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Old 14 Dec 2011, 11:14 pm
ballstoyourpartner
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Default Lubricating e-Brake Caliper Cam

2001 Honda Accord 2.3l, sedan, manual transmission, 217,000 km
Right rear e-brake lever is sticking ever since I replaced the pads Have
checked brake cable and its travel is unimpeded.
Strongly suspect e-brake caliper cam is 'sticking' due to lack of
lubrication or dirt/rust, although local brake shop says this happens 80% of
the time when pads are replaced. Yikes!!
Brake shop just wants to replace the whole caliper at $355 CDN (and then
they recommend doing both rear calipers at the same time - $710 CDN!) but I
would really like to fix the source of the problem and thereby save some
money. Is there a relatively easy way to lubricate the cam and, if so, what
would I lubricate it with?
In the alternative, would putting a stronger spring on the lever likely
resolve the 'stickiness' and, if so, how would I specify such a spring (what
spring coefficient?) and where would I be most likely to find one?

balls


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  #2 (permalink)  
Old 15 Dec 2011, 09:25 am
Tegger
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Default Re: Lubricating e-Brake Caliper Cam

"ballstoyourpartner" <balls69bc@yahoo.ca> wrote in
news:leqdnZMAlIm6H3TTnZ2dnUVZ_t2dnZ2d@posted.toast net:

> 2001 Honda Accord 2.3l, sedan, manual transmission, 217,000 km
> Right rear e-brake lever is sticking ever since I replaced the pads
> Have checked brake cable and its travel is unimpeded.
> Strongly suspect e-brake caliper cam is 'sticking' due to lack of
> lubrication or dirt/rust, although local brake shop says this happens
> 80% of the time when pads are replaced. Yikes!!
> Brake shop just wants to replace the whole caliper at $355 CDN (and
> then they recommend doing both rear calipers at the same time - $710
> CDN!) but I would really like to fix the source of the problem and
> thereby save some money. Is there a relatively easy way to lubricate
> the cam and, if so, what would I lubricate it with?
> In the alternative, would putting a stronger spring on the lever
> likely resolve the 'stickiness' and, if so, how would I specify such a
> spring (what spring coefficient?) and where would I be most likely to
> find one?
>



Are you sure it isn't simply the clevis (pivot on the end of the cable)
seized on the cam lever? That sticks ALL the time.

The clevis is held to the cam lever by a pin, and and a tiny clip on the
underside of the clevis. The parts rust together, clamping the clevis to
the cam lever so it can't pivot and allow the cam lever to rotate all the
way. Get a set of Vise-Grips, and see if you can force the cable clevis
into rotating on the cam lever.


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Tegger
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  #3 (permalink)  
Old 19 Dec 2011, 12:54 pm
ballstoyourpartner
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Default Re: Lubricating e-Brake Caliper Cam

Tegger,
Thanks for the quick response.
"Tegger" <invalid@example.com> wrote in message
news:Xns9FBC69FCA9836tegger@208.90.168.18...
> "ballstoyourpartner" <balls69bc@yahoo.ca> wrote in
> news:leqdnZMAlIm6H3TTnZ2dnUVZ_t2dnZ2d@posted.toast net:
>
>> 2001 Honda Accord 2.3l, sedan, manual transmission, 217,000 km
>> Right rear e-brake lever is sticking ever since I replaced the pads
>> Have checked brake cable and its travel is unimpeded.
>> Strongly suspect e-brake caliper cam is 'sticking' due to lack of
>> lubrication or dirt/rust, although local brake shop says this happens
>> 80% of the time when pads are replaced. Yikes!!
>> Brake shop just wants to replace the whole caliper at $355 CDN (and
>> then they recommend doing both rear calipers at the same time - $710
>> CDN!) but I would really like to fix the source of the problem and
>> thereby save some money. Is there a relatively easy way to lubricate
>> the cam and, if so, what would I lubricate it with?
>> In the alternative, would putting a stronger spring on the lever
>> likely resolve the 'stickiness' and, if so, how would I specify such a
>> spring (what spring coefficient?) and where would I be most likely to
>> find one?
>>

>
>
> Are you sure it isn't simply the clevis (pivot on the end of the cable)
> seized on the cam lever? That sticks ALL the time.
>
> The clevis is held to the cam lever by a pin, and and a tiny clip on the
> underside of the clevis.


