HC 16: Impossible to disassemble hulls from castings :: Catamaran Sailboats at TheBeachcats.com

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HC 16: Impossible to disassemble hulls from castings

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freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 10, 2019 - 09:26 PM

Hello Everyone icon_smile

I'm French, so please excuse my bad english...

I have a big problem: I want to replace both hulls of my old Hobie 16 with newer ones.
The Problem is that I can't disassemble the hulls from the castings icon_mad
I tried with a mallet, I tried a long time and hard (I have muscles - !).
Nothing happened.
I puted some WD40, I heatened, I even tried with a car jack... nothing happened.
None of the castins moved from the pylons.

Please help me, any ideas ???

Thanks from here for your response,
and good wind
Dogboy

Rank: Mate

Registered: Mar 19, 2004

Last visit: Nov 21, 2024

Posts: 964
Posted: Jun 11, 2019 - 05:28 AM

Did you remove the trampoline or at least loosen the tramp lacings first?

sm
carl2

Rank: Mate

Registered: Oct 13, 2003

Last visit: Sep 05, 2024

Posts: 111
Posted: Jun 11, 2019 - 07:00 AM

Are the pylons epoxied into the castings?

Edited by carl2 on Jun 11, 2019 - 07:05 AM.
carl2

Rank: Mate

Registered: Oct 13, 2003

Last visit: Sep 05, 2024

Posts: 111
Posted: Jun 11, 2019 - 07:03 AM

oops, double post

Edited by carl2 on Jun 11, 2019 - 07:05 AM.
jalex

Rank: Mate

Registered: May 08, 2013

Last visit: Oct 02, 2023

Posts: 508
Posted: Jun 11, 2019 - 07:07 AM

I used a mallet that had pellets in it, myself and a friend each took a side and hit up in unison. It took a while but started moving. When I did it by myself I made almost no progress. Be careful with the car jack!
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 07:54 AM

Thanks Carl2 and Jalex for your response !
I don't think there is epoxy.
Because it's not very common in France, and because I don't see traces
of epoxy on pylons. And I tried by heaten the castaings, in case of...

Yes I'm careful with my car jack ;)
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 07:57 AM

Thanks Carl2 and Jalex for your response !
I don't think there is epoxy.
Because it's not very common in France, and because I don't see traces
of epoxy on pylons. And I tried by heaten the castaings, in case of...

Yes I'm careful with my car jack ;)
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 08:11 AM

Thanks Carl2 and Jalex for your response !
I don't think there is epoxy.
Because it's not very common in France, and because I don't see traces
of epoxy on pylons. And I tried by heaten the castaings, in case of...

Yes I'm careful with my car jack ;)
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Jun 11, 2019 - 09:27 AM

Get a bigger mallet -
badfish

Rank: Mate

Registered: Jan 17, 2019

Last visit: Jan 13, 2020

Posts: 216
Posted: Jun 11, 2019 - 09:48 AM

carl2Are the pylons epoxied into the castings?Edited by carl2 on Jun 11, 2019 - 07:05 AM.

This would be my bet.
Something sounds off. Saltwater or freshwater boat?

--
Joshua

Texas Gulf Coast
'82 Prindle 16 (Badfish)
'02 Hobie Wave (Unnamed Project)
‘87 Hobie 18 (Sold)
‘89 Hobie 17 (ill-advised project boat, Sold)
--
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 03:21 PM

Hello again !
A bigger mallet ? are you sure MN3 ?
I even tried with a hammer drill to vibrate the castaing... no results.

