IBM 1402 Reference Manual page 22

a scribed line. The casting has two scribed lines
which will coincide with collar lines at 0° on
punch index (see Figure 3-17) .
4. Align shaft lines with scribe lines on casting, and
set punch index on 0°.
5. Slip the PACB belt over the punch pulley. If care
is taken, the PACB unit can be tightened and
both units will be in time. Refer to Timing Belt
Adjustments.
6.
If the PACB's are not in time, loosen PACB drive
pulley screws.
a. Align two scribed marks on PACB mounting
unit with collar scribed lines.
b. Set punch index to 0°, and depress geneva pin.
c. Tighten pulley screws.
SECOND STEPPED FEED ROLL DRIVE BELT REPLACEMENT
1. Loosen idler pulley. Install new belt and tighten
with idler pulley. Refer to Timing Belt Adjust-
ments.
2. For timing second stepped feed roll, refer to Feed
Rolls and Aligner Stations, Adjustments, Second
Stepped Feed Rolls, Steps 2 thru 7.
PLCB DRIVE BELT REPLACEMENT
1. Install belt.
2. Retime PLCB to timer by loosening PLCB shaft
pulley
clamp~ng scr~ws.
TIMING MARKS
' .
Figure 3-17. PACB Timing Marks
PUNCH UNIT DRIVE BELT REPLACEMENT
Do not remove geneva unit when punch unit drive
belt is being replaced.
1. Loosen idler pulley. Install belt and tighten belt
with idler pulley.
2. Retime punch by loosening locking screws on
punch unit drive pulley.
a. Set punch and timer index to 0°.
b. Depress geneva pin and tighten pulley lock
screws.
FIRST STEPPED FEED ROLL DRIVE BELT REPLACEMENT
1. Crank machine to 315' (until geneva pin de-
tents) .
2. Mark relationship of input idler pulley to punch
drive gear.
3. Mark relationships of main drive belt to input
idler pulley, geneva and main input pulley. Refer
to Figure 3-18.
4. Loosen first stepped .feed roll idler.
5. Remove locating. pins. in punch clutch magnet
f\' '
bracket assembly. ';'
NOTE:
Lower left pin is removed with puller;
upper right pin is removed (from rear of ma-
chine) with a punch.
6. Remove lower mounting screw; loosen upper
mounting screw. Punch clutch will now pivot
down for belt removal clearance.
7. Install first stepped feed roll belt; adjust tension.
Refer to Timing Belt Adjustments.
8. Install clutch mounting screws, but do not tighten.