Paul on sun 4 jul 04
I had to replace the bearing hub assembly in a Pacifica gt-400 wheel,
which requires taking off the wheel head as well as the pulley below it.
Seemed like it would just be a matter of taking out the set screws and
turning it a bit while pulling up on it, but this was not the case.
Basically, I have concluded that it is absolutely impossible to remove
the wheel head. I have tried liquid wrench, letting it soak over night
and then taking the whole top part of the wheel off and putting the main
shaft in a bench vise, and then held the wheel head and pulled up on it
while turning it back and forth for a long time, and It did not move up
at all.=20
Has anyone out there had to deal with this, and if so, do you have any
advice on how I could remove this wheel head? I know someone who works
at a machine shop but I don't even know what kind of tools they would
have that could do this without damaging the wheel head. I would be very
thankful for any advice out there. Sergio from Laguna was nice enough
but the only suggestions he had were to do what I just mentioned, and it
did not work. Thanks!
Paul B
Falmouth, Ky
Jennifer Buckner on sun 4 jul 04
At 01:21 AM 7/4/2004, Paul B. of KY wrote:
>I had to replace the bearing hub assembly in a Pacifica gt-400 wheel,
>................do you have any
>advice on how I could remove this wheel head?
> .........Sergio from Laguna was nice enough
>but the only suggestions he had were to do what I just mentioned, and it
>did not work.
Paul,
I've been told by my supplier, Sheffield Pottery, where I bought my
Pacifica, that there is a maintenance and repair video for Pacifica
wheels. Sheffield apparently called Laguna on my behalf to ask them to
send me one. This was months ago and I've yet to receive it.
However, perhaps you'd have better luck if you ask your Laguna contact,
Sergio, about getting a copy.
Jennifer (Champlain Islands VT)
Jennifer G. Buckner jenniverre@earthlink.net
John Jensen on sun 4 jul 04
I have faced your predicament once or twice. Sorry to say I don't have
an easy answer; but a couple of suggestions. There might be some better
penetrating oils worth trying...check with your auto parts store.
Sometimes it takes several days of constant application to get the
lubricant to penetrate. As I recall, I had success using a hammer and
hitting the wheel head near the shaft. Also consider heating the
aluminum wheel head with a propane torch, it might expand enough to
release. Good luck! Be persistent.
John Jensen, Mudbug Pottery
mudbug@toadhouse.com , http://www.toadhouse.com
-----Original Message-----
Subject: NEED HELP WITH LAGUNA PACIFIC WHEEL
I have concluded that it is absolutely impossible to remove
the wheel head. I have tried liquid wrench, letting it soak over night
and then taking the whole top part of the wheel off and putting the main
shaft in a bench vise, and then held the wheel head and pulled up on it
while turning it back and forth for a long time, and It did not move up
at all.=20
Has anyone out there had to deal with this, and if so, do you have any
advice on how I could remove this wheel head? Falmouth, Ky
Donald G. Goldsobel on sun 4 jul 04
When I had to do the same repair with my old Brent C, i found that the wheel
head is pressed on at the factory and the whole assembly needs to be
replaced- more $$$. I ordered the part and it was in fact the whole
assembly, not the pulley, but the shaft, bearing and wheel head. So I used
the old assemply for a turntable.
Donald
Malcolm Schosha on sun 4 jul 04
Paul,
There are three methods of mounting wheel heads to the shaft that I
have seen. The most common are set screws and taper fit. With these,
even with a set screw, it takes a few sharp raps from underneath to
get the head loose. The third type is a screw fit, but I don't
remember see that aside from on some Italian wheels.
Malcolm Schosha
--- In clayart@yahoogroups.com, Paul wrote:
> I had to replace the bearing hub assembly in a Pacifica gt-400
wheel,
> which requires taking off the wheel head as well as the pulley
below it.
> Seemed like it would just be a matter of taking out the set screws
and
> turning it a bit while pulling up on it, but this was not the case.
> Basically, I have concluded that it is absolutely impossible to
remove
> the wheel head. I have tried liquid wrench, letting it soak over
night
> and then taking the whole top part of the wheel off and putting the
main
> shaft in a bench vise, and then held the wheel head and pulled up
on it
> while turning it back and forth for a long time, and It did not
move up
> at all.
>
> Has anyone out there had to deal with this, and if so, do you have
any
> advice on how I could remove this wheel head? I know someone who
works
> at a machine shop but I don't even know what kind of tools they
would
> have that could do this without damaging the wheel head. I would be
very
> thankful for any advice out there. Sergio from Laguna was nice
enough
> but the only suggestions he had were to do what I just mentioned,
and it
> did not work. Thanks!
>
> Paul B
>
> Falmouth, Ky
>
>
______________________________________________________________________
________
> Send postings to clayart@l...
