After 2.5 years we got her started this weekend...
 

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

After 2.5 years we got her started this weekend...
 

"Gary Warner" wrote in message
...


PS:


The 25th picture here (on the second page) is of the water pump
when it's apart.

http://tinyurl.com/k0kk




I looked at the water pump pictures. Is it possible you assembled the center
gear housing turned end for end? It is pretty much impossible to screw it up
any other way!
Greg

After 2.5 years we got her started this weekend...
 

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

After 2.5 years we got her started this weekend...
 

"jchaplain" wrote in message
...
Wow, what a project!
Thats quite an inspirational groups of pictures you posted.
Great to see. Go for it guy!

John C.

Thanks John!

After 2.5 years we got her started this weekend...
 

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

After 2.5 years we got her started this weekend...
 

"Gary Warner" wrote in message ...
"Rob V" wrote in message
. com...
Gary - can you post some pics of the project?


Rob,

I have some pics up on Shutterfly at: http://tinyurl.com/k0kk

Tomorrow (Tues 10/28) when I get to a high speed connection I'll
add a few more including the ones from this weekend.

Thanks for asking.

Gary, very nice looking boat! What part of the country are you in?

After 2.5 years we got her started this weekend...
 

On Mon, 27 Oct 2003 17:19:31 -0500, "Gary Warner"
wrote:


"Rob V" wrote in message
.com...
Gary - can you post some pics of the project?


Rob,

I have some pics up on Shutterfly at: http://tinyurl.com/k0kk

Tomorrow (Tues 10/28) when I get to a high speed connection I'll
add a few more including the ones from this weekend.

Thanks for asking.



SAWEET old boat Gary! Keep us posted, OK?

Donny

1974 Trojan Sea Raider 25'

www.picturetrail.com/sixbennetts

http://thebayguide.com/rec.boats/donny_bennett.html

After 2.5 years we got her started this weekend...
 

The only problem was the water pump seems to be trying to pump
in the wrong direction. It's a gear pump that drives right off the
engine (no belt). I'm guessing that the two gears in there were just
put in backwards. This should be very easy to fix.

It looks like the housing is installed correctly but the gear section,
the center section, is up side down. Looking down, as you are in the
25th photo, the idler gear is on the left. To change the direction of
flow, you need the idler gear on the right keeping everything else the
same. This will move the housing to the right a little. Hope the hoses
will give you enough room.

Beautiful work!!
Beautiful boat!!
Nice job fellas!!

John 3:16

After 2.5 years we got her started this weekend...
 

As someone pointed out to me in another thread, I haven't put
any update on this problem here. So....

First, THANKS to all of you for suggestions, I really appreciate it.

Yesterday we found out what the problem was and fixed it. It
turns out that the gears in the pump can go in there two different
ways. One of the grears is driven by the shaft (call this gear A)
and the other (Gear B) is just driven off of Gear A.

The drive gear (A) can either be either above or below the
other (B) gear. When it's on top it pumps one way (the
way we need it to) and when on the bottom it pumps in
the other direction.

I believe the reason for this is....on twin engine boats they
use two of the same engine, but one engine rotates in the
opposite direction. With the pump set-up this way, they
can use the same pump on either engine...just flip the
gears around.

Why we made the mistake: With the way our pump
NEEDS to be, the writing that is cast into the part is
upside-down. But when we put the pump back together
we, quite naturally, figured that the writing should be
right-side-up. Not so.

If that doesn't make sense or anyone wants a picture
describing all this...send me an email and I'll mail you
an MS-Word document that has pictures (and circiles
and arrows and a paragraph on the back of each one,
kid.)

Again, THANKS,
Gary


"Gary Warner" wrote in message
...

As many of you know, we've been working for the last 2+ years
on Delilah, our 1958 22' Chris-Craft. She still hasn't seen the water
but on Saturday we started the engine for the first time. That was
a big milestone after having had the engine out, putting in some
new valves, having the carb, water pump, head, and "everything else"
all apart. She started right up and purred beautifully.

The only problem was the water pump seems to be trying to pump
in the wrong direction. It's a gear pump that drives right off the
engine (no belt). I'm guessing that the two gears in there were just
put in backwards. This should be very easy to fix.

Last week we also ordered our axels and such, so in a few weeks we
can start making a trailer. We though we'd have her in this year...but
now it really looks like NEXT year we can finally have some fun on the
water.

Thanks for all the help I've received here!!
Gary

After 2.5 years we got her started this weekend...
 

Lookin Good Gary! Who did the re-chrome. It looks really good!

I did a little boating myself this day. It was great to get away from
the dock for a change.

Capt. Frank

www.home.earthlink.net/~aartworks

Gary Warner wrote:

PS:


The 25th picture here (on the second page) is of the water pump
when it's apart.

http://tinyurl.com/k0kk