IBM 01 Maintenance Manual page 41

REFERENCE MANUAL MODEL 01
SLOW OR WEAK CARRIAGE RETURN. Causes are the
following:
1. Oily clutch disk
2. Weak spider spring
3. Micro-switch not making contact
4. Excessive clutch plate clearance
5. Loose power frame screws
6. Loose clutch operating lever assembly mounting screws
7. Gummy grease in worm gear housing
. 8. Shiny clutch disk '
9. Clutch pulley rubbing the black metal base
10. Weak motor
11. Wrong motor
12. Wrong governor
CLUTCH TOGGLE FAILING TO LOCK. Causes are the
fpllowing:
1. Worn or binding toggle joints
2. Broken clutch operating lever assembly screws
3. Backspace interlock choking off on backspace pawl
4. Cam clearance excessive
5. TKO tip too high
6. TKO link too short
7. Loose margin rack
8. Excessive escapement pawl clearance
9. Excessive clutch plate clearance
10. Tab lever not in rest position
CARRIAGE RETURNING TOO HARD. Causes are the fol-
lowing:
1. Clutch plate clearance too close
2. Spider spring adjusted too tight
3. Dirty or gummy clutch disk
CLUTCH TOGGLE FAILING TO UNLOCK. Causes are the
<ollowing:
1. TKO link too long
2. Hairpin spring on TKO lever too weak
3. Side knockout· lever not under toggle operating lever
4. Binding toggle joints
5. Clutch plate clearance small and spider spring tight
6. Side KO lever too far from the link to carriage return
cam
7. Weak motor or low line voltage
8. An open micro-switch
9. Gummy grease in worm gear housing
10. Loose stud in side KO lever
11. DC motor on AC
LINE SPACE FAILURE. Causes are the following:
1. Slow repeat line space action. (Wind up clutch pulley
spring all the way and attach tape.)
2. Slippage between platen ratchet and platen ratchet
driver
3. Lower index pawl stop improperly adjusted
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