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UK Caravanning (uk.rec.caravanning) A forum for the discussion of caravanning undertaken by residents of the United Kingdom, whether in the UK or abroad. It encourages the interchange of views on the merits of models of caravan, makes of tow car, accessories, caravan sites, caravan clubs, and other related topics. The term caravan is to include trailer vans, motor caravans and trailer tents.

Locked on brake!



 
 
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  #1 (permalink)  
Old August 8th 03, 03:29 PM posted to uk.rec.caravanning
Harry Bloomfield
external usenet poster
 
Posts: 582
Default Locked on brake!

Hi,

I have just got back home from a few days away in the van. Truly
splendid weather, but it didn't go without incident. On trying to pull
away from the pitch, one of the van wheels would not turn, so the first
assumption was the shoes had jammed in the on position against the
drum. Lots of banging on the drum would not shift, so it was off with
the wheel then try to remove the drum. Once the outer bearing was
removed I was able to waggle and tap the drum enough to free it off, so
off I went....

I got within a few miles of home, when a hard-ish application of the
brakes locked the same wheel up solidly again. So I decided to leave it
there and nip home for some serious tools to have a proper look at it.

It turned out to be not the shoes sticking, but the Bowden cable from
the drum to the brake rod/compensator(?), one for each wheel. The cable
looked perfect, no rust at all on the inner, no damage on the outer and
I had carefully cleaned, serviced and greased it all, just a few months
ago. But I did not take off these cables to check they were absolutely
free. I tried pumping oil down the cable, but it didn't help at all, so
I went chasing around the UK on the phone, trying to urgently find a
new cable.

I think I was very lucky to track down a replacement cable just a
couple of miles from home and managed to tow the van home soon
afterwards.

Now to leisurely check out the second cable....

--
Regards,
Harry (M1BYT)...

Remove the 'NOSPAM' in my email address to reply.

Free Amateur Radio Courses:-
http://www.ukradioamateur.org
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  #2 (permalink)  
Old August 8th 03, 06:43 PM posted to uk.rec.caravanning
Tony Maris
external usenet poster
 
Posts: 161
Default Locked on brake!

Hello Harry,

Unless the Bowden cable has a grease nipple half way down it (unusual on a
caravan) they are nylon lined and do not need lubricating. I am very much
against it anyway as pumping grease in the nipple will simply fill the brake
drum!

Usually when a cable is about to fail, there would be tell tale cracking in
the black outer sheath or it would be kinked, usually immediately next to
either of the metal fittings at either end. It could, of course, be
possible that you have simply worn the inner nylon lining away but there is
no way to see this. All you could do is (with the linkage disconnected,
ensure that the inner is free to slide backwards and forwards.

Regards

--
Tony M
Towbars & Trailers
Chesterfield
Specialists in Towing Equipment
NTTA Council Member
http://www.towitall.co.uk
QSA accredited for Towbars and Trailers



"Harry Bloomfield" wrote in message
t...
Hi,

I have just got back home from a few days away in the van. Truly
splendid weather, but it didn't go without incident. On trying to pull
away from the pitch, one of the van wheels would not turn, so the first
assumption was the shoes had jammed in the on position against the
drum. Lots of banging on the drum would not shift, so it was off with
the wheel then try to remove the drum. Once the outer bearing was
removed I was able to waggle and tap the drum enough to free it off, so
off I went....

I got within a few miles of home, when a hard-ish application of the
brakes locked the same wheel up solidly again. So I decided to leave it
there and nip home for some serious tools to have a proper look at it.

It turned out to be not the shoes sticking, but the Bowden cable from
the drum to the brake rod/compensator(?), one for each wheel. The cable
looked perfect, no rust at all on the inner, no damage on the outer and
I had carefully cleaned, serviced and greased it all, just a few months
ago. But I did not take off these cables to check they were absolutely
free. I tried pumping oil down the cable, but it didn't help at all, so
I went chasing around the UK on the phone, trying to urgently find a
new cable.

I think I was very lucky to track down a replacement cable just a
couple of miles from home and managed to tow the van home soon
afterwards.

Now to leisurely check out the second cable....

--
Regards,
Harry (M1BYT)...

Remove the 'NOSPAM' in my email address to reply.

Free Amateur Radio Courses:-
http://www.ukradioamateur.org



  #3 (permalink)  
Old August 8th 03, 08:35 PM posted to uk.rec.caravanning
Harry Bloomfield
external usenet poster
 
Posts: 582
Default Locked on brake!

In article ,
says...
| Hello Harry,
|
| Unless the Bowden cable has a grease nipple half way down it (unusual on a
| caravan) they are nylon lined and do not need lubricating. I am very much
| against it anyway as pumping grease in the nipple will simply fill the brake
| drum!
|
| Usually when a cable is about to fail, there would be tell tale cracking in
| the black outer sheath or it would be kinked, usually immediately next to
| either of the metal fittings at either end. It could, of course, be
| possible that you have simply worn the inner nylon lining away but there is
| no way to see this. All you could do is (with the linkage disconnected,
| ensure that the inner is free to slide backwards and forwards.

Thanks Tony,

As suggested there was not a mark on the cable to indicate any
problems. Once out on the bench, it would only move an inch or so
around the area it normally moved in and would jam on any attempt to
move it any further. My own guess would be the inner liner breaking up.
Perhaps faulty manufacture, rather than wear and tear, because the van
seems to have done very little mileage.

I have just completed stripping out and refitting the second one, which
really is free to move from end to end of its travel, just as it
should.
 



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