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Cascade II transplant. Help! I've got a leak!



 
 
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  #1 (permalink)  
Old August 6th 05, 07:21 PM posted to uk.rec.caravanning
David Thornber
external usenet poster
 
Posts: 47
Default Cascade II transplant. Help! I've got a leak!

The history: At present, I have two caravans - one I'm getting rid of,
that had a Carver Cascade II GE, and one I've just bought that has the
standard, gas only Cascade II. We tried running on gas for a week, but
really missed having the electric option.

I've now swapped the two heaters over, but the GE in the 'new' caravan
seems to have a leak. I think this is because it's now running on a
pressure switch system rather than a microswitch one, meaning that the
tank is under constant pressure. I now have a small bead of water
collecting between the wall and the floor inside the locker, which is
finding its way through to the outside of the caravan and soaking the
underside of the floor. I've taken the pressure off it for now (turned
off the pump and opened the hot tap) but obviously I need to get this
sorted fairly urgently.

The hose jubilee clips are as tight as I dare to twist them, and don't
appear to be losing any water. I found a wet streak on the top of the
plastic burner control housing, so I think it's coming from the tank
seal. I believe these (and other Cascade II) parts aren't widely
available these days, but vaguely recall there being a specialist
company that carried on making them. Does anyone have any details of
where I can get replacement seals? And just how difficult are they to
fit? And one last thing: Does the whole flamin' lot have to come out
again, or is there any way I can do it in situ?
--
David Thornber
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  #2 (permalink)  
Old August 6th 05, 08:32 PM posted to uk.rec.caravanning
David @ Home
external usenet poster
 
Posts: 185
Default Cascade II transplant. Help! I've got a leak!


"David Thornber" wrote in message
news:[email protected] eranews...
The history: At present, I have two caravans - one I'm getting rid of,
that had a Carver Cascade II GE, and one I've just bought that has the
standard, gas only Cascade II. We tried running on gas for a week, but
really missed having the electric option.

I've now swapped the two heaters over, but the GE in the 'new' caravan
seems to have a leak. I think this is because it's now running on a
pressure switch system rather than a microswitch one, meaning that the
tank is under constant pressure. I now have a small bead of water
collecting between the wall and the floor inside the locker, which is
finding its way through to the outside of the caravan and soaking the
underside of the floor. I've taken the pressure off it for now (turned
off the pump and opened the hot tap) but obviously I need to get this
sorted fairly urgently.

The hose jubilee clips are as tight as I dare to twist them, and don't
appear to be losing any water. I found a wet streak on the top of the
plastic burner control housing, so I think it's coming from the tank
seal. I believe these (and other Cascade II) parts aren't widely
available these days, but vaguely recall there being a specialist
company that carried on making them. Does anyone have any details of
where I can get replacement seals? And just how difficult are they to
fit? And one last thing: Does the whole flamin' lot have to come out
again, or is there any way I can do it in situ?
--
David Thornber


Its the whole lot out again, I'm afraid. The seals are available, no
problem. The big one comes on its own, the small one for the other end of
the rod comes with a new washer. I don't think your problem is a change from
microswitch to pressurised. The increase in pressure from heating the water
is far greater than that produced by the pump. You shouldn't need to have
the jubilee clip on the inlet overtight. There is/ should be a non return
valve in the inlet pipe. If you tighten it too much you can deform the inlet
and stop the non return valve working.

Cheers

David


  #3 (permalink)  
Old August 6th 05, 08:32 PM posted to uk.rec.caravanning
David @ Home
external usenet poster
 
Posts: 185
Default Cascade II transplant. Help! I've got a leak!


"David Thornber" wrote in message
news:[email protected] eranews...
The history: At present, I have two caravans - one I'm getting rid of,
that had a Carver Cascade II GE, and one I've just bought that has the
standard, gas only Cascade II. We tried running on gas for a week, but
really missed having the electric option.

I've now swapped the two heaters over, but the GE in the 'new' caravan
seems to have a leak. I think this is because it's now running on a
pressure switch system rather than a microswitch one, meaning that the
tank is under constant pressure. I now have a small bead of water
collecting between the wall and the floor inside the locker, which is
finding its way through to the outside of the caravan and soaking the
underside of the floor. I've taken the pressure off it for now (turned
off the pump and opened the hot tap) but obviously I need to get this
sorted fairly urgently.

