Trane GRAA Installation, Operation And Maintenance Manual page 40

M M a a i i n n t t e e n n a a n n c c e e
5. Adjust driver pulley pitch diameter for desired speed by opening (slower) or closing (faster)
6. If driver pulley is equipped with external key, marked B, replace.
7. Tighten setscrew(s) marked A.
8. Replace and retension belt(s).
9. Realign drive if necessary.
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moving parts by half or full turns. Do not open sheave past point where flange projects past
the hub end.
Figure 14. Blower Belt Tension
MUA-SVX003B-EN