Arm R Belt; Arm R Motor, Gearcase, Encoder Or Encoder Belt - Hologic QDR 4500 Technical Manual

Arm R Belt

To remove and replace the Arm R Belt refer to Figure 5-7 and Figure 5-8 , and follow the
procedure below:
1. Remove the tank covers.
2. Remove the X-ray controller assembly (to gain access to the front belt clamp).
3. Remove the rear C-arm shoulder cover.
Note: Take care not to move the C-arm during the remainder of this procedure.
4. Remove the belt tension nut, and remove the rear belt clamp (four 5/16" bolts).
5. Remove the belt from the motor pulleys. Access the pulleys from the left side of the
Scanner looking under the C-arm (see Figure 5-8).
6. Remove the belt from the front belt clamp (four Phillips screws).
7. Install the new belt in reverse order, front belt clamp first, then over the pulleys, then
rear belt clamp.
8. Tighten both belt clamps.
9. Loosen the belt tension block (two 1/4" bolts).
10. Install the tension nut and adjust to 7/8" from the inside of one washer to the inside of
the other washer.
11. Tighten the tension block bolts.
12. Perform the MOTOR$AR calibration procedure.

Arm R Motor, Gearcase, Encoder or Encoder Belt

To remove and replace the Arm R Motor refer to Figure 5-7 and Figure 5-8, and follow the
procedure below:
1. Remove the rear C-arm shoulder cover and the arm R motor cover plate.
2. At the rear of the C-arm, remove the belt bracket (2 bolts) while leaving the belt
attached. This provides enough slack to remove the belt from the motor pulleys.
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QDR 4500 Technical Manual