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15
MAINTENANCE
REPLACEMENT OF GRINDING WHEEL
To replace the wheel first remove the left side cover
panel. Now, lower the left side of the grinding shaft and
raise the right side. Next, loosen the two bolts that hold
the bearing bracket on the relief hub so that that
bearings pivot away from the wheel and hub (toward
the front of the machine). See FIG 11. Press the index
finger down and the wheel and hub assembly should
move freely to the right.
Then remove the left side bearing. First loosen the
setscrews on the bearing collar then remove the four
screws that hold the bearing to the left arm.
Slide the grinding wheel hub assembly(s) off the shaft
taking note of what side the nut is on. Use the spanner
wrench to remove and replace the grinding wheel(s).
Place the grinding wheel hub assembly(s) back on the
grinding shaft. Verify that the spin hub is located
between the spin drive yoke assembly and the relief
hub is to the right of the relief drive assembly before
lowering the grinding shaft.
Reinstall the bearing on the left side of the grinding
shaft making sure to fit the pilot on the bearing into
arm. Tighten the four mounting screws, and then
tighten the setscrews to the shaft. Reinstall the left
side cover panel. Move bearing support bracket back
into place. See relief hub bearing adjustment to set the
bracket correctly.
MAKE SURE THE WHEEL(S) IS PLACED ON
THE SHAFT WITH THE SAME ORIENTATION
AS SHOWN. FAILURE TO INSTALL
CORRECTLY WILL CAUSE THE WHEEL NUT
TO LOOSEN. (THE NUT ON THE RELIEF
HUB SHOULD BE TO THE RIGHT & THE
NUT ON THE SPIN HUB SHOULD BE TO
THE LEFT.)
FIG. 10
NOTE: THE RELIEF
HUB HAS A LEFT
HAND THREAD FOR THE NUT. THE SPIN
HUB HAS A RIGHT HAND THREAD.
BEARING
RELIEF FLANGE
RELIEF WHEEL
RELIEF NUT
SPIN NUT
SPIN WHEEL
SPIN FLANGE
Loosen bolts and tip bracket
back. Press in the indexing
finger and the wheel should
slide freely to the right.
FIG. 11