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rear brake question

 
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Old 07 Sep 2018, 08:51 am
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Default rear brake question

Anybody know the purpose of the slot (plugged with a rubber plug) in the brake backing plate located just above and forward of where the park brake cable enters the backing plate ?
Does not seem to serve any obvious purpose or provide access to anything.
(This is not in reference to the upper slot provided for star wheel adjustment).
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Old 07 Sep 2018, 02:42 pm
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Cool Re: rear brake question

probably so the backing plate can be used on either side of the car. easier and cheaper to stamp out and extra hole or two then the make two different parts.
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Old 07 Sep 2018, 04:45 pm
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Default Re: rear brake question

Quote:
Originally Posted by Carl48 View Post
Anybody know the purpose of the slot (plugged with a rubber plug) in the brake backing plate located just above and forward of where the park brake cable enters the backing plate ?
Does not seem to serve any obvious purpose or provide access to anything.
(This is not in reference to the upper slot provided for star wheel adjustment).
Like he said above...… the upper plug is for adjusting the brake shoes.
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Old 07 Sep 2018, 05:13 pm
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Default Re: rear brake question

if it is next to a pad then its a inspection hole
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Old 07 Sep 2018, 09:23 pm
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Cool Re: rear brake question

And....adjusting the parking brake!
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Old 07 Sep 2018, 09:34 pm
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Default Re: rear brake question

Its for access to the star wheel to adjust the brakes (#2).

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Old 08 Sep 2018, 11:48 am
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Default Re: rear brake question

Quote:
Originally Posted by rambojoe View Post
if it is next to a pad then its a inspection hole
OK, this may be the best answer.
The slot in question appears to be located behind the area on the leading shoe ( vehicle forward motion) where there would be the most friction and thus the most wear.

FWIW, upon closer inspection, the PT rear drum brake design appears to me to be of the leading-trailing (single leading shoe) non-servo type. Therefore, with the vehicle moving forward, the point of greatest wear would be on the front (leading) shoe just above the bottom anchor point. This is due to the self-energizing action of the shoe to drum contact and drum rotation. So, this would be the perfect place to provide an inspection hole.

Otherwise, thanks for all the replies. Note, however, in my original post it mentioned that the slot in question is NOT the upper slot used for star wheel access. Sorry if this was confusing.
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Old 08 Sep 2018, 01:31 pm
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Default Re: rear brake question

what ever design it may be, the pt for some reason remains the best car for e-brake turns and drifting especially after it rains! (do I need to mention to newbies to keep your thumb on the release?)
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