Schwinn none - Manual (Page 34)

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Attachment of an incorrect pedal into a crank arm will
cause irreparable damage. Before your first ride, please
check to insure your pedals are attached correctly.
Pedals & Crank Set
Look for the letters “R” for right, and “L” for left, stamped on each pedal
spindle. Start each pedal spindle by hand to avoid stripping the threads.
Tighten with a 15mm narrow open ended wrench. Note that the right
hand pedal attaches to the chainwheel side crank arm with a right-hand
(clockwise) thread. The left pedal attaches to the other crank arm and has
a left-hand (counter-clockwise) thread. It is very important that you check
the crank set for correct adjustment and tightness before riding your
bicycle. New cranks may become loose with initial use, refer to p. 73-76
for proper crank set adjustment and maintenance. Once the pedals have
been installed, remove the dust caps from the center of each crank arm.
Using a 14mm socket wrench, tighten the spindle nuts securely (approx.
350 in. lbs.) and replace the dust caps.
Dust
Cap