LifeSpan Treadmill Owner's Manual page 9

STEP 6:
FLITE
1. Press the Left Side Rail (22A) and Right
Side Rail (22B) onto the Running Board
along the inner side rail.
Note: Before assembling the side rail, please check
the back end cover (15 and 16), loosen the bolt (68)
on the back end cover, and then pull back the
cover. After assembly, pull forward the cover, and
tighten the bolt
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