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Here's how to BOOST internal water pressure for $1.79.

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This was actually my final post from a problem thread. But I thought it might help others so I've given

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Old 12-14-2012, 12:40 PM
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Join Date: Nov 2012
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drkenrich is on a distinguished road
Smile Here's how to BOOST internal water pressure for $1.79.
Model Number: MDBH945AWS   Brand: Maytag   Age: 5 - 10 years   

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This was actually my final post from a problem thread. But I thought it might help others so I've given it a new title so other can find it. The previous thread was Substitution parts for Paytag Dishwasher?.

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Since I couldn't find an expert here that could give me help on increasing my internal circulating water pressure, and wasn't able to find any specs on the parts list for possible replacement, I had to do the DIY method. I made my own with great success!!

All it took was $1.79 for the top of a regular 5 oz. tuna can and three small brass screws no more than 3/8" long. Since I didn't have plans I had to experiment. So, if anyone is reading this thread here's what I learned.
1. The top of the impeller to housing clearance is too close to put anything on top of the impeller.
2. The bottom has enough room to work - but keep it thin.
3. There is some pressure sensor in the system that shuts down if there is too much water pressure. I had a working model, but it kept shutting off after about 10 second of high pressure, then would cycle again. This cleared up when I cut down the size of the "improvement".
4. I won't cover all the little details except think about rust. Use a can and screws that won't rust quickly. It's easy to replace, but why if you don't have to?

Here's how:
1. Cut the bottom out of a 5 oz. tuna, chicken, etc. can. It's about 3 5/8 dia. and about perfect in final size.
2. Drill a tap hole in the very center. Then carefully cut a 1" hole using the tap hole as a guide. I used a 1" wood bit since it's very thin soft metal.
3. With tin snips or kitchen scissors, expand the hole until it fits snuggle around the ring on the bottom of the impeller.
4. Mark the diameter of the impeller on the metal disk. While doing this mark a continuation line of the impeller vanes onto the disk and another line extending from the impeller vane end through the impeller center to the outer edge of the disk. The idea is that you want to extend the vanes for more thrust of the water as the impeller turns.
5. Cut a line from the outer edge of the disk to the edge of the impeller line along the straight line from edge to center. This will be about 1/2" long.
6. Bend to 90 degrees the tabs along the vane lines so when it's fit in place it literally extends the vanes another 1" (approx.).
7. Fit the disk onto the impeller from the bottom with the vanes pointing up and rotate the disk so they line up with the impeller vanes.
8. Cut the bent up vane so that anything extending above the top edge is removed by at least 1/8". This will prevent contact with the upper housing.
9. Once cut to size and lined up properly drill three small holes in the disk and into the bottom of the impeller to fit your three brass screws. Screw it in place and replace everything.

To TEST - Before you replace everything. Screw the impeller in place and install the cover with 3 screws. Run it on rince cycle to make sure it doesn't stop and cycle. If it does simply use the tin snips to cut a little more off the outer edge of the disk and bent up vanes. Try again until it works right.

You'll end up with a lot more internal water stream pressure. I hope someone can use this.

It's the right time of year so - Merry Christmas!
drkenrich


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