Singer CLASS 99 instruction manual If the Machine is Treadle Operated, Belt Shifter

Class 99 & 99K

If the Machine is Treadle Operated

Loosen the hand wheel by turning motion screw L, Fig. 16, over toward you, place both feet upon the treadle and turn the hand wheel over toward you, at the same time allowing the feet to move freely and lightly with the motion of the treadle. Continue to do this until a regular and easy movement is acquired and you are able to work the treadle so that you can re-start the machine with the wheel turning toward you.

When familiar with the working movement, tighten the hand wheel by turning the stop motions screw over from you, and place a piece of material under the presser foot Q, Fig. 5. Lower the latter by means of the lifter and again work the machine without being threaded, until you are accustomed to guiding the material.

The belt should be only just tight enough not to slip. If too loose shorten and rejoin.

Belt Shifter

This device simplifies throwing off and replacing the belt. To throw off the belt, move the belt shifter to the left (see Fig. 8), working the treadle at the same time. To replace the belt, work the treadle slowly with the hand wheel turning toward you, when a revolutions or tow of the wheel will bring the belt back into its place.

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