The hose jubilee clips are as tight as I dare to twist them, and don't
appear to be losing any water. I found a wet streak on the top of the
plastic burner control housing, so I think it's coming from the tank
seal. I believe these (and other Cascade II) parts aren't widely
available these days, but vaguely recall there being a specialist
company that carried on making them. Does anyone have any details of
where I can get replacement seals? And just how difficult are they to
fit? And one last thing: Does the whole flamin' lot have to come out
again, or is there any way I can do it in situ?
--
David Thornber


Its the whole lot out again, I'm afraid. The seals are available, no
problem. The big one comes on its own, the small one for the other end of
the rod comes with a new washer. I don't think your problem is a change from
microswitch to pressurised. The increase in pressure from heating the water
is far greater than that produced by the pump. You shouldn't need to have
the jubilee clip on the inlet overtight. There is/ should be a non return
valve in the inlet pipe. If you tighten it too much you can deform the inlet
and stop the non return valve working.

Cheers

David


  #4 (permalink)  
Old August 6th 05, 08:51 PM posted to uk.rec.caravanning
Bob Douglas
external usenet poster
 
Posts: 275
Default Cascade II transplant. Help! I've got a leak!

"David Thornber" wrote in message
news:[email protected] eranews...

snip

I found a wet streak on the top of the
plastic burner control housing, so I think it's coming from the tank seal.
I believe these (and other Cascade II) parts aren't widely available these
days, but vaguely recall there being a specialist company that carried on
making them. Does anyone have any details of where I can get replacement
seals? --
David Thornber


If you need spares, try www.olearymotorhomes.co.uk - they bought a job lot
when Truma bought Carver out, and are still listing them (including seals).

www.caravanparts.net for the 'Henry GE' a 'same fit' replacement, with many
parts compatible (so may be able to supply seal)

Bob

--
00000000000000000000000000000000000000000000000000 00
Antispam measures in force - remove nobumf from address to reply
00000000000000000000000000000000000000000000000000 00


  #5 (permalink)  
Old August 6th 05, 08:51 PM posted to uk.rec.caravanning
Bob Douglas
external usenet poster
 
Posts: 275
Default Cascade II transplant. Help! I've got a leak!

"David Thornber" wrote in message
news:[email protected] eranews...

snip

I found a wet streak on the top of the
plastic burner control housing, so I think it's coming from the tank seal.
I believe these (and other Cascade II) parts aren't widely available these
days, but vaguely recall there being a specialist company that carried on
making them. Does anyone have any details of where I can get replacement
seals? --
David Thornber


If you need spares, try www.olearymotorhomes.co.uk - they bought a job lot
when Truma bought Carver out, and are still listing them (including seals).

www.caravanparts.net for the 'Henry GE' a 'same fit' replacement, with many
parts compatible (so may be able to supply seal)

Bob

--
00000000000000000000000000000000000000000000000000 00
Antispam measures in force - remove nobumf from address to reply
00000000000000000000000000000000000000000000000000 00


  #6 (permalink)  
Old August 6th 05, 09:03 PM posted to uk.rec.caravanning
David Thornber
external usenet poster
 
Posts: 47
Default Cascade II transplant. Help! I've got a leak!

In message , "David @ Home"
writes
Its the whole lot out again, I'm afraid. The seals are available, no
problem. The big one comes on its own, the small one for the other end of
the rod comes with a new washer. I don't think your problem is a change from
microswitch to pressurised. The increase in pressure from heating the water
is far greater than that produced by the pump. You shouldn't need to have
the jubilee clip on the inlet overtight. There is/ should be a non return
valve in the inlet pipe. If you tighten it too much you can deform the inlet
and stop the non return valve working.

Hi David! Thanks for bailing me out yet again!

I think it must have been leaking in the old 'van for a while then, but
probably only when the tank was heating up. It looks like the pressure
switched system has highlighted the fault by trying to maintain the
pressure, even when the taps are turned off.

I'll see if I can get a seal kit tomorrow, then out the critter comes
again, though it was pretty straightforward as you said it would be.
The most awkward part was cleaning up and re-applying the mastic (I hate
that stuff.) Seeing as it's fresh and still very gooey, I reckon I
should get away with leaving the existing mastic on and just adding a
bit extra to compensate for the fact that it's already been 'squished.'

Cheers!
--
David Thornber
  #7 (permalink)  
Old August 6th 05, 09:03 PM posted to uk.rec.caravanning
David Thornber
external usenet poster
 
Posts: 47
Default Cascade II transplant. Help! I've got a leak!

