IBM 1402 Reference Manual page 20

MAIN DRIVE REPLACEMENT
1. Trip clutch between 230' and 300', and turn input
idler pulley, manually, until dog engages in clutch
ratchet.
2. While holding armature in tripped position, con-
tinue turning machine until latching surfaces of
clutch latch ann and dog carrier coincide. See
Figure 3-21F. Punch feed index should be
315
0
±
W.
3. Set timer index at 315'.
4. Slip input drive belt on geneva pulley and, while
keeping the relationship between lower pulley and
input idler pulley (315' at the clutch and 315' at
the timer), slip belt onto both pulleys. Adjust
tension and recheck timing relationship. Refer to
Timing Belt Adjustment.
5. Time the geneva.
NDTE
a. Loosen geneva pulley lock screws.
b. Set timer index and puncn index to 0'.
c. Depress geneva lock pin into timing slot and
tighten geneva pulley lock screws.
NOTE:
At 315', if everything is in time,
geneva pin will detent and punch clutch will
line up as described in Step 2.
FI RST STEPPED FEED
ROLL DRI VE BELT
DARKENED BELTS ARE UNDER CONTROL
OF PUNCH FEED CLUTCH
HOTOR PULLEY
Figure 3-15. Punch
Feed·fi~g
Belts
,,~,,:
DRIVE MOTOR BELT REPLACEMENT
1. Mark CR idler belt (3) and pulleys to maintain
timing.
2. Loosen CR idler belt (3) and slip it off.
3. Install drive motor belt and tighten.
4. Install CR idler belt (3), line up reference marks,
and tighten with idler pulley.
CR IDLER BELT REPLACEMENT
1. If there is enough room to work belt between
the index pulley and cross-over shaft pulley, the
index timer unit does not have to be removed
from base. If removal is necessary, loosen three
base mounting screws on timer index.
2. Install new belt; tighten idler pulley and, if nec-
essary, tighten three base screw on timer index
unit.
3. Retime index timer.
a. Loosen timer index set screws (Figure 3-15).
b. Unlatch punch clutch between 230' and 300'
and, while holding armature in tripped posi-
tion, continue turning machine until latching
surface of clutch arm and dog carrier coincide
(See Figure 3-21F).
CR I DLER SHAFT
DRI VE TO
TRANSPORT
MECHANI SH