TM 10-3930-653-14&P (13) Install tapered roller bearing cup. Fig. 4 -369. (14) Install shim and cap. Fig. 4-370. (15) Measure the backlash between output shaft and spiral bevel gear. Fig. 4-371. (16) Spread spiral bevel gear teeth with red minimum and   check   for   the   meshing   condition   in   the following manner: Fig. 4-372. ADJUSTMENTS OF BACKLASH ON BEVEL GEAR AND OUTPUT SHAFT 1 Dissolve some red lead in oil and apply on 7 to 13 teeth of the spiral bevel gear evenly. 2 Turn the ring gear to check gear-tooth contact bearing on the bevel gear. 3 If gears are contacted improperly, adjust the gear-tooth contact of the spiral bevel gear and output shaft gear in the following manner to obtain the correct backlash. 4 -180