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Carriages, Static drain wire and tracks
Replacing the carriage wheels
Each head carriage has 16 load wheels and 16 guide wheels. The wheels are mounted in wheel pad
assemblies attached to the upper and lower head carriers. The load wheels are set parallel to the horizontal
top track surface, while the guide wheels are set parallel to the vertical side surfaces
Use this procedure to replace the carriage load wheels and guide wheels
1. Scan the heads to the offsheet position at the cable end and turn off the Motor Power keyswitch.
:
WARNING
2. Remove all of the beam covers
3. There are four wheel pad assemblies attached to the upper head carrier and four attached to the
lower head carrier for a total of eight wheel pad assemblies. Remove the two 3/8"-16 fastening
screws from any one of the eight wheel pad assemblies in order to remove the wheel pad.
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OTE
4. Remove the track wiper from the end of the wheel pad.
5. Inspect the smaller vertical guide wheels. If they need replacing, the four vertical guide wheel
shafts need to be pressed out of the wheel pad assembly and then pressed back in with the new
wheels attached.
6. To replace the larger horizontal load wheels, remove the retaining ring from each of the four
wheel axles and remove the load wheels.
To perform any maintenance, troubleshooting, or replacement of
components, ensure that power is disabled at the breaker.
Only remove one of the four wheel pad assemblies at a time. The
remaining three need to be left in place in order to support the head
carriage on the fiberglass track.
Figure 24 Carriage Wheel Assembly
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