Section 3. Servicing Procedures; Read Feed; Timing Belts; Clutched Feed Roll Drive Belt - IBM 1402 Reference Manual

Read Feed
Timing Belts
All read feed belts, except the clutched feed roll drive
belt, captive on some machines, are easily replaced
and require no timing.
ADJUSTMENT
Belt, pulley, bearing, and shaft life will be increased
if correct belt tension is maintained. The one pound
(450 grams) pressure indicated in Figure 3-1 can be
measured by using gram gage 450459 and X10 blade.
When using the gram gage, the pointer must be as
Section 3. Servicing Procedures
near the midpoint of belt width as possible.
Clutched Feed Roll Drive Belt
This procedure is necessary only if the belt is captive.
REPLACEMENT
1. Remove solar cell unit.
a. Remove plastic cover, disk mounting screw,
and disk.
b. Loosen three set screws in solar cell mounting
plate. These screws retain the mounting plate
to three spacer studs mounted in machine side
frame. Carefully remove solar cell unit, and
allow it to swing out of working area.
FILE FEED DRIVE
3"
111
~±~
CONTACT
ROLL
MODEL 2 ONLY
1 LB.
DRIVER
1 LB.
CONTACT
ROLL
Figure 3-1. Reader Timing Belt
Adjustmeri~
111 1"
- ± -
8 32
DRIVER
~ 1"
,"
- ± -
4 32
JOGGLER
DRIVE
3
If
1"
16±'32
3-1