Centronics 101AL Technical Manual page 86

DRIVING MECHANISM
F. Timing Belts (HB-48, 49)
1. For forward clutch belt (HB-48), remove intermediate gear
for forward clutch (HB-30) by removing nut (HB-28) and
use procedure in para. D.5. through 7. for installation.
2. For reverse clutch belt (HB-49) removal, refer to procedure
in para. E.2.a. through 2.c.
G. Intermediate Shaft with Pulley (HB-80)
1. Remove intermediate shaft with pulley (HB-30) by removing
nut (HB-28) and washers (HB-29). Slide belt (HB-48) off
the pulley prior to removal.
2. Loosen pulley (HB-22) on intermediate shaft (HB-80) by
apseny"s two set-screws (HB-23). Slide off pulley belt
HB-48 ) .
3. Pull out pinned pulley and shaft (HB-80) toward front of
Php ea). This step will free pulley (HB-22) and felt washers
HB-24).
5.2.3.3 Adjustments
A. To Adjust Motor Pulley Drive (HB-92) and Motor Clutch Plate
(Part of Motor)
1. Torque of these slip clutches is 33.3 oz/in. through 97.2 oz/in.
Adjust by changing tension of spring (HB-93) with nuts (HB-112).
2. If compression of spring is increased too much speed of
carriage is accelerated, timing belt receives abnormal shock
and squeeking noises will come from forward and reverse
clutches.
Note
Make sure that there is no oil on
surfaces of motor clutches.
B. To Adjust Belt Tension (Timing Belt HB-48, 49)
Proper belt tension is obtained under the following condition:
When about 300 grams (10.6 oz.) pressure is applied to
upper half of belt, mid point between pulleys, belt
depression is about 3 to 4 mm (0.12 to 0.16-in.).
5-14