Motor lockup due to shaft seal & impeller tightness ??

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by AcidWater, Apr 22, 2013.

  1. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    Is it possible to wrongly install the shaft seal and drain impeller washer on a dishwasher so that they are too tight and thus cause the motor to strain or lockup ?

    I'm not talking about the necessary clearance so the impeller itself does not drag within its housing.

    How does the shaft seal work, mechanically? Does the shaft spin around the metal collar in the shaft seal, or does the face of the graphite ring on top spin against the bottom face of the impeller washer??

    I can see that the face of the graphite ring on top needs to press tightly against the corresponding face of the impeller washer to prevent a leak.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,237
    Location:
    Cave Creek, Arizona
    The two faces spin against each other. You aren't going to give up on that dinosaur are you?
  3. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    Not until I know what's wrong with it. Learning stuff.

    The lower seal must not spin at all; otherwise the rubber on the outside diameter would abrade ??? So the washer on the bottom of the impeller spins against the stationary graphite ring on the seal?

    Even installing a new unit would involve changing or un-sticking the water inlet cutoff valve, so I'm going to shut off the house & see if I can make it work, it as my next step.
  4. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    The pump comes off of the motor...

    Only unique things about this motor are

    1) the pattern of the bolt holes for attaching the pump

    2) the pattern of the 3 studs which the retaining clips hook over

    But might this not be a standard sort of motor end plate?
  5. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    FOUND THE MOTOR

    factory Whirlpool/Kitchenaid parts center: 800-253-1301 and they still have the original parts numbers on their system.

    They said that the motor part number in my book is now 4711686. They don't have any more, but I snagged the one on ****.

    They also still have some rubber parts like the door seal !!!
  6. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,508
    Location:
    Houston, TX
    Maybe pictures would help.


    Call the Maytag Man, He has nothing to do and is waiting for your call.
  7. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
  8. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,508
    Location:
    Houston, TX
    If they are truly replaceable then,

    First thing that you need to do is mark the Motor Housing so that you can align it back up Exactly the way it is before you disassemble.

    The motor rotor shaft ends will need to be cleaned, so they can pass thru the bearings. Pull straight apart.

    You should use a Arbor Press to remove them from the housing. They are pressed into the ends of the motor housing.

    Next step, Buy a new Dishwasher and use that one to play with, then you can disassemble the Timer.


    Good Luck.
  9. BobL43

    BobL43 DIY Senior Member

    Messages:
    1,799
    Location:
    Long Island, NY
    DON! you da man! I used to do that stuff when I was back in High School. Taking apart old washing machine motors, replacing bearings and those old cetrifugal start switches. Those were the days. Those old timers were fun too, especial those that you pulled the handle on and moved the slider to your "program" and pushed it back in, as opposed to the old rotary ones, that were also fun for me to fix if i could. I used to make some pocket money repairing appliances for neighbors, getting most of my parts from old machines other neighbors threw out. Its not that they did not know where those parts came from, as they benefited from the cost savings.
    Uh, yes they had appliances 55 years ago:p
  10. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    The top & bottom housing pieces are stuck nice & tight to the stator... should I spray WD40 to loosen them up? Am I going to need to tap them with a mallet or should they slide off easily?
  11. BobL43

    BobL43 DIY Senior Member

    Messages:
    1,799
    Location:
    Long Island, NY
    Hmm, where is that crystal ball when I need it?

    I doubt if it will come apart too easily, but who knows? I'm looking for that ball now.
  12. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,508
    Location:
    Houston, TX

    They are fit tight together.

    WD40 won't hurt anything. You will not likely find new bearings. I would have used Turbine Oil and lubed the bearings without needing to disassemble.

    Can you take a picture of the Motor ?
  13. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    Photo here:

    http://www.automaticwasher.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?22850

    I hesitate to whack on the ends unless that's the way its done. Do the pros put some sort of turnbuckles between the two ends and crank it open evenly?

    I'm told the bearings are a standard type of part.

    How can I get oil to the bearings without removing something?

    Also found this:

    http://www.fixya.com/support/t9437235-hobart_5hp_kd_18_electric_dishwasher

    >Flash is motor start switch it arcs while dis-engauging start windings is normal. just make sure winding do not appear to look blackish
  14. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,508
    Location:
    Houston, TX
    That motor may have a start cap, Is it good ?
  15. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    no external cap.
  16. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,508
    Location:
    Houston, TX

    Did you get it apart ? If you are having a hard time separating the halves you can loosen the screws slightly and just lightly tap the head of the screws. You should not need a big hammer, just the handle of a screwdriver should work.

    Did you get your new one yet ?


    Good Luck
  17. AcidWater

    AcidWater New Member

    Messages:
    123
    Location:
    .
    Tapping the loose screws is a good method. Have not messed with it yet. Have the replacement motor & very lazy in installing it. Not feeling like lying / kneeling right now. Wife hasn't yet complained about doing dishes by hand :)
Similar Threads: Motor lockup
Forum Title Date
Plumbing Forum, Professional & DIY Advice Heil Blower motor and Inducer needs to be replaced....how do I identify the part # ? Mar 24, 2014
Plumbing Forum, Professional & DIY Advice Trick installing dishwasher motor & gasket? Apr 30, 2013
Plumbing Forum, Professional & DIY Advice hello from the motor city with a question (2nd floor bathroom leak) Apr 24, 2013
Plumbing Forum, Professional & DIY Advice Dishwasher motor sparks; not draining properly Apr 20, 2013
Plumbing Forum, Professional & DIY Advice humming motor sound in our wall Apr 18, 2013

Share This Page