Veris Technologies VIS_NIR Spectrophotometer - Operating Instructions - Manual (Page 46)

Pub# OM17-NIR Shank
4-7
7) Adjust bearing pre-load as mentioned above. Excessive pre-
load may cause plugging in extremely loose soil conditions, and
excessive endplay may damage the commutators.
8) Inspect the sealing o-ring on the hub cap, and reinstall by
threading counter-clockwise on the hub.
9) Adjust commutator clearance as mentioned above in section on
commutator adjustments.
Figure 11
Seal
Hub
Nut
Thrust Washer
Bearing
Swing arm