Precor UBK13 Service Manual page 31

Vertical upright & recumbent bicycles
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Figure 17: Crankarm & Crankarm Removal Tool
Removing the Primary Drive Belt
8
Slightly loosen the three idler pulley bracket mounting bolts.
9
Loosen the adjustment bolt lock nut.
10 Turn the adjustment bolt counter clockwise as required to remove the tension from the primary
drive belt.
Figure 18: Drive Belt Adjustment
11 Remove the primary drive belt.
Removing the Primary Pulley
12 Remove the 32mm retaining nut from the center of the primary pulley while holding the opposite
side crank arm and pedal, turning counterclockwise.
13 Remove the primary pulley.
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