Shift Cam Removal; Operational Shaft Removal; Operational Interposer Bracket Removal; Carrier Shoe Removal - IBM Selectric Maintenance Manual

SHIFT CAM REMOVAL
1. Turn the type head counterclockwise and remove the re-
laxed rotate tape from the shift-arm pulley and put it
around the tilt pulley.
2. Remove the lower-case armature spring (# 1, Figure 47).
3. Remove the cam-follower spring (#2, Figure 47).
4. loosen the setscrews and remove the cam follower arm
(#3, Figure 47).
5. Remove the shift-magnet assembly (#4, Figure 47).
6. Remove the three springs (#5, Figure 47).
7. Remove the interlock C-clip (#6, Figure 47).
8. Remove the detent (#7, Figure 47).
9. Remove the C-clip from the shaft and remove the ratchet
(#8, Figure 47).
10. Remove the shift-release arm (#10, Figure 47).
11. Remove the shift-clutch spring (behind the ratchet).
Note: Observe the spring position for replacement.
12.· Remove the shift arbor (#11, Figure 47).
Note: Do not rotate the shaft backward.
13. Remove the shift cam (#12, Figure 47).
14. The following adjustments should be checked after the
shift-cam is replaced.
a. All shift mechanism adjustments
b. Shift magnet. assembly
c. Upper and lower case typehead homing
*
Screw is hidden behind Rotate Arm
FIGURE 48. Operational Shaft Removal
OPERATIONAL SHAFT REMOVAL
1. Complete the Shift-Cam Removal.
2. Remove the two lugs and two screws from the bearing
mounting plate (#1, Figure 48) and slide the plate off.
3. Disconnect escapement link.
4. Work the operational shaft to the right until it clears
the cycle clutch pulley hub, then lift shaft out the top.
5. The following
adjustment~
should be checked after the
operational shaft is replaced.
a. All shift mechanism adjustments
b. Shift magnet assembly
c. Upper and lower case type head homing
d. Gear mesh
3-13
I
FIGURE 49. Operational Interposer Bracket Removal
OPERATIONAL INTERPOSER BRACKET REMOVAL
1. Complete the Shift-Cam' Removal.
2. Complete the Operational-Magnet Removal.
3. Complete the Operational-Shaft Removal.
4. Complete the Operational-latch-Bracket Removal.
5. Remove the six (two shown) mounting screws (#1, Figure
49).
6. Remove the C5 auxiliary cam follower.
7. Remove the key-lever pawl guides from the operational-
interposer bracket (not shown).
8. Work bracket assembly out through rear of machine.
9. The following adjustments should be checked after the
operational-interposer-bracket assembly is replaced:
a. All shi ft mechan i ca I ad justments
b. Shift magnet assembly
c. Upper and lower case type he ad homing
d. Gear mesh
e. Operational latch pivot pin eccentric
f. Escapement trigger guide
g. Mainspring tension
h. Keylever pawl to interposer clearance
i. Operational latch height
j. Backspace rack
k. Pawl clearance
I.
Clutch latch overthrow
m. Carrier return actuating arm
n. Multiplying control lever
CARRIER SHOE REMOVAL
1 .
Rem~ve
the two card-holder screws (#1, Figure 50).
2. Remove the two escapement-bracket screws (#2, Figure
50) .
FIGURE 50. Carrier Shoe Removal