• SIGNA™ Hero 3.0T Service Methods
  • 5852800-8EN Revision 1.0
  • Object ID: 00000018WIA30CF1E40GYZ
  • Topic ID: id_2019705 Version: 2.18
  • Date: Oct 11, 2021 6:31:30 PM

Removing the hydraulic cylinder

Removes the hydraulic cylinder from a dockable patient table.

Procedure

  1. Raise the patient table to the full up position.
  2. Lower the table lock safety bar, then lower the table to make sure weight is resting on the safety bar.
    Figure 1. Table lock safety bar
    1Safety bar up (unlocked)
    2Safety bar down (locked)
  3. Remove the tie wrap and black cushion tape from the hydraulic line.
  4. Use a long-handled, ball-end 3 mm Allen key to remove the hex screw from the anti-rotation collar at the top of the hydraulic cylinder, and then use a 4 mm Allen key to remove the two screws securing the upper bracket to the underside of the table.
    Figure 2. Anti-rotation collar and upper bracket
    1Anti-rotation collar screw
    2Upper bracket screws
  5. While moving the table down valve to the rear of the table, pull down on the hydraulic cylinder until it is fully retracted.
    1Table down valve
    2Hydraulic cylinder
  6. Put sufficient absorbent towels underneath the work area.
  7. Disconnect the black hydraulic line from the base of hydraulic cylinder using two 3/4 inch open-end wrenches, then fasten the line up and to the side to avoid excess spillage. Use a flat-blade screwdriver to unfasten the clamp from the clear low-pressure line, then remove it and fasten the line up.
  8. Remove the e-clip from the end of the cylinder mounting pin, located at base of the cylinder assembly.
  9. Disconnect the table down valve actuator from the hydraulic cylinder by removing the attachment screw.
    Figure 3. Table down valve actuator
  10. Slide the cylinder mounting pin out from the base of the hydraulic cylinder.
    Note: Use the brake pedal to engage brakes.
  11. Remove the hydraulic cylinder from the base of the table chassis by angling the cylinder top toward the rear while lifting the base up and out.
  12. Measure and record the distance between the height adjustment screw nut and the top of the cylinder shaft.
    Note: When installing the new hydraulic cylinder, set the distance between the height adjustment screw nut and the top of the cylinder shaft to the same measurement observed in this step.
  13. Remove the e-clip, upper bracket, anti-rotation collar, and adjustment screw from the top of the cylinder, and retain the parts.
    1E-clip
    2Upper bracket
    3Adjustment screw
    4Hydraulic cylinder shaft
    5Anti-rotation collar
    6Distance between height adjustment screw nut and top of cylinder shaft