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Procedure #8: Bearing Repair and Replacement
The turbo coulter (electrode #1) hub operates 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:
Seal
Hub
Nut
Thrust Washer
Bearing
Swing arm
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 #5
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 #5.
Figure 8.1
6-12
Pub# OM22-iScan EC-OM
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