(3) Give flat surface of engine sprocket, near outer edge, a light but sharp rap with a hammer, being careful not to strike and damage sprocket teeth. Take care not to lose sprocket shaft key.
b. Install. If new sprocket is being installed, it may be necessary to shift transmission forward to get chain to fit on sprockets (par. [59]).
(1) Thoroughly clean engine shaft taper and see that key is in place. Clean sprocket taper hole, fit front chain on sprocket teeth, and rotate chain until keyway in sprocket lines up with key in engine shaft. Slip sprocket onto engine shaft, install nut, and tighten securely. Strike wrench with a hammer to make sure sprocket nut is very tight.
(2) Install front outer chain guard (par. [102]).
66. REPLACEMENT OF COUNTERSHAFT SPROCKET.
a. Remove.
(1) Remove foot starter crank (par. [55]).
(2) Remove starter crank spring (par. [56]).
(3) Remove countershaft sprocket cover (par. [52]).
(4) Bend back extension of sprocket nut lock.