630D
HEAD q
TOP
CLAMP
PLATE
ALLEN-
HEAD
RETAINING
SCREWS
3ALANCE WEIGHT
ALLEN-HEAD CONE
POINTED
SET
SCREW
(4)
:aJ""'h"---.."
PROTECTiVE-~~~=~;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:;=c:::;::c~~~~~
PAD
HEAD 1
SCALE
ASSEMSL
Y-==3~O<~~;~;;~§~~3:~f:~~
HEAD 2
PROTECTiVE
PAD
HEAD 3
BOTTOM CLAMP
PLATE
ALLEN-
HEAD
RETAINING
SCREWS
Figure 6-44. Heads Installed
on
Positioner Carriage
(200
tpi)
(10)
Loosen the top pair and bottom pair of clamp plate Allen
head
retaining screws
from the clamp plates. Remove the clamp plates, screws,
and
spacers from the
carriage.
(11)
Determine that spacers between each pair of heads remain
on
screw shanks
when each clamp plate is removed from carriage; if not, individually remove
each spacer from carriage area before proceeding further.
(12)
Remove the heads
in
the following sequence:
head
0 (top), head 1 (second),
head
2 (third),
and
head
3 (bottom).
CAUTION
EXERT
EVERY
PRECAUTION
TO
PREVENT DAMAGE
TO
THE
GIMBLE
SPRING
AND
THE
CERAMIC SLIDER
WHILE REMOVING AND HANDLING HEADS.
•
Apply to the
head
end of the support arm sufficient pressure with thumb and
forefinger to separate the body of the support arm from the ramp. Push the
head
arm approximately 3lB-inch straight forward into the disk cavity
by
applying
pressure to the die cast positioning arm while holding positioning arm flat
against carriage mounting surface until the arm is free of carriage slots. Again,
use extreme caution not to
allow the gimble spring or the ceramic slider to
come in contact with any other surrounding part .
• When a
head
is free, place
it
upon a lint-free wipe in the clean area with the
ceramic slider facing up.
• Remove the other heads
in
succession observing equal precautions for each
head.
6.22.2 HEAD
INSTALLATION
PROCEDURE
Installation of the heads after cleaning
or
when replacing a damaged head is accomplished
as
follows.
(1)
If required, perform the necessary Steps
(1)
through
(5)
of
Paragraph 6.22.1.
6-84
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