Precor Precision 400 Series Service Manual page 62

4. If not installed, install the crankarms, see
page 151.
Input Drive Assembly Shaft (axle) alignment
5. Align the Input Drive shaft (axle) to the Step-up shaft (axle).
a. Measure the right side and left side distances from the center of the input drive
shaft to the center of the step-up pulley shaft. The measured left and right side
shaft alignment distances should be the same. If not, adjust the left side dis-
tance so that it equals the right side distance.
Drive belt tension adjustment
6. Use an 11/16" socket to loosen (do not remove) the left and right step-up pulley shaft
nuts.
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
5 Adjustment Procedures
Input Drive and Step-up Belt Tension Adjustment
"Crankarm Assembly Replacement" on
Page 54