Veris Technologies OpticMapper - Operating Instructions - Manual (Page 45)

Pub.# OM17-OpticMapper
6-11
Procedure:
1) Remove hub cap by turning clockwise with a pipe wrench or large
adjustable wrench
– these caps have left hand thread to prevent loosening
during field rotation.
2) If plunger is frozen in cap, remove allen head set screw on top of plunger
and apply penetrating oil on both sides of plunger. Let this stand for a few
minutes and try to remove. If it will not back out with allen wrench, lock
vise grips on the inside portion and turn out through inside of hub.
3) Clean all hub cap surfaces, install new o-ring, coat plunger and set screw
with di-electric grease and install as outlined above.
4) At the same time, inspect the end of the spindle. Over time the plunger will
wear a slight depression in the spindle face. This is common, and more
noticeable on high acreage units, or units that have been operated at high
field speeds. If the depression is 1/6” or more, carefully grind the face of
the spindle. Cover the bearing with a cloth or towel to prevent grinding dust
from entering the hub and bearings..
5) Re-install hub cap and tighten firmly. You may have to re-set the plunger
to compensate for the reduced length on the newly ground spindle. Re-
adjust as outlined above.
Note: If you are still unable to obtain favorable resistance readings, check for excessive corrosion
at the coulter blade mounting bolts, or the terminal located near the coulter pivot. It may be
necessary to grind the spindle end smooth, if a dimple has developed.