i;~
T;i~'ger
Knock-Off
Eccentric
lATE
STYLE
Trigger Disengages
From
Torque
Bar
When
Correct Pawl
Clearance
Exists
Trigger
Guide
EARLY
STYLE
FIGURE
106.
Escapement Trigger
Guide
Adjustmel)t
9.
Trigger Lever Upstop - With
the
machine
at
rest and a
clearance
of
.007"
to
.010"
existing between
the
trig-
ger and
the
lug on
the
torque
bar,
adjust
the
trigger
lev-
er
upstop
so
that
it has a
clearance
of
.001"
to
.005"
with
the
tri gger lever (Fi
g.
107).
/
/
I
\
"-
............
/
./'
FIGURE
1.07. Trigger Lever Upstop
The
trigger
upstop prevents
the
trigger
lever
from
bounc-
ing as
it
returns
to
its rest position.
MAINSPRING
AND
CORDS
I •
Gear
Mesh -
The
proper
gear
mesh between
the
escape-
ment cord
drum
and
the
carrier
return pinion involves
two adjustments.
Both
must be considered
together.
a.
Adjust
the
operational shaft
laterally
so
that
the
crown surfaces
of
the
escapement cord drum
gear
and
the
carrier
return pinion
are
even (Fig. 108).
Crown
Surfaces Even
2-34
Carrier Return
Pinion
Bearing
Adjust
Operational
Shaft
End
Play
By
Shift Arbor
And
Operational
Shaft
Collar
FIGURE
108.
Gear
Mesh
and
Operational
Shaft Adjustment
The
position is
controlled
by a
collar
set
screwed to
the
shaft
and
the
shift
clutch
ratchet.
Be
sure
to
maintain
.002"
to
.004"
end
play
in
the
operational
.
shaft.
b.
The
escapement
cord
drum
gear
should
be
adjusted
fCiVvuid
Oi
back
to
obtain .002" to .004" backiash
at
the
point
of
tightest mesh with
the
carrier
return
pinion.
Be
sure
that
no binds exist throughout
the
trave I
of
the
carri
er.
CAUTION: The mainspring tension should be
RE-
LAXED
before
the
escapement cord
drum
gear
is
loosened. The cord tension should also be relaxed
by removing
the
cord
from
the
pulley
on
the
cord
tension
arm.
Be
sure
that
no end
play
exists in
the
escapement shaft before attempting
the
gear
mesh
adjustment.
NOTE:
No
attempt
should be made
tel
adjust
the
cord tension with
the
escapement cord
drum
because
the
drum
is
set-screwed
to
a
flat
spot on
the
escape-
ment
shaft.
2.
Tab
Governor Pinion - Adjust
the tab
governor pinion
to
have
.002"
to
.004"
backlash
at
the
point
of
closest
mesh
with
the
escapement cord drum
gear.
Adjust
the
pinion by moving both
the tab
governor hub and
collar
located on
each
side
of
the
pinion.
The
pinion should
have a minimum
of
end
play
yet
still rotate
freely
(Fig.
109).
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