- 47-
(B-138)
BAIL CAM UNIT FRICTION CWTCH
TOR�UE
(Figure
70)
Remove
the function bail
s
pr
ing
arrl hold
the printing bail
Pay
from
its adjusting screw. With the
printer
running on a closed line, hook a
32
oz.
scale over the screw head on the cam unit
and
pull horizontal.l,y at right angles
to the main shaft. It should require
20
to
24
ozs. to move the cam OpPos ite to
its normal direction of rotation•
CAUTION:
To prevent the clutch
from engaging,
block the clutch throWQUt
leve r
in such
a
mann
er that
it
prevents the
engaging
or the clutch
members.
DASHPOT
VENT SCREW ADJUSTMENT
.
The carriage should return from it s right stop
to
its lett stop with··
out bouncing and
with
minimwu
shock
when
the carriage return lock bar is hel4
in its latched position.
Adjust by
means
of the c1aahpot vent
screw
and
lock
�ut.
(See Figure
60
for location of parts.)
KEIBOARD UNIT
LOCK LOOP
SPRING �
S
IO
N
(Figure
71)
Rotat e the transmitting cam cylind.er untU
the
lock loop roller
is
resting on
the
low
part. of
i
t
s cam.
Hook
an
S
oz.
scale in the lock loop
spring
hole
and
pull
in
line
with the spring. It should require
4
to
;
ozs. to
start the lock loop
moving.
LOOKING LEVER SHAFT BRACKET ADJUST1�Nr
(Figure
71)
With
the locking levers
in
the spacing
po
s
i
t
i
o
n
arri t
h
e contact
levers on the high part of their cams, there should be some clearance, not more
than
.OlO",
'between the contact levers and the locking levers when the locking
levers
are
pressed
downward
by
hand to
make
this
clearance
a
minil!l.un.
Also,
the locking levers Should travel equally on either side of
the
lock loop blade
when
th
e
UNSHIFT
and
BLANK
keys are
al
t e
r
n
a
t
e
�
depressed.
To
a
dj
u
s
t
,
add
or
remove
shims between the locking lever shaft bracket
and
the
keyboard
c
a
stin
g
to meet the first requirement
and , be
fo
re
tightening the bracket mounting
screws, position the bracket laterally to meet the second
requirement.
TRANMTTIID CONTACTS GAP ADJUST14ENT
(F igure
71)
With
�
contact lever on the
high
part of its cam, the contact
gap
sh
ou
l
d
be *.020"
to
.025"·
*
For start-stop contacts, the
gap
should be
.015"
to
.02511•
&nd
the shorter contact
sp
r
in
g
s
to
o
btai
n
this clearance.
CONTACT SPRING
FRESSURE
(Figure
72)
W
i
th
any
co
n
t
act
lever on the low
part
of its cam,
it should require
a
pressure of
4-1/2
to
5-1/2
ozs.
to
open
th
e
contact
when
the push end of
an
8
oz. scale
i s
applied to the contact spring
just
above the contact point.
To
adjust,
bend
the longer contact springs. Recheck the contact
gap
adjustment.
