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klc4570  
#1 Posted : Saturday, January 29, 2011 10:30:09 AM(UTC)
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klc4570

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My machine is clogged with hard water deposits. I am trying to disassemble the lower arm so I clean the arm, screen and everything else down there, but the hub, which does appear to have threads, just spins, and I can't figure out how to get this lower spray arm assembly off.
It turns, but does not seem to be coming off. Any hints?
Thanks a lot!
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denman  
#2 Posted : Sunday, January 30, 2011 12:32:50 AM(UTC)
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denman

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Here is a manual, although it is not for your given model number, I think the pump is the same.
https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/52521bdbd0ef763c85256cbc00520548/$FILE/8178022.pdf

If the water is very hard you may want to give the unit a de-liming every once in a while.
Add about a quart of vinegar and let it sit for an hour or so.
Then let it fill and run for a minute then again let it sit for an hour or so. Do this several times then let it finish the cycle.

They also make a dishwasher cleaner that does the same thing, just more expensive. It is usually oxalic acid.

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klc4570  
#3 Posted : Sunday, January 30, 2011 7:57:25 PM(UTC)
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klc4570

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Thank you--I appreciate it!
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whirlpool dishwasher disassembly (Dishwasher Repair)
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