Tab

SYMPTOM

POSSIBLE CAUSE

REMEDY

REMARKS

Tab set/clear

keybutton will

not set or clear

tab stops.

1. Tab set/clear keybutton

link broken, binding or

damaged (86-23).

Repair or replace

2. Tab set/clear bracket

damaged or broken(87-24)

Repair or replace

3. Tab set/clear gang clear

bracket maladjusted

(73-45).

Adjust gang clear bracket (73-45)

to set and clear tab stops without

excessive noise.

See "Carrier stops at wrong tab position, cause 8".

4. Position of tab rack -

left to right.

Adjust tab rack left or right(14-10)

Adjustment:

1. Tab to a set tab stop.

2. Backspace one position.

3. Hold carrier with right hand.

4. Slowly depress tab keybutton,

while observing the tab lever

(9-6) move towards the rear.

Adjust tab rack, with adjusting

nut (88-26), so tab lever missef

tab stop by .010".

5. Tab set/clear bellcrank

loose or broken (87-28)

Adjustment:

1. Loosen tab set/clear bellcrank

(87-28).

2. With machine power off, de-

press tab keybutton and latch

out tab lever (9-6).

3. Rotate tab rack radially

and position between escape

ment bracket extension (89-29)

and tab lever (9-6).

Carrier does not

move when tab is

operated.

1. Tab keybutton binding on

cover.

Reposition keybutton or adjust

machine within covers.

Adjust machine within covers

with foot brackets (65-30).

2. Tab set/clear keybutton

binding on cover.

Same as Remedy 1.

3. Cords off pulleys

Replace cords on pulleys and

check cord tension pulley.

See "Special section " on cord tension pulley adjustment.

4. Carrier binding on dust

shield (12-1).

Adjust shields to remove binds.

5. Velocity cable caught on

pulley (70-:40).

Adjust velocity cable to just

contact the left inside of machine

when carrier is at extreme left

side of machine.

6. Tab keylever link binding

or broken (86-23)

Replace or repair link.

7. Tab torque bar link off or

damaged (90-30).

Replace or repair.

8. Too much lost motion

between tab torque bar

(91-31) and tab trigger

(91-32).

Adjust tab torque bar clevis(90-33)

for minimum clearance between

tab torque bar (91-31) and tab

trigger (91-32).

9. Tab trigger broken or

damaged (91-32)

Replace

10. Tab overthrow stop

(32-34) blocking tab

lever (9-6).

Adjust tab overthrow stop (32-34).

Adjustment:

1. Turn machine off.

2. Depress tab keybutton and latch

out tab lever (9-6).

3. Adjust tab overthrow stop

(32-34) for .005" clearance

between tab trigger (32-35)

and overthrow stop (32-34).

11. Tab lever broken (32-36)

Replace

Check tab lever spring (32-36).

12. Worn or maladjusted

escapement (31-32) and

tab pinion gears (31-30)

Replace or adjust

Loosen bristol screws on tab

pinion gear (31-30) and adjust

gear back and forth for  .005"

backlash.

Machine will tab

only while tab

keybutton is depressed.

1. Tab lever not latching

out.

1. Check tab latch (92-33) and

motion.

Adjust minimum clearance be

tween tab torque bar (91-31) and

tab trigger (91-32) with tab torque

bar adjusting link (90-30).

2. Tab torque bar (91-31) not

transferring enough motion

to tab trigger (9-6).

2. Tab overthrow stop (9-4)

not allowing tab lever to

move far enough to rear

to be latched out.

Adjust tab overthrow stop (32-34)

Adjustment:

1. Turn machine off.

2. Depress tab keybutton and latch

out tab lever (9-6).

3. Adjust tab overthrow stop(32-34

for  .005" clearance between

tab trigger (32-35) and over

throw stop (32-34).

Carrier hesitates

while tabbing

1. Poor lubrication

Lubricate machine completely

Be sure to lubricate print shaft

wipers, escapement rack and

cord pulleys.

2. Cords off pulleys.

Replace cords and check cord

tension pulley.

For adjustment of cord tension

pulley, "See special section".

