MemberFebruary 15, 2020 at 11:49 am
So I am running into an issue whereby my Hobart C44AW is make a noise like there is a build up of gas or that it is not keeping a consistent flame and the steady flow is being inconsistently ignited.
Earlier I was running into the dishwasher not igniting after its filled.
Seems to me that this would be a possible leakage of water onto the ignitor.
Anyone run into a gas dishwasher having this issue?
MemberFebruary 15, 2020 at 8:18 pm
So I replaced the gaskets, and now have stupid leaks that I didn’t have before.
It was previously leaking a small amount into the combustion chamber and now it is leaking all over the floor.
MemberFebruary 15, 2020 at 8:48 pm
Looking online, I see that I should have applied a sealant to the mating surfaces of the gasket and also where the screws run through the machine into the combustion chamber.
Any recommendations of sealant to be used for this purpose?
Also I see that most sealants say sets in 2 hours and cures fully in 24. Is it safe to put the machine back into operation after two hours or will that compromise the seal?
fixbear - ADK NYMemberFebruary 17, 2020 at 12:47 pm
For something like that I would use leak lock. It’s a teflon based alcohol solvent sealer. Nasty when you get it on your fingers though. Not saying that this is what Hobart recommends. Do the bolts have a flat washer under the head’s for sealing? I’ve run into applications where someone lost a washer or replaced it with a lock washer. Definately makes a leak.
MemberFebruary 17, 2020 at 2:08 pm
Alright. I will look it up.
The washers used by the previous guy that I replaced was using plastic washers.
I just picked up some bonded washers which I will be putting in once I get the gaskets from Hobart.
For whatever reason I replaced the gaskets and it still was leaking horribly.
MemberFebruary 17, 2020 at 2:13 pm
Is this what you are talking about?
fixbear - ADK NYMemberFebruary 17, 2020 at 7:00 pm
No, not a spray, but a 1.3 oz tube.of paste. It is also available in a plastic 4 oz brush lid jar.Made by High side chemical for the refrigeration industry. Available at any refrigeration supply house. Works real well with vacuum and cures quickly.
fixbear - ADK NYMemberFebruary 17, 2020 at 7:19 pm
Over the years I’ve had to use a amazing array of sealants. Starting in the early fifties with a lead base dope and string for pipe fittings. I don’t even think that todays plumbers know about the use of cotton string anymore. Today with the teflon and RTV it’s a different world. When I was exposed to Caterpillar equipment I learned a lot about sealants. Especially how they can destroy a engine if used improperly.In the mid seventies I worked on the first robots for applying sealant to valve covers instead of gaskets for Ford. Rtv is a wonderful thing if used correctly, but excess will break off and clog a oil pick-up. Cat developed a paint on rubber compound that would take up .006 inches gap and could reuse the original gasket. Time after time. We used to glue the gasket on one side with a contact cement and grease the other on assembly. When you had to open the case you just poped it off with a hit or chisel. Painted the rubber on and let it dry. Then bolt it back together. Miss having that stuff. Only available at Cat.
MemberFebruary 18, 2020 at 9:54 am
Hmmm. Interesting. Will need to order some.
Thanks for the data on that.
fixbear - ADK NYMemberFebruary 18, 2020 at 11:22 am
Don’t order larger ones. it gets thick and pasty in about 6 mouths once open.
MemberFebruary 18, 2020 at 12:49 pm
Good to know.
MemberFebruary 18, 2020 at 5:35 pm
Odd but I checked on the washer two days later and it is not leaking anymore. Hmmm.
I still need to change the seals on the conveyor drive train and replace a TMP valve which just went bad today.
Anyone ever change the seals on a conveyor drive train of a dishwasher and weigh in on what I might be running into from experience?
I have all the seals, but my predecessor inferred that it was difficult. Kinda cryptic.
MemberFebruary 20, 2020 at 8:55 am
So using the insanely price Hobart gaskets, and some bonded washers from the Home Depot the leak has been handled.
That leak caused a lot of damage to the wires in the cabinet with the high limit and I had to remake approx 6 connections, drill out a screw that was fused because all of the grounding connections became corroded, replace the ignitor, and high limit.
However after approx 6 hours, sealed, grounded, working and safe.
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