Dynacraft SINGLE SPEED Owner's Manual page 107

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DETAILED MAINTENANCE
Cotterless Crank Replacement
1. Replace the crank arm onto the axle.
2. Tap the crank arm lightly with a mallet.
3. Refit the washer and tighten flange nut or bolt securely to
a torque of 27Nm.
4. Replace the dust cover.
Adjustment After Use
1. Remove dust cap.
2. Tap the crank arm lightly with a mallet.
3. Retighten the flange nuts and refit the dust caps.
Mallet
New cotterless cranks may become loose with initial
use. Tighten the flange nuts (see illustration below) after
several hours or riding, and repeat it two or three times
after further use. Cranks should then remain tight.
CAUTION