Hardinge SUPER-PRECISION HC - Page 11

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Figure 22 - Cycle Stop Micro Switch
4. Remove cable grip "E", Figure 22, and pull
micro switch wires from chasing head.
5. Support chasing head by hand to prevent it
from dropping down , and loosen two bolts "H ", Fig-
ure 23. Remove head from chasing bar. NOTE: TWO
PEOPLE ARE SUGGESTED FOR STEP 5).
6. Loosen two screws " J", Figure 24, and remove
dial nut "K". Remove dial assembly "L" .
7. Remove key "M", Figure 25.
8. Remove four screws "N", Figure 25, and
remove cover " O ". Remove plunger pin " P ", Figure
26 and spring "Q " .
9. To Disassemble cover "O ":
(a) Remove pawl " A", Figure 27, and O-ring
"B'', if necessary.
(b) Remove screw "C", block " D", spring "E"
and plunger release bar " F".
(c) Remove lock screw " G", Figure 28 and
l oosen stop screw under scr ew "G".
(d) Remove lock plung er " H ", Figur e 27.
(e) Remove l ock screw " J ", Figure 29, and
remove set screw " K ", spring "L" and pin
"M".
(f) To remove pawl block "N", Figure 27,
remove two screws "O", Figure 30, and
drive dowel pin "P" from cover.
(g) Ne e dle bearing "Q " and seal " R" are
press ed into cover.
10. Push down on pawl post " A" , Figure 31, and
remove pawl "B" from pin "C".
11 . Remove pawl post "A", Figure 32 , and remove
spring "D " and spacer "E " .
12 . Remov e nut "G", Figure 33. Re move spring r e-
tain e r "H", Figure 34, and re move spring "J" and
dial sleeve "K".
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F
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Figure 23- Clamping
Bracket
Bol ts for Chasing Head and Guide Bar
Figure 24 - Thread Depth Control Dial
Figure 25 - Cover for Chasing H ea d