TM 9-4910-683-14&P
1-40.
Tighten Thumbscrew (100) to lock Cross Slide (102).
1-41.
Engage the Shifter Lever Assembly (71) to the Finish Cut position.
1-42.
When Tool Bit leaves the drum, the drum should have an accurate and smooth
finish.
1-43.
Place Shifter Lever Assembly (71) in the neutral position and turn off Switch
(201).
1-44.
The above procedures are for instruction purposes and are not necessarily
correct for all cases. Drum condition determines the proper depth of cut, carriage
feed, and spindle RPM. As the operator gains experience with his machine, he will
efficiency and
be able to make the proper settings for maximum performance,
accuracy.
Machining Disc Brake Rotors. Rotate cross slide crank Handle (118) counter-
clockwise to position Tool Plate (128) away from arbor so sufficient clearance is
provided when mounting rotor.
1-46.
M o u n t rotor on Arbor using one of the methods that is described in Paragraph 1-21.
1-47.
Position Tool Plate (128) notch over rotor by rotating Handwheel (243), Handle
(118), and Graduated Dials (144) until the Tool Bit cutting tips are approximately 1/2"
past rust ridge on outside edge of rotor.
1-48.
Tighten Thumb Screw (101) to lock Apron (92).
1-49.
S e l e c t low spindle RPM for rough cut as described in Paragraph 1-24 through 1-30.
1-50.
Loosen the two Sot. Hd. Cap Screws (137) and retighten to a point where a
slight drag is felt when adjusting Graduated Dials (144). This drag is caused by the
Sot. Hd. Cap Screws (137) maintaining pressure against the Holders (133) and (132).
Always maintain this drag when adjusting Tool Bits for depth of cut. Rotate both Grad-
uated Dials (144) clockwise until Tool Bits contact rotor.
1-51.
Position Vibration Dampener Assembly (151) against rotor. Tighten Sot. Hd.
Cap Screws (137).
Rotate Handle (118) counterclockwise until rust ridge is removed.
1-52.
Rotate Handle (118) clockwise until Tool Bits have removed inner rust ridge.
1-53.
Then position Handle (118) in a vertical position. CAUTION: Be sure Vibration
Dampener Assembly (151) does not catch on edge of rotor when cranking in Tool Bits.
1-54.
L o o s e n S o t . H d . C a p S c r e w s ( 1 3 7 ) a n d r o t a t e b o t h G r a d u a t e d D i a l s ( 1 4 4 ) c l o c k-
w i s e 005" and retighten Sot. Hd. Cap Screws (137).
Mount Drive Unit Assembly by placing Drive Unit Mount (156) pin into Plate
1-55.
(112) r e c e p t a c l e .
I n s e r t C o r d a n d P l u g ( 1 7 2 ) i n t o g r o u n d e d R e c e p t a c l e ( 2 0 6 ) i n b a c k o f C a b i n e t (195).
1-56.
1-57.
Switch on Drive Unit at Switch (173).
1-58.
Place Feed Control Handle in the middle of the Rough Cut Range (188). See
locking instructions on end of Feed Control Handle Knob. Swing Drive Unit clockwise
until Coupling (183) contacts Handle (118). When the Coupling (183) notch aligns and
connects with Handle (118), pull the Feed Control Handle to the neutral position. P l a c e
latch hook over Spring Pin (114) and secure latch.
1-59.
Place Feed Control Handle in middle of the Rough Cut Range (188).
1-60.
When Tool Bits leave rotor, pull Feed Control Handle to the neutral position and
s w i t c h o f f lathe at Switch (201).
Disengage latch from Spring Pin (114) and swing Drive Unit counterclockwise.
1-61.
1-62.
Deactivate Vibration Dampener Assembly (151).
1-63.
I f rotor braking surface is not cleaned up, repeat steps 1-54 through 1-62.
1-64.
Rotate Handle (118) to position Tool Bits at beginning of previous cut and loosen
S o c k e t Head Cap Screws (137).
1-65.
Place Vibration Dampener Assembly (151) against rotor.
