GE MEDICAL SYSTEMS
D
IRECTION 2392751-100, REVISION 3VIVID™ 4 SERVICE MANUAL
8-106 Section 8-6 - Lower Section Components Replacement
8-6-9 Front Wheel Replacement Procedure
NOTE: This section describes the installation and removal procedures for the earlier-type of front wheel
(Part No. 2269437) and the newer improved type (Part No. 2392789). The installation procedure is
slightly different for each type of front wheel, as described in the procedures below.
When replacing the earlier type of front wheel (Part No. 2269437) with the same type of wheel, refer to
the following instructions:
• Front Wheel Removal - Procedure 1 (see below)
• Front Wheel Installation - Procedure 1 on page 8 - 110.
When replacing the earlier type of front wheel (Part No. 2269437) with newer improved type (Part No.
2392789) make sure you replace BOTH front wheels. When ordering the new-type Front wheels, you
will receive a new transverse arm which should also be replaced (between the two wheels). Refer to
these instructions:
• Front Wheel Removal - Procedure 1 on page 8 - 106
• Front Wheel Installation - Procedure 2 on page 8 - 110.
If replacing the newer improved type (Part No. 2392789) with the same type of wheels, refer to the
following instructions:
• Front Wheel Removal - Procedure 2 on page 8 - 108
• Front Wheel Installation - Procedure 2 on page 8 - 110.
8-6-9-1 Tools
Use the appropriate flat and Phillips-type screw drivers, a wire cutter, the appropriate Hex wrenches
and the appropriate Allen keys as indicated in the front wheel replacement procedure.
8-6-9-2 Preparation
Shut down the Vivid™ 4 ultrasound unit, as described in Chapter 3 - Installation.
8-6-9-3 Front Wheel Removal - Procedure 1
Note: Before you begin, make sure you are working on a flat surface with the wheels facing the front
and the brake in the left (locked) position, preventing movement.
The machine will remain stable, even after one wheel has been removed. However, for a safer
working environment, it is recommended to support the unit with wooden blocks or a jack.
WARNING: Do not lean on the machine, or leave it unattended without support, if a wheel has
been removed.
1) Remove the Vivid™ 4 front cover, as described in the Front Cover Removal Procedure on page 8 - 5.
2) Using a flat screwdriver, push up and release the locking spring washer located in the center of the
transverse arm (wheel position bar), as shown in Figure 8-94 on page 8-107. Lift the wheel position
bar upwards (without completely removing it).
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