Sterling MS - Manual (Page 24)

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Figure 19
A
A
B B
A A
KEY B PROJECTS TO PROVIDE A GRIP FOR REMOVING.
DO NOT OPERATE SHEAVE WITH FLANGE PROJECTING
BEYOND THE HUB END.
D3881
Blower RPM Adjustment
To adjust blower RPM:
1. Loosen and remove belt(s).
2. Match driver pulley to one found
in Figure 19.
3. Loosen set screw(s) marked A.
4. If driver pulley is equipped with
external key, marked B, remove.
5. A d j u s t d r i ve r p u l l ey p i t c h
diameter for desired speed by
opening (slower) or closing
(faster) moving parts by half or
full turns. Do not open sheave
past point where fl ange projects
past the hub end.
6. If driver pulley is equipped with
external key, marked B, replace.
7. Tighten set screw(s) marked A.
8. Replace and retension belt(s).
9. Realign drive if necessary.