IBM 1402 Reference Manual page 21

c. Set timer index to 315", and tighten timer ad-
justment set screws.
4. Retime PCCB's.
a. Loosen PCCB pulley set screws.
b. Set timer index to make time of PCCB 4 (wir-
ing diagram).
c. Turn PCCB unit in normal direction of rota-
tion until PCCB 4 makes, and then tighten
PCCB pulley set screws.
TIMER INDEX BELT REPLACEMENT
1. Loosen timer index mounting screws (3) if more
clearance is needed in order to replace belt.
2. Install belt and adjust tension. Refer to Timing
Belt Adjustment. If base screws were removed,
pull timer unit to left and tighten mounting
screws.
3. Time timer index.
a. Loosen index pulley set screw (See Figure
3-15 ).
b. Set punch unit to 0" and depress geneva pin.
c. Set index to 0" and tighten pulley set screw.
PCCB DRIVE BELT REPLACEMENT
1. Install new belt and (if necessary) adjust by
loosening PCCB unit mounting bolts.
Be I t Name and Belts or Units
Reference Number
To Be Removed
(1 ) Main Drive Belt
(2) Drive Motor Belt
CR Idler Belt (3)
(3) CR Idler Belt
.. Timer Index
(4) Timer Index Belt .. Timer Index
(5) PCCB Belt
(6) Idler Belt PCCB Belt (5)
Belt to Transport Assembly
(7) PACB Belt PACB Unit
(8) Second Stepped Feed
Roll Belt
(9) PlCB Belt
(10) Punch Unit Drive Belt
(11 )
First Stepped Feed
;'ii,'
Main Drive8elt (1)
Roll Dri ve Belt
Punch Clutch Magnet
Bracket Assembly
"
'iC'
2. Time PCCB's.
a. Loosen PCCB adjusting set screws on drive
pulley.
b. Set timer index to make time of PCCB 4 (wir-
ing diagram), and turn PCCB unit in the
normal operating direction until PCCB 4
makes.
c. Tighten set screws.
IDLER BELT REPLACEMENT
1. Remove PCCB drive belt and transport drive belt.
2. Install new belt and tighten with idler pulley.
Refer to Timing Belt Adjustments.
3. Replace transport drive belt (no timing required)
and PCCB drive belt.
4. Retime timer index. Refer to Drive Motor Belt
Replacement, Steps 4 and 5.
5. Time PCCB's. Refer to PGGB Drive Belt Replace-
ment, Steps 2 and 3.
PACB DRIVE BELT REPLACEMENT
1. Remove PACB unit from machine (three screws).
2. Mark two white nylon gears, and remove gear on
belt pulley shaft.
3. Install new belt, and reinstall white nylon gear.
Be sure timing marks are rematched.
NOTE:
PACB shafts have two collars; each has
Units to be Retimed After
Belt Replacement
Punch Clutch, C7eneva
Timer Index, PCCB Unit
Timer Index, PCCB Unit
Timer Index
PCCB Unit
Timer Index, PCCB Unit
PACB Unit
i
Second Stepped
Feed Roll
PLCB Unit
',,'
Punch Unit
"
First Stepped Feed Roll
.. If there .is sufficient belt replacement clearance, this unit does not have
to be rimoved.
3-16, Punch Drive Belt Replacement Chart