3. Mainspring tension(17-1)

Mainspring should be wound clock-

wise approximately 6 turns.

Check for broken mainspring.

4. Binds in tab pinion and

escapement gear.

Loosen tab pinion gear (31-30) and

adjust back and forth for minimum

backlash - no binds.

5. Tab torque bar (91-31)

binding against escape

ment bracket (89-30).

Loosen 4 screws holding escape

ment bracket (89-30) and adjust

bracket for clearance between tab

torque bar (91-31) and escapement

bracket (89-30).

Carrier stops at

wrong tab posi

tion

1. Tab keybutton binding on

cover.

Reposition keybutton or adjust

machine within covers.

Loosen machine foot brackets

.(65-30) to adjust machine.

2. Tab set/clear keybutton

binding on cover.

Reposition keybutton or adjust

machine within covers.

Loosen machine foot brackets

.(65-30) to adjust machine.

3. Tab stops are not being

cleared completely.

Check and adjust tab gang clear

bracket.

See "Machine noisy when gang clearing set tab stops. "

4. Carrier binding on dust

cover (12-1) or card

holder.

Check and adjust card holder and

dust shield to prevent binds.

5. Cords off pulleys

Replace cords on pulleys and

check cord tension pulley.

for cord tension pulley adjustment

See "Special section".

6. Check for binds in rear

or front carrier supports

Check and adjust rear shoe (32-33)

to eliminate binds, lubricate print

shaft wipers (41-27).

7. Too much escapement

pawl clearance.

Form upper extension on tab lever

latch (92-33) to adjust for pawl

clearance. Adjust for minimum

pawl clearance without pawl

dragging on escapement rack.

Too much pawl clearance could

cause the carrier to go one space

too far.

8. Check position of tab

set/clear bracket.

Selectric II Dual pitch

typewriter

The selectric II tab rack

stops are not evenly

spaced.

Adjust gang clear bracket (92-34)

to set proper tab stops.

1. Locate the two tab stops that

are closer together. (92-36)

2. Place switch pitch lever in 10

pitch position.

3. Adjust gang clear bracket to

set the two tab stops together.

4. Change machine to 12 pitch

position.

5. Using same two tab stops, adjust

gang clear bracket to set

the two tab stops individually.

Perform the adjustments until

both the 10 and 12 pitch conditions

are correct.

9. Check tab latch for binds

(92-33). Check tab latch

spring also.

Remove binds and check tab latch

spring.

10. Silicone tab rack

Replace with a new friction tab

rack.

Friction rack may require the

long nose gang clear bracket.

11. Check position of tab

rack - left and right.

See "Tab set/clear keybutton will not set or clear tab stops, cause 4".

12. Poor lubrication

Lubricate machine completely.

Be sure to lubricate print shaft,

pulleys and escapement rack.

13. Not enough tab lever

bite on tab stop.

Loosen screw on head of tab lever

(9-6) and adjust tab lever pawl

for .040" clearance between tab

lever pawl and a set tab stop.

14. Oil wiper caps, on side

of carrier, binding on

print shaft. (41-27).

Loosen and center print shaft

wiper caps, to prevent binds.

15. Check governor or tab

pinion spring - may have bad loop.

Replace

Governor spring is same as tab

pinion spring (31-30). May be

binding due to dirt - clean with

cleaning solution.

Tab set/clear

keybutton sets

wrong tab stops

1. Tab gang clear bracket

maladjusted (73-45).

See "Carrier stops at wrong tab position, cause 8".

Most likely to occur on Selectric

II typewriters.

Machine noisy

when gang clearing set tab stops.

1. Tab gang clear bracket

(73-45) (Front to rear

adjustment)

Adjust tab gang clear bracket,

front to rear, to clear set tab

stops without excessive noise.

2. Tab gang clear bracket

nose. (up and down ad

justment)

Form nose up to prevent dragging

on rack.

Tab stops set or

clear themselves

Silicone tab rack

Replace silicone grease tab rack

with friction tab rack.

After replacing tab rack, go to

"Tab set/clear keybutton will not

set or clear tab stops, cause 5

and cause 4".