Hobart WM-1D dishwasher

[mikeCL]

I could really use some help with this, first of all I don't know the age of it. But it's installed in a church with the external hot water heater.

First is I can't get it to pump any water into the dishwasher..

Second is the motor only hums for the cycle time.

And last is I can't find any info at all about this dishwasher and no manual.

I do have pictures but right now my internet is being crazy right now and it took me 5 min just to get to the create a new message thread here.

I do have a youtube video which should hopefully explain things

 

[stevet]

Share some info

Mike,
Send or post the serial number and I can probably give you a ballpark idea of its creation date. Also, if you have the ML-Number, that will provide the exact parts manual you need and I may be able to help there too. Don't get your hopes up too high as they stopped making these in the very early 80's and not much is available for it from Hobart. Some parts are available. Getting water into it isn't too much of a problem so let's explore the possibilities..
If you put water into it manually, does it actually make more than a humming noise? It will sound like it's only humming if there is no water going in. And of course, is the water actually turned on? Maybe someone turned it off fearing that the water line may freeze???
Steve

 

[mikeCL]

Thanks Steve for the help, I was fearing no one knew anything about this

Now that my internet speeds are working this should be more help

 

[mikeCL]

Oh I forgot to say I haven't tried to put water in it manually yet but I will try again tonight.

 

[stevet]

Start from the beginning

Mike, it sounds like your timer was in the middle of the cycle and was trying to fill for the short fill before the final rinse. Close and latch the door and let it finish the cycle. Once it stops, when you lift the latch, the timer will reset to the start position and will run thru a fill, wash, drain, short fill, drain, final fill and drain. There are 2 complete cycles in 360 degrees of rotation on the timer.
It also sounds like the motor is jammed. You may want to remove the wash arm(not an aerator) and then the part it sits on. That is called the wash arm support. Once off, you will see the wash pump impeller. See if it turns by hand. If it doesn't, then the motor is stuck and may need to re replaced.

You need to find out the story with the water supply. A WM-1D had dual fill fils, one for the wash which used building hot water and then the other one was supplied by the booster for 180 degree rinse. However, it was not unusual to see it plumbed to the booster for both wash and rinse.

 

[stevet]

Age check

Based on what I can see of the serial number, I did not hit a direct match but the machine with serial ending in 878 was built in late 1987 which should put yours not too much older that that time.

These machines used all the same pump parts and drain parts as the Kitchenaid 16 and 17 series.
They actually had the same dual strainers as the Kitchenaids when they first were built but went to a redesigned wash arm support and a single stainless steel filter.

http://https//my.hobartcorp.com/resourcecenter/ProductDocumentation/F8104%20WM1%20WM1D%20Dishwasher.pdf

 

[mikeCL]

Does the wash arm just pull right up? Good to know it uses parts from another model, that's a relief.

 

[stevet]

yes..but...

Make sure that you position the "X" so that it clears the rack supports on the side of the tank. Then just pull up by the hub not the arms and it should come out, It sounded like it was loose when you spun it.

If you want to get a feel for the spray action,look on youtube for videos of KD 15 16 or 17 series machines

 

[mikeCL]

OK got the wash arm off but the motor is locked tight.

 

[mikeCL]

Not so good news is the drain hose that connects to the drain line snapped the connection looks like corrosion.

 

[stevet]

Can you be more specific?

Pics of what and where it broke?
Start l,ooking for a kd15/16/17 motor or pump. I bet you will find one here.

 

[mikeCL]

I hope this works I'm not at home.

 

[stevet]

problem...

That part is so expensive from Hobart and only Hobart. You may want to try to solder it back together but may be better off going to a good plumbing store and take it with you and they should have something similar to it in brass, chrome or pvc. It may not be exactly like it but for all intents and purposes, this is a gravity drain machine. It can be drained into a drain line into the wall but not many homes or places are set up to line up with this setup.

 

[mikeCL]

I might try and solder it instead.. what I have a hard time finding out is removing the dishwasher from under the canbet.. I assume it's all hard lines? The booster is taking up my room from seeing what I need to see.

I think I saw a KDS-17 on youtube.. it's arms looked the same but the flow rate was impressive!

The other dishwasher we have is a kitchenaid KDI-18 That one does work, I did not get to put any dishes in it since I did not have anything to put in the dispenser.

So I assume the whole locked up motor issue is the bearing? It's not possible to free it up? It really stinks of mildew inside of the washer.

 

[stevet]

Not a bad job

to change the bearings on one of these motors.It can be done a number of ways but they all require that the motor be removed from the tank which is not all that bad.

Send me an email and I will provide you my phone number and we can discuss the whole process. Meanwhile, I will look for a parts manual for you and scan it so yu will have it at your side!
Steve

 

[mikeCL]

Hey Steve I sent you a email if I do the bearings would they be easy to find?

Also I looked a bit harder behind the limited space of the DW and I did see two lines but it's hard to say where it's going.. One of the lines comes from under the sink to the DW and the other goes to the booster.

I assume the water fill is a solenoid operated?

 

[mikeCL]

Steve here are some pictures I took yesterday.

 

[mikeCL]

The black hose is from the booster pressure relief valve.

Sorry The picture got rotated sideways

 

[mikeCL]

Will try and start unbolting the parts to get the motor out. Meanwhile try and figure out the water flow.