Veris Technologies VIS_NIR Spectrophotometer - Operating Instructions - Manual (Page 45)

Pub# OM17-NIR Shank
4-6
seal failure, and an excessive amount of grease in the hub cap/commutator. On an
interval of 150 hours, 1-2 strokes of grease should be sufficient.
Figure 10
Wheel hubs --
On an annual basis, disassemble, clean, and properly repack the wheel hubs with
suitable wheel bearing grease. It is advisable to replace the seals. As with any tapered
roller bearing, proper pre-load will extend the life of the assembly. Fully tighten the nut,
then rotate backward up to ¼ turn, so that the hub turns freely, without endplay. Install
cotter pin, and reinstall hub cap.
Coulter electrode hubs --
The coulter electrode hubs operate in a significantly harsh environment, and annual
inspection is of utmost importance. The double-lip seals are designed to keep grease
in, and contaminates out, but they are the cause of practically all hub failures. It is
advisable to disassemble, clean, repack, and re-install annually. To perform this
maintenance, do the following:
1) Remove hub cap by turning in a clockwise direction (left-hand
thread
prevents loosening in operation).
2) Remove cotter pin, castle nut, thrust washer, and remove hub.
3) Remove outer bearing and knock out inner bearing using a
wooden dowel or brass rod. Be sure to match each bearing to
its location on the hub and do not mix bearings between hubs.
Natural wear will cause the bearing and race to form pattern that
is unique to that set.
4) Thoroughly wash hub and bearings in solvent and dry.
5) Replace bearings and races that show excessive wear or
pitting.
6) Pack with grease, and reassemble -- or reassemble, and pack
via grease zerk with wheel bearing or lithium grease. It is
advisable to replace the seals.
grease zerk