Original rubber extension tube had worn where it connects to the rotary fitting under the upper basket

First I removed the upper basket from the dishwasher by taking off the end clips from the right and left hand slides. The clips are removed by prying them gently upward with a screwdriver.

Second I removed the old spray arm assembly by slipping the old tube off of the rotary fitting.

Third I removed the center screw from the rotary fitting which holds the upper spary arm in place. I also removed the small plastic piece (block) which is clipped to the wire basket.

Fourth I installed the new spray arm assembly making sure to orient the plastic spacer block so that the spray arm rotates freely. The spacer block clips on the wire tray and the assembly is held in place with a single screw.

The new assembly includes a one piece extension tube and end funnel so it is really easy to install.