GMC 1976 ZEO 6083 Maintenance Manual page 571

Figure 62-Tightening Nut
Figure 63-Torque Wrench Reading
STEERING
9- 3 9
Figure 64-Stub Shaft Flat Alignment
the total number of turns. This is the "center" of the
gear. (The flat on the stub shaft is normally up and
parallel with the side cover when the gear is "on
center" (figure 64) and the block tooth on the pitman
shaft is in line with the over-center preload adjuster
(figure 65).
Figure 65-Over-Center Alignment