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Sailrite MC-SCR Power System  |  

PoweRPluS wheel InStallatIon

adjuSt the tIMIng Belt

Insert the cogged motor pulley on the end of the 
mounted MC-SCR motor and tighten the set screw on 
the shaft flat (

Figure 9

). Align the pulley with the balance 

wheel belt groove and then really tighten down the 
screw.

Put the timing belt around the motor pulley and guide 
it up and over the PowerPlus balance wheel. Adjust the 
belt tension so that is has 1/16" slack when depressed 
at its midpoint (

Figure 10

). Adjust by moving the motor 

position in the motor bracket slots. Loosen the nuts, 
adjust the motor position, and retighten.

Reposition the belt driven bobbin winder as necessary to 
fill bobbins.

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