In message , "David @ Home"
writes
Its the whole lot out again, I'm afraid. The seals are available, no
problem. The big one comes on its own, the small one for the other end of
the rod comes with a new washer. I don't think your problem is a change from
microswitch to pressurised. The increase in pressure from heating the water
is far greater than that produced by the pump. You shouldn't need to have
the jubilee clip on the inlet overtight. There is/ should be a non return
valve in the inlet pipe. If you tighten it too much you can deform the inlet
and stop the non return valve working.

Hi David! Thanks for bailing me out yet again!

I think it must have been leaking in the old 'van for a while then, but
probably only when the tank was heating up. It looks like the pressure
switched system has highlighted the fault by trying to maintain the
pressure, even when the taps are turned off.

I'll see if I can get a seal kit tomorrow, then out the critter comes
again, though it was pretty straightforward as you said it would be.
The most awkward part was cleaning up and re-applying the mastic (I hate
that stuff.) Seeing as it's fresh and still very gooey, I reckon I
should get away with leaving the existing mastic on and just adding a
bit extra to compensate for the fact that it's already been 'squished.'

Cheers!
--
David Thornber
  #8 (permalink)  
Old August 10th 05, 12:30 PM posted to uk.rec.caravanning
David Thornber
external usenet poster
 
Posts: 47
Default Cascade II transplant. Help! I've got a leak!

In message , Bob Douglas
writes
If you need spares, try www.olearymotorhomes.co.uk - they bought a job lot
when Truma bought Carver out, and are still listing them (including seals).

www.caravanparts.net for the 'Henry GE' a 'same fit' replacement, with many
parts compatible (so may be able to supply seal)

Bob

Sorry for the delay in replying and thanks for the leads.

I tried to source some seals locally but drew a blank. In the end, I'm
ordering some from Gary at Arc Systems (www.arcsystems.biz). What he
doesn't know about the Cascade II isn't worth knowing, and he has the
patience of a saint when dealing with numpties like me who are going
into this semi-clueless.

At the moment, the heater isn't leaking! I took it out to make sure
that the problem was the seal rather than a misaligned tank (a
possibility, considering that the heater had been moved.) The tank
alignment looked good, but so did the seal, though there was some dirt
where it met the casting and the rim of the tank. On the off-chance
that it'd work, I gently cleaned the seal and the areas that it made
contact with, then put the whole thing back together. I've filled it,
heated it up to 65 degrees on gas, and again on electricity, and haven't
spotted any leaks yet (touch wood!)

I'll still be ordering new seals, as it's apparently a bad idea to refit
the tank without using new ones, and it's almost certain to start
leaking again sooner or later unless I do. But if it'll get us through
the August bank holiday weekend without event, I'll be happy, and I'll
take the spare set with me just in case.
--
David Thornber
  #9 (permalink)  
Old August 10th 05, 12:30 PM posted to uk.rec.caravanning
David Thornber
external usenet poster
 
Posts: 47
Default Cascade II transplant. Help! I've got a leak!

In message , Bob Douglas
writes
If you need spares, try www.olearymotorhomes.co.uk - they bought a job lot
when Truma bought Carver out, and are still listing them (including seals).

www.caravanparts.net for the 'Henry GE' a 'same fit' replacement, with many
parts compatible (so may be able to supply seal)

Bob

Sorry for the delay in replying and thanks for the leads.

I tried to source some seals locally but drew a blank. In the end, I'm
ordering some from Gary at Arc Systems (www.arcsystems.biz). What he
doesn't know about the Cascade II isn't worth knowing, and he has the
patience of a saint when dealing with numpties like me who are going
into this semi-clueless.

At the moment, the heater isn't leaking! I took it out to make sure
that the problem was the seal rather than a misaligned tank (a
possibility, considering that the heater had been moved.) The tank
alignment looked good, but so did the seal, though there was some dirt
where it met the casting and the rim of the tank. On the off-chance
that it'd work, I gently cleaned the seal and the areas that it made
contact with, then put the whole thing back together. I've filled it,
heated it up to 65 degrees on gas, and again on electricity, and haven't
spotted any leaks yet (touch wood!)

I'll still be ordering new seals, as it's apparently a bad idea to refit
the tank without using new ones, and it's almost certain to start
leaking again sooner or later unless I do. But if it'll get us through
the August bank holiday weekend without event, I'll be happy, and I'll
take the spare set with me just in case.
--
David Thornber
 



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