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Pump Housing Filter
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Pump Housing Filter Specifications
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Replacing your Maytag Dishwasher Pump Housing Filter
1a) Unscrewed lower spray arm cap. Removed lower spray arm. Removed metal radiant shields from lower spray arm, cleaned them, and snapped them onto the new lower spray arm.
1b) Removed Torx screws from pump cover, then removed pump cover.
1c) Curled new filter into circular shape, interlocking the tabs to connect the ends together, then replaced the old pump housing filter by removing the old filter and then pushing the new one into place in the pump cover. Old O-ring was fine, so didn't really need to replace it.
1d) Re-installed pump cover by aligning the water ports on the cover with those in the dishwasher, then pushing cover down into place, then installing and tightening the Torx screws. If I were to do this repair again, I would replace the pump cover with a new one.
1e) Installed the spray arm by placing the new lower spray arm into position over pump cover, then screwing in the lower spray arm cap.
2) Upper Spray Arm
2a) Removed upper spray arm by unscrewing the snap outlet nut, then removing the spray arm retainer. This way, the retainer is undamaged and can be re-used.
2b) Attached new upper spray arm to snap outlet nut by pushing old retainer through new upper spray arm and into snap outlet nut.
2c) Installed new upper spray arm by screwing snap outlet nut back into the dishwasher.
Unfortunately, the Pump Housing Filter was still cold (freezing weather during shipment and left at the front door) and when I started to bend it into shape it broke in two places. So I tolk the old filter and some Lime away and slowly cleaned it with soft brush to open 95% of the holes.
Once ready it was installed along with the other new parts and the dishwasher works very well.
Simple homeowner repair.
I also wanted to improve the cleaning level that had decreased over the years. I removed the uppper pump housing by removing the hand nut on the lower spray bar then the 6 T-20 torx screws. Inside the plastic filter screen. I found that the screen was partially plugged by either minerals or dried detergent. The old one was stuck slightly to the lower pump housing. I tried to poke out the debris out of each of the screen holes but was taking way too long. I did not try chemicals but since I was ordering parts made sense to have a new one shipped in. You have to snap the new screen together and align the edges before inserting it into the lower pump housing. Reassemble the upper pump housing. Be sure to clean the filter spinning arms of debris along with the lower (and upper) spray arms befrore reassembling them. Ran the dishwasher a couple of full cycles to check for leaks and found none.
FYI, the dishwasher will not clean as well if you fill it with cold water and even with the heat element, the cycles take a very long time to run through to allow for heating the water. Once I reinstalled the dishwasher, I notice an improvement in cleaning.
The upper spray arm comes off by gently pulling down on the spray arm. I put the new one in its place.
The lower spray arm had a thin, large (about 2" diameter) round screw holding it and its housing in place. I removed the large, flat screw and the lower arm came off. Below that was the filter housing. I unscrewed the six screws, took off the housing, replaced the filter, and put the housing back on.
Then I removed the lower arm from the plastic thing that was holding it, removed the stainless steel heat plates and put them on the new washer arm. Put the washer arm back on the thing that held it, and screwed the washer arm assembly in place with the large plastic screw.
Manufacturer Part Number: WP99001791
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