• Topic ID: id_16157502
  • Version: 4.0
  • Date: Jan 20, 2020 8:36:04 PM

Gantry Top Covers Removal and Re-Install

Prerequisites

Overview

This procedure explains how to remove and re-install the CT Gantry top covers.

1 Top Cover Removal

Procedure

    • caution
    • Potential for Shock.
    • Voltage may be present. Potential for injury if covers removed and power is left ON.
    • Always remove the right side cover first, and turn OFF power at the service switches.
  1. Remove the gantry right side cover.
  2. Stop the rotor of X-ray tube in case of Liquid Bearing Tube before HVDC off. Refer to Liquid Bearing Tube Rotor stop procedure for details.
    3. Notice Image
    • notice
    • Always turn OFF the HVDC before the 120 VAC. Turning OFF 120 VAC power before HVDC power can result in equipment damage.
  3. Turn OFF the three (3) main power switches (HVDC, 120VAC, and Axial Drive) on the Service Switch Panel (SSP). See Figure 1.

    Figure 1. Service Switch Panel

  4. Unscrew two screws that secure the top cover with Philip top screwdriver. See Figure 2.

    Figure 2. Screws Securing Top Cover

  5. Take the end of the top cover nearest to the side cover and tilt upwards.
  6. Slide the cover down to disengage the tab from the mounting bracket.

    Figure 3. Top Cover Tabs and Bracket

  7. Lift the cover clear and repeat the above steps for the other cover.

2 Top Cover Installation

The top cover consists of two (2) pieces. Install the front and rear gantry covers, if not already installed.

Procedure

  1. Take one of the top covers and align the tabs on the cover with its associated bracket. Lift and slide the cover into place. Secure 2 screws on the top cover.
  2. Take the other top cover and align the tabs on the cover with its associated bracket. Lift and slide the cover into place. Secure 2 screws on the top cover.
    3. Notice Image
    • notice
    • Always turn ON the 120 VAC before the HVDC. Turning ON HVDC power before 120 VAC power can result in equipment damage.
  3. Turn on the three (3) power switches.
  4. Ensure fans work properly.
  5. Re-install the gantry side covers.

3 Finalization

Procedure

  1. Verify all covers, especially side covers are properly secured.
  2. Ensure there is no interference during all tile range.