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4.6.30 Ribbon Drive Clutch
I
DANGER
A spring within the clutch mechanism can
fly out when disassembling the clutch. Hold
the bracket toward the floor and release the
spring tension slowly.
Removal
1.
Remove the printer covers (4.6.1) steps 1
through
3.
2.
3.
4.
5.
6.
7.
8.
Remove the ribbon (4.6.28) and type
belt (4.6.13).
Remove the type belt drive pulley assem-
bly (4.6.14).
Remove the ribbon drive assembly
(4.6.29).
Remove the screw·
a
from the drive
shaft.
Remove three rollers
II ,
the gear
Ii ,
and the washer beneath the gear.
A long spring is compressed between the
lever and the lower bearing assembly.
While grasping the assembly tightly to
keep the spring from flying out, remove
three screws
D
and slowly remove the
bearing.
Tip the ribbon drive unit sideways to
keep the units within the clutch from
falling out, and remove the C-clip
13
and pivot shaft
D.
9.
Remove the spacer
m,
clutch face
II ,
drive shaft
II,
and the drive pulley and
belt
m .
Replacement
1.
Install the bottom half of the clutch onto
the square part of the shaft.
2.
3.
4.
5.
Install the ribbon drive belt onto the new
drive pulley and place them in the clutch
housing.
Insert the drive shaft and bottom half of
the clutch up from the bottom and through
the drive pulley, washer and bearing.
Place the clutch spacer on the lever
m
and install the lever with the pin and
C-c1ip.
Fit the bottom of the spring onto the
brass bushing in the plate (the top of the
spring presses into the pivot arm). Install
the plate with three screws.
- - - - - - - -
D
6.
7.
8.
9.
Install the washer, gear, and three drive
rolls, and tighten the screw while holding
onto the drive rolls.
Note: Screw
m
must be tight, or drive
rolls may slip on drive shaft.
Check for proper reassembly by lifting on
the lever
m
and turning the drive pulley.
The drive pulley should turn freely. When
the lever is released, the clutch should
engage when the drive gear is turned.
Install the ribbon drive assembly (4.6.29)
and perform the ribbon drive belt tension
adjustment (4.6.31).
Install the type belt pulley assembly, type
belt, and ribbon.
10.
Adjust the ribbon solenoid (4.6.32).
11 .
I nstall the covers.
Belt Printer
285 Ipm
4-127
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