5-21. CLOTHING SEWING MACHINE ARM SHAFT AND VERTICAL SHAFT MAINTENANCE - continued.
Installation - continued.
(3) Install setscrew (3) to secure bearing assembly
Pulley must be installed with the setscrews over the flats of the shaft or the machine will be out
of balance during operation.
Secure setscrew (5) and screw (6), but do not tighten until further adjustments are made on the
(4) Install pulley (4) and secure with screw (6) and setscrews (5) located over the flats of the crankshaft