I finished with my crayon for the Rubber seals with an Embeded
Differential. Sorry I don't have great Paint or Photoshop skills. I
was always really crappy at art!
http://ph.groups.yahoo.com/group/papercreters/photos/view/8777?b=6
The key difference from the flush mount is that the hole in the
bottom of the tank is huge. A large chunk of the differential
housing sticks up through the tank. Bondo has been the typical
system to seal this up, but results have been reported as sketchy.
I propose another UNTESTED idea.
Create a sheet metal shroud to cover the portion of the differential
that is sticking up through the tank. This shroud will need to have
a flange flaring out from the base so that it can get sandwiched with
large rubber ring seals made from recycled innertube rubber.
Large reinforcement rings inside and outside the tank act like big
fender washers keeping everything strong. There should be MORE than
2 bolts holding it down. The bolts should go all the way around the
differential, maybe about 2 inch spacing or so.
Keep in mind that neither the rubber nor the shroud is actually
supporting the tank. The tank gets supported by the trailer frame.
--- In papercreters@yahoogroups.com, "slurryguy" <slurryguy@...>
wrote:
>
> Okay, you asked for it...
>
> Here's a completely UNTESTED idea for sealing the differential at
the
> bottom of a tow mixer tank.
>
> The key is to have the tank mounted high enough that the face plate
> at the business end of the differential is flush with the bottom of
> the tank. There may need to be some kind of shaft extension.
>
> http://ph.groups.yahoo.com/group/papercreters/photos/view/8777?b=5
>
> The rubber seals shown in the diagram are recycled innertube.
>
> The fender washers can be custom made from any chunk of steel or
> aluminum.
>
> The basic idea is to sandwich a rubber seals between strong metal
> plates (fender washers). The hole size in the fender washer should
> be as small as reasonable while not dragging on the shaft.
>
> The hole size in the Rubber Seals should fit very snugly around the
> shaft. Don't be afraid to lubricate the rubber to get it installed.
>
> I have another similar idea for a differential that is not flush
> mounted to the bottom of the tank. I'll post about it in a second
> post and make a second diagram.
>
>
>
> --- In papercreters@yahoogroups.com, "Nick Boersema" <picknick@>
> wrote:
> >
> > Keep posting these ideas. One of the reasons I have been
stalling
> is
> > because although I now have most everything for my tow mixer I
> don't really
> > like the concept of the deferential seal at the bottom of the
tank
> and felt
> > I could do better but just had yet to decide which way to go. I
> like this
> > latest idea very much post some pictures of these pumps if you go
> look at
> > them.
> >
> >
> >
> > SG I get great ideas even from your rare half back ones so keep
em
> coming.
> > :-)
> >
> >
> >
> > Nick
> >
> >
>
------------------------------------
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