M126/M127/M128 4-4 SM
4. ACM pick tire roller (A).
 If the left hub is gray, then disconnect the old right and left tire/hub assemblies from the
ACM, and replace with the new right and left tire/hub assemblies.
 If the left hub is black, then remove the old right and left tires from the ACM hubs, and
replace with the new tires. Do not attempt to remove the hubs.
4.2.2 CARD READER REMOVAL
1. Scanner front cover ( p.4-25 "Scanner Front Cover Removal").
2. Operator panel keypad assembly (
p.4-51 "Operator Panel Keypad Removal")
3. Release the tabs on the rear of the operator panel display and tilt it upright.
4. Remove the two screws (A) securing the card reader housing to the tub assembly.
5. Disconnect the card reader cable from the card reader.
6. Remove the LED light tube (B) from the upper card reader cover.
7. Pull the two tabs (C) back and remove the card from the card reader housing.
 When replacing the light tube, cover the tube with a small piece of black electrical tape if
possible.
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