Head Load Pad Replacement Illustration - Control Data Corporation BR8 SERIES Hardware Maintenance Manual

HEAD LOAD ARM
AC CONNECTOR
STEPPER MOTOR SHAFT (AFT END)
~---
\.~5~a
_)
CARRIAGE
ASSEMBLY
PAD HOLDER ASSEMBLY
\ 4 \ -
CLM\PING
~.,...-
SCREW
....
"".
___ - - - - - + I f - - -
CARRIAGE ASSEMBLY
~----H--CARRIAGE STOP
DRIVE MOTOR
STEPPER MOTOR
NOTE
IMPORTANT: Refer to CAUTION
in Section 6. 7.4 before handling
head-load arm.
Figure 6-13. Head Load Pad Replacement Illustration
d. If unable to insert 0.060 inch
(1.
52mm) wire feeler gauge, continue to gently bend tang
upward until feeler gauge can be inserted.
e. Next, attempt to insert a 0.062 in
(1.
58mm) wire feeler gauge between the under-
side of the clapper and the coil.
f. If this gauge can L~ inserted, bend tang down until 0.062 inch (1. 58mm) feeler gauge
will not insert in gap between clapper and coil core.
g. Insert a 0.058 in (1.47mm) wire feeler gauge in gap between underside of clapper
and coil core.
h. If 0.058 in (1. 47mm) feeler gauge will not fit, bend tang up slightly.
i. Continue checking with the .(). 062 inch (1. 58mm) wire gauge feeler and O. 058 inch
(1. 47nlm) wire gauge until the following condition is achieved:
1. 0.062 inch (1. 58mm) feeler gauge will not pass between tang and clapper;
2. 0.058 inch
(1.
47mm) feeler gauge passes freely between tang and clapper.
j. Check spring adjustment by gently pressing down on clapper until the 0.060 inch
(1.
52mm) ±O. 002 in (0. 051mm) gap is closed.
k. Allow clapper to rise slowly and release.
1.
Clapper should be in contact with the tang.
In.
If not, bend the lower tang B, Figure 6-10; downward gently.
n. Recheck that the clapper rise and perform step m until clapper and tang make
contact.
o. Check bail adjustment per paragraph 6. 6. 6.
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