5. Adjust the mounting bracket to obtain proper tension on the
V-belts and tighten the four hexagon nuts to secure the mounting bracket.
6. If further alinement of the pulleys is required, slide the
chain vise on the bracket as needed. Tighten the hexagon nut under the chain vise
to secure the vise in place.
(b) Pulley calibration. During the testing of pulley driven units
it is necessary to know the rate of rotation (RPM). Pulley size varies from unit
to unit. Calibration of the tachometer circuitry to the pulley is required. The
tachometer has a two-position selector switch which allows selection of either
DIRECT DRIVE or CAL PULLEY. The CAL PULLEY position is calibrated with the
calibration control Just to the left of the selector switch. To perform the pulley
calibration proceed as follows:
OS 010, 4-P10