Badfish: I'm quite sure that there's no epoxy. And I heatened it. So...
But you're right, it's an old saltwater boat and I'm prety sure that it was never disassembled

Thanks again for your responses and help.
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Jun 11, 2019 - 03:24 PM

QuoteI even tried with a hammer drill to vibrate the castaing... no results.

get a bigger hammer drill

Edited by MN3 on Jun 11, 2019 - 03:26 PM.
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 03:33 PM

A bigger hammer drill ?
It's completely American to want everything bigger (It's a joke )

You want to laugh ?
Today I called "Hobie Cat France" and explained my problem. A very kind and polite lady told me to read the HC16 Manual I answered her that I'm a Hobie sailor since I'm 15 (and now 50), I owned several Hobie 14 and 16 and never had so much difficult to disassemble them. To told me to send them pictures and serial number...
That why I put my truth in you, Guys...
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Jun 11, 2019 - 03:39 PM

maybe get a bigger catamaran? :)
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 03:40 PM

Nope... I have small hands and small brain
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Jun 11, 2019 - 03:42 PM

freesailsNope... I have small hands and small brain

LOL - that is funny! thanks for playing along

Sorry i can't be more helpful - my h16 was so loose i only needed to hit it with a feather to get parts to fly off
badfish

Rank: Mate

Registered: Jan 17, 2019

Last visit: Jan 13, 2020

Posts: 216
Posted: Jun 11, 2019 - 03:51 PM

MN3
freesailsNope... I have small hands and small brain

LOL - that is funny! thanks for playing along

Sorry i can't be more helpful - my h16 was so loose i only needed to hit it with a feather to get parts to fly off

Being an old saltwater boat I can only picture two things.
1-Someone applied something to join the two. JBWeld? (I'm from Texas, not sure if its as popular in France and don't know what the melting temperature would be but I've used it on engines, so....)
2-Salt has built up and made them difficult to pull apart. I think I would try boiling a pot of water (hot water dissolves salt) and slowly pouring it over the joint so that perhaps some can seep down into it. Keep working it back and forth once you can move it any.

--
Joshua

Texas Gulf Coast
'82 Prindle 16 (Badfish)
'02 Hobie Wave (Unnamed Project)
‘87 Hobie 18 (Sold)
‘89 Hobie 17 (ill-advised project boat, Sold)
--
gahamby

Rank: Mate

Registered: Feb 05, 2011

Last visit: Jun 15, 2021

Posts: 575
Posted: Jun 11, 2019 - 06:06 PM

Is the tramp removed and the dolphin striker loosened? If you can, turn the boat upside down, and put a bunch of PB Blaster in the castings. Let it soak in, repeat. Once it' had a good soak flip it back over and put the tramp frame up on saw horses. Knock down on the hulls right where they connect to the pylons with a 2x4 with some carpet or rubber padding the ends. If you can get some downward tension on the hulls with some ratchet straps attached to the horses, all the better. In all the efforts mind you don't pull a pylon out of the hull.

--
'82 Super Cat 15
Hull #315
Virginia
Previously owned: '70 H14, '79 H16, '68 Sailmaster 26, '85 H14T
--
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Jun 11, 2019 - 07:13 PM

⬆⬆⬆⬆⬆⬆⬆⬆ - what he said!

|⬇ ⬇|
freesails

Rank: Lubber

Registered: Jun 10, 2019

Last visit: Jun 11, 2019

Posts: 8
Posted: Jun 11, 2019 - 08:01 PM

Thanks, MN3

Badfish:
I think you're right: the salt is the main responsible of the difficulties. if you add some sand and dried grease... we have a strong bond between the pieces

I'll take some pictures tomorrow and send them to you.

I forgot to mention that when I saw how difficult it was, I removed the pop rivets to disassemble the front beam (and the dolphin striker. Funny name, in France we call it "martingale", used also for horses, clothes and games). I also disassembled the rear beam as well. I thought it would help if every hull was indépendant...

I didn't know PB Blaster. You know, I seriousely think you have in US more products (correct ?) than we have here in France. I neither known JBWeld, here we use mainly Araldite (epoxy resin).
I'll try to find PB Blaster here (Amazon ?) or something equivalent, I'll go to the car workshop.
Anyway, before coming on this forum, I read about lubricants. I tried to do something by mixing diluant and WD40, hoping It would penetrate.

About what you said about boiling water: I tried, but perhaps not enough... I'll try again tomorrow.
When I heatened with a "thermal cleaner" (not sure of the translation), I didn't heatened that much, because I dont want to damage the castaings.
What do you thing about it ? can I heaten much more ?

Anyway, thank you very much for your ideas and humour