Vacuum sealer maintenance anyone?


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Old 12-21-21, 04:55 PM
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Vacuum sealer maintenance anyone?

Hey Gang,

I'm wondering if anyone has experienced this and if you might have any insight into the problem. I have an Omcan MT500 vac sealer. I've been using for a few years and it has always worked perfectly giving me upwards of ~ neg 0.8 bar of suction. A few days ago I was packaging up some recently cured soppressata and nearing the end the unit would suddenly not go beyond ~ neg 0.3 bar.

I popped the housing off and everything looks pristine. While running if I put my finger over the suction hole it does jump to neg 0.7 ~ I would think this would indicate a gasket leak, but they look perfect.... and I put new gaskets in with the same result... So for anyone with experience here a few questions if I might;

Is it possible for gaskets that look perfect suddenly fail and leak somehow?

The leak may be under the gaskets. Is anyone aware of a removable gasket sealer/adhesive that I could seal the gaskets in their channels?

Anything else you think it might be? I use it fairly regularly but this is a higher end unit so I can't see that the pump is shot... the piston appears to be moving fine. I was wondering if the pistons could ever benefit from lubrication but this is an oil free unit.

Thanks all


 
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Old 12-21-21, 07:06 PM
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I don't know that unit to recommend a repair. Have you checked with Omcan for a solution ?
Based on my unit I know the gaskets are very important.
Some places recommend a light oil coating (salad oil.... not motor oil).
I don't think the gaskets get sealed in place.

Typically vacuum pumps have four carbon vanes and cannot be lubricated.
When you cover the suction hole(s) you get a high vacuum which means the pump should be ok.

Parts and technical service
Manual and parts list -pdf
 
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Old 12-21-21, 07:54 PM
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@pjmax - Thanks as always for your dedication here.

OK, I did check with Omcan.... They will offer parts but not advice... Even in my native Italian! LoL! This unit is Italian made

I'm curious about your oil suggestion... I was thinking air tool oil.... but a dab on the cylinder?

Bottom line is this thing was sucking HARD... now it's not as strong as a dirt devil.... Something suddenly got weak...

I wonder if there's not something equivalent to a piston ring in there that I blew when sealing loads of salami?


 
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Old 12-21-21, 08:26 PM
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I can't find any details or pictures of the actual motor/pump assembly. It's called an oil less vacuum pump. If it does use carbon vanes like most vacuum pumps.... getting oil on the vanes will ruin them. They must remain dry. I'm seeing some small diaphragm type pumps too.

This picture is in the parts listing. Don't know if it's an actual or representative picture.
Hard to tell construction of it.

 
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Old 12-21-21, 09:58 PM
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@pjmax - here's the breakdown manual

They have a better than overseas overview.
 
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