Teletype 28 - 2.40 Typing Mechanism

SECTION 573-118-700TC
2. 40 Typing Mechanism
(A) ~US_HBAR OPERATING BLADE (Preliminary)
BELL CRANK
SPRING (5)
Requirement
Manually select LETTERS code combination (12345).
Rotate main shaft until function clutch trips. Hold no.
2 and 3 bellcranks against stop post. Operating blade
parallel to (not necessarily flush) top of no. 2 and 3
pushbar latching surfaces.
To Adjust
With its mou.nting screws friction tight, pry transfer
mounting br-acket all the way to right. Add or remove
shims under rear leg of operating blade. Place extra
shims on rear mounting screw between blade and
flat washer.
SHIMS
PUSHBAR OPERATING BLADE (Rear Leg)
J,. BELLCRANK
(Front View)
(C) BELLCRANK SPRINGS (5)
To Check
Select LETTERS code combination
(12345). Rotate main shaft until
function clutch trips.
Requirement
'-----Min 1 oz--- Max 3 oz
to start pushbar moving.
Note: Check all five springs.
NO. 2 PUSHBAR
NO. 1 PUSHBAR
NO. 4 PUSHBAR
NO. 5 PUSHBAR
LTRS PUSHBAR
FIGS PUSHBAR
NO. 3 PUSHBAR
PUSH BAR
(B) SHOULDER CLEARANCE
(1) Requirement
Manually select LETTERS code combination
{12345). Rotate main shaft until function
clutch trips. Manually seat pushbars in
detented position. In bar which is nearest
left edge of blade, take up play to left and
rear, and then release. Clearance between
bar and left edge of blade
,...------Min 0.015 inch---Max 0.030 inch
(2) Requirement
,-----Some clearance between right edge of blade
and pushbars when play in bars has been
taken up to right and released.
(3) Requirement
1-----With unit in stop position, some clearance
between right edge of blade and bars when
play in bars has been taken up to right and
released.
To Adjust
With mounting screws loosened, position
operating blade in elongated holes.
Tighten screws.
MOUNTING SCREWS
OPERATING •I -~----~-... ~
BLADE I -- :
Note: It may be necessary to refine this
1
l'-1 1 . U :::::::J adjustme~t after CENTERING CLEARANCE
(2.41) adJustment.
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