FRITSCH PULVERISETTE 1, Model I premium line - Manual (Page 47)

4. Turn back the 2 lock nuts (I) of the belt tensioner (25) completely
using the open-ended wrench.
5. Now, push the motor forwards towards the grinding chamber.
6. The V-belts (K) can now be removed from or placed on the fly-
wheel (22).
7. The V-belts (K) are tensioned by pulling the motor backwards
again and turning the lock nuts (I) against the belt tensioner (25).
The V-belts (K) must be tensioned evenly. This is done by alter-
nately tightening the lock nuts (I) against the belt tensioner (25).
8. If the belt tension is sufficient, re-tighten the 4 cylinder-head
screws (H) on the motor's adapter plate (24).
9. Refit the belt guard (6).
8.3 Lubricating the bearings
You should clean the guide pins (2,3) roughly after every 500 hours of
use and rub them down with machine oil.
Maintenance
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