>
> You may look at the archives for the list or change your
subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@p...
John Jensen on sun 4 jul 04
If the repair and maintenance video is the same as the one I have, it
won't be of any help. In that video, for example (as I recall), the
wheelhead just lifts of with a gentle tap.
John Jensen, Mudbug Pottery
mudbug@toadhouse.com , http://www.toadhouse.com
Original message......
do you have any
>advice on how I could remove this wheel head?
> .........Sergio from Laguna was nice enough
>but the only suggestions he had were to do what I just mentioned, and
it
>did not work.
Paul,
I've been told by my supplier, Sheffield Pottery, where I bought my
Pacifica, that there is a maintenance and repair video for Pacifica
wheels. Sheffield apparently called Laguna on my behalf to ask them to
send me one. This was months ago and I've yet to receive it.
Craig Dunn Clark on sun 4 jul 04
Paul, about two years back I not only replaced the bearings but the
particle board (that's whats under the plastic on some of the models) deck
as well. It wasn't all that difficult. David Hendley has also replaced the
bearing on his much older wheel as well.
What I discovered after a whole bunch of cussing was that upon closer
inspection there are TWO set screws that hold the wheel head to the shaft on
my 800 model, circa 1995. I had removed one of them, thought the wheel head
was supposed to come loose, and wasn't able to get it to do so. Lukly I did
not pound on it any, I was just gentley prying it before I remembered that
David had fixed his so I gave him a call. Said that there are two set screws
in the same hole. One on top of the other. The second serves the purpose of
keeping the first from backing out on it's own.
Don't know if they are still making them the same way or not. I do know
that the newer ones have better foot pedals, cast aluminum versus plasitc,
but not sure about the rest. If their tech support can't give you any more
help than you have reported check for that second set screw. If that isn't
the problem, and your sure the wheel head should be able to break free try
turning the whole thing over, with the legs sticking up, and put a bit of
the slovent of your choice to dissolve the corrossion that has formed
between the shaft and the wheel head. Do this several times. Be patient.The
shaft is steel and the wheel head is aluminum so there is the problem of a
reaction between the disimilar metals over time.
After that try GENTLY tapping around the rim with a RUBBER mallet. As
you do this try prying, once again, GENTLY, the wheel head just a little by
using a lever and appropriatly place fulcrum between the base of the wheel
head where it meets the shaft and the top or the deck of the wheel. Work
around slowly and very gently. Tapping..gently and slowly.
Hope this helps
If you have any more questions give me a call
Craig Dunn Clark
619 East 11 1/2 st
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
----- Original Message -----
From: "Jennifer Buckner"
To:
Sent: Sunday, July 04, 2004 5:46 AM
Subject: Re: NEED HELP WITH LAGUNA PACIFIC WHEEL
> At 01:21 AM 7/4/2004, Paul B. of KY wrote:
> >I had to replace the bearing hub assembly in a Pacifica gt-400 wheel,
> >................do you have any
> >advice on how I could remove this wheel head?
>
> > .........Sergio from Laguna was nice enough
> >but the only suggestions he had were to do what I just mentioned, and it
> >did not work.
>
>
> Paul,
>
> I've been told by my supplier, Sheffield Pottery, where I bought my
> Pacifica, that there is a maintenance and repair video for Pacifica
> wheels. Sheffield apparently called Laguna on my behalf to ask them to
> send me one. This was months ago and I've yet to receive it.
>
> However, perhaps you'd have better luck if you ask your Laguna contact,
> Sergio, about getting a copy.
>
> Jennifer (Champlain Islands VT)
>
> Jennifer G. Buckner jenniverre@earthlink.net
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
John Jensen on sun 4 jul 04
On second thought: I think last time I took a stuck wheel head off a
Pacifica, the bearings were still mounted on the frame. I used two
crowbars, one on each side, to pry it upward. It took many attempts
accompanied with liberal hammer blows on the wheel and crowbars to shock
the (%%&@$)&*^& into compliance. I used blocks of wood both to spread
the load and to get the crowbars into the best angle. I was concerned
about warping the wheelhead, but it didn't happen.
John Jensen, Mudbug Pottery
mudbug@toadhouse.com , http://www.toadhouse.com
Michael Wendt on sun 4 jul 04
Aluminum has an expansion coefficient of
12.5 x 10 ^-6/ degree F
Steel has an expansion coefficient of
6.6 x 10^ -6/ degree F
Also, if you construct an ice water bath
to stand the steel shaft in while GENTLY
and uniformly heating the aluminum part,
by the time the aluminum part is a few hundred
degrees F hotter than the shaft, it will be much
larger and we HOPE it will come off.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, Idaho 83501
USA
wendtpot@lewiston.com
www.wendtpottery.com
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