Sunny Health & Fitness SF-RB921 - Manual (Page 8)

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STEP 3:
Secure Pedals (14L/R) to the Crank (15) on the Main frame (1).
★ IMPORTANT: The Left Pedal (14L) should be screwed on
counter-clockwise to tighten. The Right Pedal (14R) should be screwed
on clockwise to tighten. You can screw in by hand first and then tighten
by spanner securely.