[dwreiddw]

How do you remove the old sprayer arm so new one can be installed?

[PS Staff - Sheila]

The bottom spray arm can be remove by unscrewing the spray arm cap.

It is number 34 on the pump and motor breakdown.

The upper spray arm can be remove by unscrewing the nut that is above the arm.

It is number 32 on the pump and motor breakdown.

Here is a link to your dishwasher model MDB4000AWW.