Medrad ProVis Mark V, Service Manual

Page: 128 / 143

Disassembly and Reassembly
16 - 21
Injector Head
- Plunger Motor Drive Belt
Removal and replacement of the Plunger Motor Drive Belt requires
extensive disassembly, reassembly, calibration and checkout.
Although the procedures are included here, we do not recommend
field repair of this item, and suggest that the injector head be returned
to MEDRAD for these repairs.
Drive Belt Removal 1. After disassembly of the injector head, remove the two screws
securing the cable bracket on the rear of the injector head, and the
two screws securing the limit switch.
2. Remove the belt from the rear of the motor gear by rotating the
gear while removing the belt from the large drive pulley.
Drive Belt
Replacement 1. Position the replacement belt over the flanged motor gear. Align
the belt teeth with the teeth of the large drive pulley, then begin to
slide the belt onto the gear.
2. Rotate the gear while pushing the belt onto the large drive pulley.
The belt need not be centered on the gear; the belt will become
centered as the motor turns.
CAUTION : The drive belt must be tightly secured. If not
sufficiently tightened, the belt could jump from the gear
teeth at high pressures. Equipment failure or malfunction
may result.
NOTE : If it is necessary to tighten the drive belt, loosen the
four screws securing the drive motor. Apply tension to
the drive belt by prying the motor case with a screw-
driver, then tighten the four motor screws. Repeat this
process as required until the belt does not slip during a
full pressure injection. Refer to Figure 16.4.
!