2500_Users_Manual.pdf - 第269页
Repair and Repla cement Procedures ProM aster 25 00 User Manua l 7-25 6. Use a 9/64-inch hex wrench to loosen the four hex screws holding the front and rear carriag e shafts to th e left end plate. Note: Hav e an assis t…
Repair and Replacement Procedures
7-24 ProMaster 2500 User Manual
9. The right lead screw bearing assembly will come away from the right
end plate with the lead screw. Remove the bearing assembly and
replace it with a new bearing assembly.
10. Reverse the procedure to reinstall all of the components.
Replacing the Left
Lead Screw Bearing
Assembly
If the left lead screw bearing assembly fails, follow the steps below to
replace it.
1. Turn off the 2500 and remove the power cord.
Note: This procedure requires two people to perform the steps safely.
2. Slide the beam over the programming station.
3. Use a 1/8-inch hex wrench to remove the four screws in the bearing
cover plate on the left end plate.
4. 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.
5. Loosen the two main plate corner screws and lift the main plate.
6. Use a hex wrench to remove the two screws holding the left end plate
to the main plate.
7. Lower the main plate and slide the end plate off the shafts and lead
screw.
8. The left lead screw bearing assembly will come away from the left
end plate with the lead screw. Remove the bearing assembly and
replace it with a new bearing assembly.
9. Reverse the procedure to reinstall all of the components.
Replacing the Lead
Screw
If the lead screw is damaged, follow the steps below to replace it.
1. Turn off the 2500 and remove the power cord.
2. Slide the beam over the programming station.
Note: This procedure requires two people to perform the steps safely.
3. Look through the two holes in the top of the beam traverse motor’s
mounting block while you manually rotate the lead screw until the
heads of the flex coupler set screws are visible through the holes.
4. Use a 7/64-inch hex wrench to remove the set screw on the left side of
the flex coupler.
5. Use a 1/8-inch hex wrench to remove the four screws in the bearing
cover plate on the left end plate.
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.
Repair and Replacement Procedures
7-26 ProMaster 2500 User Manual
9. Apply a small amount of purple Loctite on the outer surface of the
new nut where it contacts the carriage during operation.
10. Twist the new anti-backlash nut into place and carefully re-assemble
all of the disconnected components.
Replacing the Beam
Gasket
If there are air leaks in the beam, follow the steps below to replace the
beam air channel gasket.
1. Turn off the 2500, remove the power cord, and disconnect the air
supply.
2. Disconnect the vacuum sensor cable from the vacuum sensor switch.
3. Disconnect the four solenoid cables.
4. Use a 3/32-inch hex wrench to remove the solenoid cable connector.
5. Disconnect the beam head rotation motor cable.
6. Disconnect the three optic cables.
Note: Write down the cable positions before you cut the tie wraps that hold the
cables in place.
7. Use a 1/8-inch hex wrench to remove the two screws that hold the
cable harness to the right side of the beam.
8. Disconnect the gray air line and the black vacuum line from the two
quick connects, noting their location.
9. 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).