Laski VD 500, Operating Instructions Manual, Page: 31 / 39

31
1 – fixing bolts
2 – stretching bolts
For belt tension adjustment remove the side cover fixed here over the
belt drive. Check up optimal slack of belts. It should be 15,5 mm just in
the middle between both pulleys at down pressure of 50 N. If the
recommended slack value is exceeded, tighten the belts by means of necessary
replacement of the driving engine in its longitudinal grooves. Loosen the nuts of
bolted joints (1) approximately by one turn – loosen the locking nuts alternately.
Then move the engine in the required direction
.
Before belt tightening turn off the engine and let the belt drive cool
down.
Should the belts be tightened while working, the belt pulleys cooling may take
even tens of minutes!
For belt tension adjustment remove the front cover fixed over the belt drive by
means of the fixing bolts M8