User manual

Repair and Replacement Procedures
ProMaster 2500 User Manual 7-25
6. Use a 9/64-inch hex wrench to loosen the four hex screws holding the
front and rear carriage shafts to the left end plate.
Note: Have an assistant hold the lead screw and shafts during the next steps.
7. Loosen the two main plate corner screws and lift the main plate.
8. Use a hex wrench to remove the two screws holding the left end plate
to the main plate.
9. Lower the main plate and slide the end plate off the shafts and lead
screw.
10. Twist the lead screw until it pulls away from the beam traverse
motor. Walk the lead screw through the beam, then slide it away
from the 2500 through the left endplate.
Note: Make sure the anti-backlash nut remains intact when you remove the lead
screw.
11. Reinstall the lead screw and all of the removed components.
12. Lubricate the screw as described on page 5-63.
Replacing the Anti-
backlash Nut
If the anti-backlash nut is damaged, follow the steps below to replace it.
1. Remove the lead screw (as described in steps 1 through 10 on page
7-24) and carefully set it aside.
2. Use a 5/64-inch hex wrench to remove the two screws that hold the
limit bar to the beam shafts (see Figure 7-17).
3. Pull the beam up and away from the beam shafts. Leave all of the
cables connected and carefully set the beam aside.
4. Use a 9/64-inch hex wrench to remove the four screws that hold the
front carriage shaft in place.
Note: There are two 9/64-inch hex screws at the front of the left end plate and
two 9/64-inch hex screws at the front of the right end plate.
5. Support the carriage while you slide the front carriage shaft through
the carriage. Set the front carriage shaft aside.
6. Use a 9/64-inch hex wrench to remove the four screws that hold the
rear carriage shaft in place (this is similar to step 4, above).
7. Support the carriage while you slide the rear carriage shaft through
the carriage. Set the rear carriage shaft aside.
8. From the left side of carriage, insert the anti-backlash nut removal
tool into the anti-backlash nut and twist it counterclockwise. As you
twist, the anti-backlash nut will protrude from the right side of the
carriage. Guide it out with your hand.
Note: You may need to use a wrench to break the anti-backlash nut free.