Hardinge SUPER-PRECISION HC - Page 9

Fi gure 14- Feed Rate AdJusting Screw
Cylinder Housing Disassembly
1. Disconnect air pressure at control unit.
Remove seven screws "K " , Figure 13, and remove
cover "L ". DO NOT REMOVE HOSE CONNECTORS
"M", Figure 15, unless absolutely necessary as they
are extremely tight to prevent air leakage and
removal is most difficult.
2. Remove 0-rings "N", " O ", and " P ", Figure 16 .
3. Remove piston " Q ", Figure 17, cylinder liner
"R" and two u- cups "S".
4. Remove two screws ''T ", Fi gure 16, and two
screws " U ".
5. Using open end wrench, unscrew piston rod
" V ", Figure 18, from tool post slide "W" and remove
cylinder housing "X ".
6. Remove nut "Y" , Figure 16, washer " Z ", Figure
19, piston rod " A ", piston plate " B ". Remove 0-ring
" C" , Figure 20, piston body " D" , seal " E" and two
0-rings " F". Remove cylinder liner " G ".
7. If necessary , remove 0-ring " H" , Figure 21 .
Cylinder Housing Reassembly
NOTE: Lubricate 0-rings, seals and cylinder walls
with Mobil Velocite No . 6 or equivalent during reas-
sembly .
1. Replace 0-ring "H", Figure 21.
2. Replace cylinder liner " G" , Figure 20, (cham -
fered side down) .
3. Replace seal " E" and two 0-rings " F" on
piston body " D ". Replace pi ston body.
4. Replace piston rod "A", Figure 19, 0-ring " C",
piston plate "B", washer "Z" and nut " Y".
5. Replace cylinder housing "X " , Figure 18, and
using open end wrench, thread piston rod "V", Fig-
ure 18 , into tool post slide " W".
6. Replace two screws " T", Figure 16, and two
Screws "U" . NOTE: Screws "T" are 1/e" longer than
screws "U".
7. Replace two u-cups " S" , Figure 17, on piston
"Q". Replace cylinder liner "R" and piston " Q" .
8. Replace 0-rings "N", "O", and "P", Figure 16 .
7
9. Replace cover "L", Figure 13 , and seven
screws ''K''.
10. Connect air pressure at control unit.
Figure 15 - Sl ide Tr avel Adjusting Screw Remo val
Figure 16- Cyl i nder Hous i ng w ith Cover Removed
CYCLE STOP MICRO SWITCH
REPLACEMENT
1. Disconnect air line at control unit and turn dis-
connect switch on main control case to " Off " .
2. Remove two screws " T ". Figure 16, and two
screws " U" .
NOTE: Screws "T" are 1/e " longer than screws " U" .
3. Using open end wrench, unscrew piston rod
"V", Figure 18, from tool post slide ''W " and remove
cylinder housing assembly " X" .