Veris Technologies OpticMapper - Operating Instructions - Manual (Page 55)

Pub.# OM17-OpticMapper
6-21
Procedure #8: Bearing Repair and Replacement
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 and
repair 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 and both races (cups)
4) Veris recommends that you purchase our Coulter Hub Repair Kit (PN
32641) that includes new bearings, races, seal, o-ring and cotter pin.
5) Thoroughly wash hub in solvent and dry.
6) Spindle end may need grinding
—see spring plunger replacement
Procedure #4
7) Reassemble and adjust bearing pre-load by fully tightening spindle nut,
then backing off until you can turn the hub fairly easily with one hand –
normally this involves backing off 1- 2 slots on the castle nut, and
inserting cotter pin. Excessive pre-load may cause plugging in extremely
loose soil conditions, and excessive endplay may damage the spring
plunger. Hub should have no side play when assembled, but should turn
with little resistance. Drive round end of cotter pin firmly into nut, and bend
upper portion of cotter pin upward and trim of excess length of both top and
bottom with cutting pliers. Do not bend cotter pin over the end of
spindle as it will interfere with spring plunger.
8) Fill hub via grease zerk until grease pushes through outer bearing.
9) Install hub cap by threading counter-clockwise on the hub. Check to make
sure that hub still rotates freely. If not, the cotter pin may too long, and is
contacting hubcap
–remove cap and check cotter pin length.
10) Adjust spring plunger clearance as mentioned in Procedure #4.
Figure 8.1
Seal
Hub
Nut
Thrust Washer
Bearing
Swing arm