Counterweight Assembly - Printronix

P9212 Maintenance Manual

Counterweight Assembly

1. Unplug the printer power cord from the AC receptacle.
2. Remove the cam cover and the cam cover plate. (See Figure 6–7, page
6–40, items #4 and #12.)
3. Remove the front two allen screws from the counterweight base plate,
and just loosen the rear screw. (See Figure 6–13, page 6–52, item #21.)
4. Remove one allen screw from the counter–weight assembly. (See
Figure 6–13, page 6–52, item #3.)
5. To remove the counterweight, slide the assembly toward the front of the
printer. Take care while removing the counterweight assembly not to lose
the counterweight spring guide shims and spring seat.
6. To install the new counterweight assembly, first remove the rear base
plate allen screw which was loosened in step 3. above. Position this
screw in the base plate rear slot, and with the allen wrench inserted into
the screw, slide the counter weight assembly into place, starting the
screw into the printer deck threads. Do not fully tighten this screw yet.
7. Next, replace the the counterweight allen screw which secures the right
spring seat. (Right side of printer deck) Do not tighten this screw yet.
8. Replace the two front base plate allen screws, and tighten all four screws.
9. Check and adjust the shuttle and counterweight preload (page 5–28).
6–8 Replacement Procedures and Parts