Leadscrew And Head Carriage Assembly - IBM System/34 Maintenance Manual

23-160 LEADSCREW AND HEAD CARRIAGE
ASSEMBLY
Removal
1.
Set Power to 0 (operator panel).
2. Remove the 33FD from the machine (see
paragraph 23-1
(0).
Note the path of the head
cable so it has the same path after replacement.
3. Remove the leads from the connector by pushing
down with small screwdriver as shown:
4. Center the head carriage on the leadscrew by
turning the stepper motor wheel.
5.
Remove the stepper motor. and leadscrew
wheel • .
6.
7.
Remove the covers (see paragraph 23-130).
Loosen the clamping screws on the upper and
lower stops
G.
8. Remove the two screws and the bottom bearing
8·
12
CAUTION
Do not lose the spring • when you remove the
shaft. Note the bend in the spring, so you can
reinstall it the same way.
9. Slide the leadscrew assembly down until the top
clears the baseplate, then slide the assembly out.
CAUTION
Do not let the pressure pad arm hit the head.
10. Remove the top bearing and both stops from the
leadscrew.
23-160
--(
I
(
I
__ -.-S