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Cobra trailer brake heating up



 
 
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  #11  
Old August 13th 18, 10:51 PM posted to rec.aviation.soaring
JS[_5_]
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Posts: 624
Default Cobra trailer brake heating up

On Monday, August 13, 2018 at 11:44:43 AM UTC-7, wrote:
Bumping this thread to see what Eric found last year.

My Cobra brake jammed on after a hard stop on the way home from Midlothian last week. Couldn't free it up so disconnected the brake cables at the center brake rod. That freed up the wheels immediately so I drove home. Seemed to stay jammed until I came up the steep driveway. Now it's free, with no indication what might have been wrong. The inner sliding tube and bushings were lubed and moved freely. The brakes and cables were fine; the wheels turned freely after I disconnected the cables even though the tongue was still jammed in the collapsed position.

One odd thing: the lever that comes out of the lower part of the tongue that pulls the brake rod couldn't be tapped loose. No surprise since the inner tube was fully collapsed and thus actuating this lever. But on the way home, I stopped again: tongue was still collapsed but this time when I tapped the lever, it came loose and moved freely. I'm just getting into it now to see what might be amiss but has anyone had this problem?

Chip Bearden


Chip:
Are you sure there isn't a bullet jammed in it?
Jim
  #12  
Old August 13th 18, 10:54 PM posted to rec.aviation.soaring
[email protected]
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Posts: 580
Default Cobra trailer brake heating up

Are you sure there isn't a bullet jammed in it?
Jim


Hahaha! Anything is possible.
  #13  
Old August 13th 18, 10:59 PM posted to rec.aviation.soaring
JS[_5_]
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Posts: 624
Default Cobra trailer brake heating up

On Monday, August 13, 2018 at 2:54:13 PM UTC-7, wrote:
Are you sure there isn't a bullet jammed in it?
Jim


Hahaha! Anything is possible.


That one particularly possible after the "Dallas" TV show remake...
With the big mystery "Who shot JB?"
Jim
  #14  
Old August 14th 18, 01:32 AM posted to rec.aviation.soaring
Michael Opitz
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Posts: 318
Default Cobra trailer brake heating up

At 18:44 13 August 2018, wrote:
Bumping this thread to see what Eric found last year.

My Cobra brake jammed on after a hard stop on the way home

from Midlothian
=
last week. Couldn't free it up so disconnected the brake cables at

the
cent=
er brake rod. That freed up the wheels immediately so I drove

home. Seemed
=
to stay jammed until I came up the steep driveway. Now it's free,

with no
i=
ndication what might have been wrong. The inner sliding tube and

bushings
w=
ere lubed and moved freely. The brakes and cables were fine; the

wheels
tur=
ned freely after I disconnected the cables even though the tongue

was
still=
jammed in the collapsed position.

One odd thing: the lever that comes out of the lower part of the

tongue
tha=
t pulls the brake rod couldn't be tapped loose. No surprise since

the
inner=
tube was fully collapsed and thus actuating this lever. But on the

way
hom=
e, I stopped again: tongue was still collapsed but this time when I

tapped
=
the lever, it came loose and moved freely. I'm just getting into it

now to
=
see what might be amiss but has anyone had this problem?

Chip Bearden


JB,

A long time ago, I had a similar problem with the tongue staying
collapsed. It turned out that there was a gas strut inside the tongue
that had failed. Once the gas strut was replaced, all was OK again..
FWIW...

RO

  #15  
Old August 14th 18, 05:48 AM posted to rec.aviation.soaring
[email protected]
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Posts: 580
Default Cobra trailer brake heating up

On Monday, August 13, 2018 at 8:45:05 PM UTC-4, Michael Opitz wrote:
JB,

A long time ago, I had a similar problem with the tongue staying
collapsed. It turned out that there was a gas strut inside the tongue
that had failed. Once the gas strut was replaced, all was OK again..
FWIW...

RO


Yeah, my understanding is that it's a gas spring and a damper. The damper function seems to work (i.e., I don't have sharp bumps when the mechanism hits the stops under braking or acceleration, as was true in an early Eberle trailer we had with no damper). But I have no way of measuring it against a spec. I've had the damper/spring out before and it's accessible now so I've already emailed Rex about getting a replacement. I was chased inside by the rain yesterday while the tongue was spread out in the driveway so I haven't been able to examine the interior mechanism closely. Will report back what I find.

Chip Bearden
 




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