Hardinge SUPER-PRECISION HC - Page 10

4. Remove two screws "B", Figure 22, and,
remove micro switch "A". Remove wires from micro
switch.
5. Connect wires to normally closed and common
terminals of new micro switch. Replace switch "A"
and two screws "8". Do not tighten screws.
6. Pull cycle start knob, set micro switch with ac-
tivator just touching plunger "C" and tighten screws
''B".
7. Turn disconnect switch on main control case to
"On ". When threading unit is lowered to operating
position a click will be heard from solenoid in
knockout housing with cycle start knob " Out" and
will not be heard with cycle start knob " In", if micro
switch "A" is operating properly . Turn large white
dial right-handed to retract cycle start knob.
8. Reassemble other components by reversing
steps 1, 2, and 3.
Figure 17 - Piston for F ee d Rate Adjusting Screw
Figure 18 - Piston Rod for Slid e Tr av el
8
Figure 19- Piston for Slide T ra vel Ad j usti ng Screw
Figure 20 - Cylinder Housing and Components
--
~ -- -- _ __,- -_ ..--- ,_ ___ _
Figure 21 - Cy lind er Hous ing
CHASING HEAD DISASSEMBLY
1. Support guide b ar bracket "F " , Fi gure 23 , by
ha nd a nd loo sen two bolts " G ". Remove guide bar
brack et.
2. Follow steps 1, 2, and 3 und er "Cyc le Stop
Mi cro Switch R ep l ace me nt" on pr e vious pag e.
3. Remove tw o screws "B ", Fig u re 22 , a nd
re move mi cro s witch "A" . Remov e w ires from micro
s wit ch. R emo ve O-ring seal for micro s witch.