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M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 163
Service Procedures: Cart
Cart
This section contains procedures for servicing the lift column, the wheels, and the lower
enclosure top panel.
➤ Replacing Cart Wheels (Caster Assemblies)
Although the front wheel assemblies on the cart are different from the rear wheels (front wheels
have swivel locks and brakes, rear wheels do not lock), the replacement procedure for all wheels
is the same.
Each cart wheel is supplied as a caster assembly. The front caster assembly includes the integral
brake and swivel lock.
WARNING
The cart is heavy. Use caution while performing this procedure.
To replace a caster assembly:
1. Disconnect the system power cord from the main AC supply.
2. Secure the wheel locks.
3. Chock both front wheels if a rear wheel is being replaced, or chock both rear wheels if a
front wheel is being replaced. The chocks are a safety measure, to prevent the cart from
rolling during this procedure.
4. Carefully lift the front or the back of the cart (depending on which wheel you are replacing),
and slide a support block under the front or rear edge of the lower enclosure to hold both
wheels at that end slightly off the floor. Make sure the cart is stable in this raised position.
5. Use a 13-mm wrench to remove the four bolts that secure the wheel assembly to the
bottom of the cart base, and remove the wheel.
6. Reverse step 5 through step 1 to install the new wheel assembly.