• Topic ID: task_wtk_vxm_zkb
  • Version: 2.0
  • Date: Jun 10, 2020 2:30:38 AM

Tube Fan Equipped Replacement

Prerequisites

Overview

This procedure defines the steps necessary to replace the stationary side Fan Control Module.

Procedure

  1. Move table to its lowest elevation.
  2. Remove the gantry right side cover and disable “Axial Drive”, “HVDC” and “120VAC” switches from the service switch panel.
  3. Remove gantry covers as required.
    Notice Image
    • danger
    • CRUSH HAZARD.
    • UNEXPECTED GANTRY ROTATION CAN CAUSE SERIOUS INJURY.
    • Never service the gantry with the axial drive enabled. Use the gantry rotation lock to lock out gantry rotation. See safety menu of Service Document gui for appropriate procedures.
  4. Position the Tube at 3 o'clock and engage gantry rotational lock.
  5. Remove the Tube by following the procedure in Tube Replacement.
  6. Keep the Tube in steady position.
  7. Disconnect the fan connector from the fan to be replaced.
    Notice Image
    • caution
    • Don't remove both the defective fans at the same time. Replacement of the fans should be done one after another.
  8. Remove all four screws of grill in diagonal sequence and remove the grill as shown in below figure.

    Figure 1. Removing Grill Screws and Grill

  9. Remove all four screws of fan in diagonal sequence as shown in Figure 2, take care of spacers so that they do not fall in heat exchanger.

    Figure 2. Remove Fan Screws

  10. Unpack new fan (5335802) from the packaging box (5749934) and check for any physical damages.

    Figure 3. Fan Inside Packaging Box

  11. Place the new fan on the bracket along with spacers in such a way the connector pins are oriented as shown in Figure 4.
    note:

    Hardware to be used:

    Fresh: Fan, Fan Screws

    Reuse: Lock Washers, Flat Washers, Spacers, Grill, Grill Screws, Pads

    Figure 4. Fan Positioning

  12. Apply a small drop of Loctite 242 on new screw threads provided in packaging box, reuse lock and flat washers (Torque: 6±0.5Nm), make sure spacers are placed properly without projecting out. (See Figure 5)

    Figure 5. Keep Spacer in Place while Tightening Fan Screws

  13. Place grill and tighten screws (Torque: 1.7±0.1Nm) with bumper. (See Figure 6)

    Figure 6. After Putting Grill

  14. Ensure there are no damages for the fan pins and connect the fan cables as shown in Figure 7.

    Figure 7. Fan Cable Connections

  15. Re-install the Tube by following the procedure in Tube Replacement.

Finalization

  1. Verify that the tube fans are operating normally.
  2. Restore the gantry original configuration.