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Figure 11.
Standard
Tape Dimensions
5.0 MAINTENANCE
5.1 Lubrication
(See
Figure 12)
After
every
500 hours
of
operation,
lubricate
the following:
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!1
2
(a)
Escapement Clutch
Assemblies. Lubricate both sides of each escapement clutch
assembly between the
friction washers
and
the spur gear
with
silicone oil, 350 centipoises.
(b)
Shaft
Bearings. Lubricate
shaft and idler gear
bearings, using rust
and
oxidation
inhibited oil, SAE
20
grade.
If
the
reader
is
equipped
with tape
reeling
equipment, the
reel drive
mechanism
bearings should also
be lubricated with the
same
oil.
(c)
Escapement
Assembly. Clean, and
then
lubricate each escapement armature
ful-
crum
with
a light
film
of
Tally
pivot grease A.
The
adjacent armature pole
face must be wiped
clean of
all lubricant.
(d) Drive
Motor
.
Lubricate drive motor bearings using
rust and oxidation
inhibited oil,
SAE 20 grade
.
5.2 Read Head Service
5.2.1 Trouble-Shooting Reading Errors
If erratic readings are detected,
examine
the contacts for dirt
or
pitting.
If
dirty,
clean as outlined in Section 5.2.2. If pitted,
they should
be replaced and
adjusted
per Section
5.2.3. Check the star wheels and star wheel levers for
free
movement, and
clean
if
necessary.
Check switch timing and
contact
pressure per
Section
5.2.3.
5.2.2 Cleaning Contacts
Access to the read head
contacts
may be gained by removing one
screw
on the
front
of
the read head
cover
and withdrawing
the cover away
from the front panel.
If
the con-
tacts are dirty
or
corroded, they
should
be cleaned with methyl
ethyl
ketone. Use a fine brush
or
pipe cleaner as the applicator, and dry with
compressed
air. Use caution not to bend the
small movable
contact
wires with the brush or air blast.
SCATTL[
Page
10
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