the hose out of the
water sprayer(Fig.8.4.3). Put the machine in position to change the tools. Manually turn the
holders in order to turn the main head, stop when the chain tensioner can be seen through
the window (Fig.8.4.4).
Loosen the two bolts of the chain tensioner a quarter to a half revolution(Fig.8.4.5). The tensioner should turn with minimum
clearance, without inclination, then unscrew the inner nut. To tension the chain screw, tighten the outer nut (Fig.8.4.6). The tensioner
of the planetary chain should allow chain sagging of 3...5mm (1/8...3/16 in) measured in span X (Fig.8.4.7). When set, screw the two
nuts (Fig.8.4.6) and the screw(Fig.8.4.5).
ATTENTION: NEVER “OVER” TENSION THE CHAIN,
THE CHAIN WILL BE DAMAGED
8.5 MOUNTING NEW PLANETARY CHAIN
The planetary chain is replaced with new one when the step/drive of the chain tensioner is finished or there is a loss of integrity of the
chain.
Unscrew the eight bolts (Fig.8.4.1), take off the cover (Fig.8.4.2), and pull the hose out of the water sprayer (Fig.8.4.3). Put the machine in
position to change the tools. Manually turn the holders in order to rotate the main head, stopping when the chain tensioner can be seen
through the window (Fig.8.4.4). Separate the carriage from main head, and pull out the motor plug (Fig. 3.1), water tubes, and vacuum
tubes (Fig. 3.2) (Fig. 3.3). Take off the handle (without water tubes) (Fig. 8.4.3). Release the pin sets (Fig. 3.4) attaching the head to the
carriage. Take off the weight holders(Fig. 8.5.1), machine support(Fig. 8.5.2), and the service window (Fig. 8.4.2) so the top cover can be
removed(Fig. 8.5.3).
Figure 8.4.7
X
Figure 8.4.5
Figure 8.4.6
X
Figure 8.4.1
Figure 8.4.2
Figure 8.4.3
Figure 8.4.4
Figure 8.5.1
Figure 8.5.2
Figure 8.5.3
