IBM 1402 Reference Manual page 34

4. Tighten split hub on drive pulley. Punch unit is
now timed to the transport and geneva.
5. With the punch unit in time, the timing holes
will line up at 0° every third revolution of the
machine index.
REMOVAL
1. Remove die.
2. Remove brush block assembly.
3. Remove two belts from punch unit shaft.
4. Remove four holding screws from top of unit.
5. Disconnect four multi-terminal connectors.
6. Lift punch unit from machine.
REPLACEMENT
1. Stepped side frame machines: (See illustration
A.)
NOTE:
Punch unit on this type of side frame
requires four, two-inch long bushings (PIN
607770) in top plate. See Figure 3-31.
a. With lowering frame fully down
l
install two
punch unit adjusting plates 610688. Plates are
3-24.1