I do not have a clip on the underside - the clevis, with a
rectangular-shaped hole in it, simply slides over a 'claw-shaped' point on
the end of the cam lever and is held there simply by the tension of the
e-brake cable and the semi-circular path it would have to take to come off.
Also, my clevis cannot rotate on the cam lever because of the rectangular
hole in it and the 'flatness' of the point on the end of the cam lever and
it doesn not need to rotate because the cable pulls almost straight down on
the cam lever.

> The parts rust together, clamping the clevis to
> the cam lever so it can't pivot and allow the cam lever to rotate all the
> way. Get a set of Vise-Grips, and see if you can force the cable clevis
> into rotating on the cam lever.


So, this brings me back to my original question - is there a relatively easy
way to lubricate
the cam and, if so, what would I lubricate it with? In the alternative,
would putting a stronger spring on the lever
likely resolve the 'stickiness' (it doesn't take much hand force to
'release' the cam lever) and, if so, how would I specify such a spring (what
spring coefficient?) and where would I be most likely to find one?

>
>
> --
> Tegger


balls


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  #4 (permalink)  
Old 20 Dec 2011, 01:38 pm
Tegger
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Posts: n/a
Default Re: Lubricating e-Brake Caliper Cam

"ballstoyourpartner" <balls69bc@yahoo.ca> wrote in
news:jco178$nu6$1@dont-email.me:

<snip>


>
> I do not have a clip on the underside - the clevis, with a
> rectangular-shaped hole in it, simply slides over a 'claw-shaped'
> point on the end of the cam lever and is held there simply by the
> tension of the e-brake cable and the semi-circular path it would have
> to take to come off.




My mistake. I was imagining the earlier design. The idea is the same
between the two designs, though.



> Also, my clevis cannot rotate on the cam lever
> because of the rectangular hole in it and the 'flatness' of the point
> on the end of the cam lever and it doesn not need to rotate because
> the cable pulls almost straight down on the cam lever.




The end of the parking brake lever IS supposed to pivot on the parking
brake cam. But that square hole rusts to the cam lever, preventing the
square hole from swiveling on the cam lever. If the end of the cable cannot
swivel on the cam lever, the cable will bind inside its sheath and prevent
the cam lever from rotating.

With the parking brake OFF, can you pivot the end of the PB cable on the
cam lever? If not, then it's rusted and needs to be broken free.


<snip>


>
> So, this brings me back to my original question - is there a
> relatively easy way to lubricate
> the cam and, if so, what would I lubricate it with?




Don't even try. The cam mechanism is deep inside the caliper, at the bottom
of the cam-lever post. There is a rubber seal (similar to an engine oil-
seal) between the cam lever post and the hole in the caliper. If you try to
put grease in there, you will destroy the rubber of the seal while getting
nowhere near the cam mechanism itself.

Honda did have a run of very early-'90s calipers with defective seals on
the parking brake cam post. Water would seep past the seal, allowing rust
to form on the cam post, causing it to seize inside the caliper, preventing
the post from rotating. But yours isn't one of those.


--
Tegger
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  #5 (permalink)  
Old 21 Dec 2011, 08:31 am
Tegger
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Default Re: Lubricating e-Brake Caliper Cam

Tegger <invalid@example.com> wrote in
news:Xns9FC19501260tegger@208.90.168.18:


Corrections:

>
> The end of the parking brake lever



Parking brake CABLE, I meant to say...


> IS supposed to pivot on the parking brake cam.



Parking brake cam LEVER, I meant to say.




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Tegger
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