(2)
Prior
to
installing heads, inspect carriage and the surrounding area for any foreign
material that could contaminate heads
or
interfere with installation. Clean head
mounting area with 91-percent isopropyl a/cohol.
NOTE
Use
only
91-percent isopropyl alcohol to clean disks and
heads. Use
of
any other type
of
cleaner
or
solvent, such as
carbon tetrachloride
or
trichlorethylene may result in
damage.
Do
not
use contaminated alcohol which could
contain any form
of
residue.
Examine the carriage
slots
into which the supporting arm
of
the head is placed
for
any nicks or burrs that would obstruct installation
or
alignment.
(3)
Examine the ceramic slider
of
each head
for
cleanliness. Also inspect gimble
spring and slider pivot for proper alignment. Refer
to
Figure 6-43.
(4) Prepare
two
lint-free wipe pads, approximately 1-inch square and 1/S-inch thick;
these pads
will
be
used
to
separate each pair
of
heads
to
prevent possible damage
to the ceramic slider during installation.
(5)
Note that there are two V-shaped indentations on the side
of
the die-cast support
arm. Fore and
aft
head alignment
of
several thousands
of
an
inch can be made
when the painted screws in the
clamp plate engage with the V
slots
in the support
arm. (Figure 6-44 illustrates the support arm used on both the
100
tpi
and
200
tpi
models.)
6.22.2.1 Installation
of
Head-to-Carriage Slots
(1)
Locate the threaded holes on the carriage used for the clamp plate(s) retaining
screws.
CAUTION
CARRIAGE
MUST
BE FULL Y RETRACTED
AND
REMAIN
RETRACTED WHILE INSTALLING HEAD ASSEMBLIES.
NOTE
When
installing heads,
it
is recommended that the bottom
head [the lowest] be instal/ed first and then progress up to
the top head.
CAUTION
CARRIAGE
MUST
NOT
BE
MOVED
FROM
THE
FULLY
RETRACTED POSITION UNTIL
ALL
HEADS
ARE
SECURED
IN
PLACE
BY
THE
CLAMP
PLA
TE.
(2)
Carefully guide the bottom head into place with the ceramic slider facing upward
and insert the die-cast body
of
the support arm into the carriage
slots
part
of
the
way.
(3)
Visually position the support arm
Vs
to be approximately on center with the two
retainer
clamp screw holes.
NOTE
Improper horizontal positioning
of
the head into the
carriage slot(s) may result in improper loading
of
the
head. Make sure that the end-protruding tab
of
the head
support arm is inserted into the carriage
slot
so that the
head-to-carriage distance shown in Figure
6-45 is
obtained. Ensure that the head support arm does
not
contact the loading/unloading ramp during a Restore
operation.
A-85
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