"Steve" wrote in message
...

Yea, this is a single screw boat and we didn't change any rotation. The
water pump
connects right to/where the distributor does so it's run off that...and we
didn't make
any changes there. ~ We did have the water pump apart, mostly because we
wanted
so see what was in there and how it worked. Basically it's two long gears
that mesh
with each other. Seems like as they spin they create a flow. I also don't
see how
the gears could have gone in backwards - or in any other way - but logically
I'm
thinking...we took the pump apart...we didn't change anything else...and now
it pumps
but in the wrong direction....we *must* have put it together wrong. Well,
just have to
get time to get down to the shop and see.

Thanks for the comments.

Gary

Gary Warner wrote:

but in the wrong direction....we *must* have put it together wrong.

That type of gear pump works by creating a low pressure area (suction)
at the center of the casing where the gears move apart. The liquid is
transported around the casing in the space between the "gear teeth" and
then displaced (discharged) as the gears mesh again on the opposite side
from the inlet.

The only thing that could have happened is that the previous owner
turned the casing around and/or plumbed the pump backwards, or you are
misinterpreting the direction of flow. Is it possible that you are
mistaken in what you believe is the correct direction of flow?

If nothing else, just go ahead and replumb the suction and discharge to
work the right way. I see it uses a collection of fittings to reverse
the direction of the piping on one side anyway ...

Rick

I believe Rick has it right. But if you are not clear on the concept,
you might read right through his explanation.
So here it is again: liquid is transported in the space between
the gear teeth (you knew that)**AND THE CASE**
not where the teeth mesh....

Brian W.

On Mon, 27 Oct 2003 23:44:25 GMT, Rick
wrote:

Gary Warner wrote:

but in the wrong direction....we *must* have put it together wrong.

That type of gear pump works by creating a low pressure area (suction)
at the center of the casing where the gears move apart. The liquid is
transported around the casing in the space between the "gear teeth" and
then displaced (discharged) as the gears mesh again on the opposite side
from the inlet.

The only thing that could have happened is that the previous owner
turned the casing around and/or plumbed the pump backwards, or you are
misinterpreting the direction of flow. Is it possible that you are
mistaken in what you believe is the correct direction of flow?

If nothing else, just go ahead and replumb the suction and discharge to
work the right way. I see it uses a collection of fittings to reverse
the direction of the piping on one side anyway ...

Rick

The way the pump is, the bottom (lower hose) should be the intake
and the top (upper hose) should be the outflow from the pump.

I think what you are saying is, "Did we put the pump on upside down?"
Hence it's pumping in the "wrong" direction. That may be a possibility.

I'll take a closer look at both how I have the pump now and the pictures
I have of it on the engine before.

Thanks for the idea.

Gary



"Brian Whatcott" wrote in message
...
I believe Rick has it right. But if you are not clear on the concept,
you might read right through his explanation.
So here it is again: liquid is transported in the space between
the gear teeth (you knew that)**AND THE CASE**
not where the teeth mesh....

Brian W.

On Mon, 27 Oct 2003 23:44:25 GMT, Rick
wrote:

Gary Warner wrote:

but in the wrong direction....we *must* have put it together wrong.

That type of gear pump works by creating a low pressure area (suction)
at the center of the casing where the gears move apart. The liquid is
transported around the casing in the space between the "gear teeth" and
then displaced (discharged) as the gears mesh again on the opposite side
from the inlet.

The only thing that could have happened is that the previous owner
turned the casing around and/or plumbed the pump backwards, or you are
misinterpreting the direction of flow. Is it possible that you are
mistaken in what you believe is the correct direction of flow?

If nothing else, just go ahead and replumb the suction and discharge to
work the right way. I see it uses a collection of fittings to reverse
the direction of the piping on one side anyway ...

Rick

Gary Warner wrote:

The way the pump is, the bottom (lower hose) should be the intake
and the top (upper hose) should be the outflow from the pump.

If the housing fits as it sits, i.e. shifts sideways to the right and
the visible mating surface with the locating pin fits on the lower
portion of the gear assembly then to make the upper hose (the one with
the two 90 degree fittings) the discharge, pump rotation should be
counter clockwise as viewed ... the right side of the right gear (the
driving gear) would be moving upward toward you so that the movement of
the gears would appear to be both turning inward toward the center of
the picture.

I hope that reads more clearly than it sounds ... 8-)

It is odd that the grease cup would be covered up by the piping though.
It doesn't look like there is much room for it ...

Rick