• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA30EAAE20GYZ
  • Topic ID: id_13105834 Version: 3.4
  • Date: Feb 6, 2020 1:49:29 PM

Rear end bell removal and installation

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
2Not Applicable135 minutes15 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Nonmagnetic Titanium Service Tool Kit, Large Set1-5112581-
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
Rear End Bell Assembly1-

Refer to the FRU Manual

-
Table 4. Safety

Procedure

  1. Perform LOTO on the PDU. See the MR Service Safety Manual, PN 5452735.
  2. Remove the front portion of the split bridge Bridge and Longitudinal Drive Belt Replacement.
  3. Remove the rear cosmetic covers Rear Cosmetic Cover Removal and Installation.
  4. Remove the nuts and washers holding the rear pedestal to the magnet, and move the rear pedestal away from the magnet.
    Figure 1. Remove nuts securing pedestal to magnet enclosure
  5. Remove the five screws holding the rear end bell to the turtle bracket.
    Figure 2. Rear end bell screws
  6. Remove the two RF transmit cables from the RF body coil.
  7. Remove the patient air hose from the rear end bell.
  8. Remove the two RF coil cooling air hoses.
  9. Remove the rear end bell.
  10. Reverse the above steps to install the rear end bell. Confirm the gap between the rear end bell and the RF body coil is 2.5 +/- 0.5 mm with a desired gap of 2.0 mm.

    If the gap measurement is outside the desired range, see RF Body Coil Replacement.

  11. Verify proper fit of the covers.

Finalization

  1. Remove LOTO from the PDU. See the MR Service Safety Manual, PN 5452735.
  2. Verify that the speaker, patient air, and bore lights work.
  3. Do a body scan to ensure the system is working properly (see Doing a check scan).