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 (b) Tighten bolt bearing and worm wheel
NOTE
locking nuts tight against their respective shoulders and lock by
If the driving lugs enter the slots in the
forcing one of the prongs on the washer into one of the slots in
friction hub the housing plate will fit tight
the nut.
against the frame.
(6) Installation. Installation is in reverse order of
(c) Tighten capscrews which hold housing
removal.
assembly to purifier.
NOTE
(d) Adjust pinion for proper mesh against
When spindle is put in frame, care should be
friction hub by turning adjusting screw (27) counterclockwise.
taken not to strike the indicator wheel or the
This will allow spring to push adjusting sleeve (6) against
worm wheel and to see that it comes to rest
bearing. Then, turn screw one-quarter turn clockwise and
upon the steel ball in the bottom screw.
clearance between sleeve and ball bearing is set.
Then fasten the top bearing cap securely in
f. Bowl Spindle.
place with the three capscrews.
(1) General. The bowl spindle is a solid shaft unit
which turns in roller bearings at the top and in a bronze bushing
g. Brake.
at the bottom. The worm screw shell is fixed to the bowl spindle
(1) General. A brake is installed on the side of the
and meshes with the helical gear from which it gets its driving
unit for stopping the centrifugal disc. The brake is operated by
force.
depressing the plunger (8, fig. 5-90).
(2) Removal.
(2) Removal. To remove brake assembly unscrew
(a) To remove the bowl spindle first remove
bushing (7) from purifier frame.
bowl and disc assembly as described in c. (2) above.
(3) Cleaning, inspection, and repair.
(b) Remove three capscrews holding bearing
(a) Inspect lining and if worn within 1/16 inch
cap and bearing (11, fig. 5-90) in place.
of screw in center of brake, remove screw and lift brake lining
(c) Remove cap from purifier ant lift entire
from brake. Replace with new lining in reverse order of
spindle assembly from purifier.
removal.
(3) Disassembly.
(b) Inspect spring (9) and if spring has lost
(a) To disassemble spindle, first ;lamp
its tension, replace it.
spindle in a vise. Be sure to use a soft material on vise jaws so
(4) Installation.
With brake assembled, screw
as not to damage spindle.
bushing (7) into position on lubricating oil purifier.
(b) To remove upper bearing, lift tab from
h. Speed Indicator.
locknut and remove nut and bearing.
(1) General. The speed indicator is located on front
(c) To remove worm screw (13), lift prong on
of the frame. Pressing on the speed indicator brings the
washer located in one of the slots of the nut.
indicator wheel in contact with the thread on the bowl spindle
(d) Place a screwdriver in one of the slots of
and actuates a movement of the small plunger for each
the nuts and tap with a hammer to loosen nut.
revolution of the wheel. When running at correct speed the
(e) Withdraw worm screw shell from spindle
plunger moves 72 times. per minute. This movement can be
noting position of key in spindle as worm screw is removed.
felt by the end of the plunger protruding through the cap.
(4) Cleaning, inspection, and repair.
(2) Removal.
(a) Check ball bearing by spinning while
(a) Remove spindle as described in f. (2)
holding in hand. Replace bearings that run rough.
above.
(b) Inspect worm screw shell; if teeth show
(b) Remove cap and withdraw two springs
signs of wear, replace worm screw or reverse it, end for end, on
and small plunger from the outside.
reinstallation.
(c) Remove wheel and sleeve from inside.
NOTE
(3) Cleaning, inspection, and repair.
When either the worm screw shell or the
(a) Remove nut from wheel shaft and inspect
shaft, wheel, and sleeve. Should shaft, wheel, or sleeve show
worm wheel ring becomes worn and needs
signs of wear, replace.
to be reversed.
They should both be
(b) Inspect springs and, if tension has been
reversed at the same time. If either has to
lost, replace them.
be replaced, replace both shell and ring.
(c) Reassemble shaft, sleeve, and wheel in
(c) Inspect steel point at end of spindle; if
reverse order of disassembly. Be sure pin in shaft enters slot in
worn, replace with a new one. To remove, drive a drift pin into
wheel hub; then tighten nut.
hole in spindle and point will drop out. To replace, dip point in
(4) Installation.
oil and position by tapping on a wooden surface.
(a) Install wheel and sleeve; making sure
(5) Assembly.
guide pin on side of sleeve enters slot in frame.
(a) Assembly of spindle is in reverse order of
(b) Install plunger and springs in reverse
disassembly.
order 'of removal and screw cap on tightly with screwdriver.
5-124
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