Heathkit SB-10 Series Troubleshooting Manual page 68

the large flat washer, lock washer, and nut.
NOTE: The amount of torque required to turn the circular dial can be adjusted by moving the dial
drive bushing up or down.
6. Push the zero set drive pulley flush with the inside of the dial escutcheon; then install the
7/16" diameter aluminum knob on the shaft of the zero set drive pulley with a 4-40 x 1/8"
setscrew. Be sure the zero set dial does not rub against the circular dial plate. They must be
separated by at least 1/64".
NOTE: The following adjustment of the front panel is critical and must be done carefully to
obtain smooth operation of the dial mechanism.
7. Align the small hole in the center of the escutcheon with the end of the LMO shaft by
carefully moving the front panel. See the inset drawing on Pictorial 3-14. Tighten the control
nuts at L, P, and R with the bottom edge of the front panel parallel with the bottom edge of
the chassis. Also, tighten the hardware at the upper corners of the front panel.
Servicing Procedures Page 68