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Old January 8th 18, 10:04 PM posted to alt.home.repair,rec.autos.tech
Clare Snyder
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Posts: 72
Default Drum brakes - do you disconnect the parking brake cable?

On Mon, 8 Jan 2018 16:19:51 -0500, Tekkie® > wrote:

>Clare Snyder posted for all of us...
>
>
>>
>> On Mon, 8 Jan 2018 07:03:33 -0500, Meanie > wrote:
>>
>> >
>> >> Also, only one shoe is worn, and it's the front shoe, and it's been on
>> >> there for 175K miles, but I wonder if the shoes can be switched, so that
>> >> the front shoe is in the rear and the rear shoe is in the front, since they
>> >> wore so unevenly (sort of like rotating tires).
>> >>
>> >Much depends on the vehicle. Many shoes are identical and it doesn't
>> >matter if they are placed in front or rear.

>> Define "many"
>>
>> Only vehicles with "twin leading shoe" brakes use the same shoe front
>> and back - and I'm not aware of ANY vehicle built with twin leading
>> shoe brakes since the early seventies - and then only British
>> vehicles. The leading and trailing shoe are generally of different
>> lengths as well as often different friction materials.
>>
>> > Others are specific and
>> >require proper position and seating. In your case, the shoes appear to
>> >be the same but that wear is something I wouldn't simply "rotate" with
>> >the other side. One side wearing more than the other is not normal and
>> >should be checked, repaired/replaced then install new shoes with the
>> >proper even thickness.

>>
>> Actually it IS common - and considered normal, for the "leading shoe"
>> to wear differently than the "trailing shoe" on a servo type (self
>> energizing) brake system - which virtually all recent (modern) drum
>> brake systems are. the leading shoe contacts the drum, and the drag
>> (friction) on that shoe rotates the shoe through the linkage between
>> shoes, forcing the trailing shoe more firmly in contact with the drum.
>> This enhances the brake action beyond what would be possible strictly
>> by the hydraulic force from the wheel cyls.
>> >
>> >> But mainly I'm not sure what the procedure is for the parking brake cable.
>> >> Can you advise?
>> >>

>> It generally unhooks from the activbation lever connected to the
>> brake shoes. On soime cars the lever unhooks easily from the shoe and
>> does not NEED to be disconnected from the cable
>>
>> Again - I would ADVISE you (the OP) to have a mechanic properly
>> repair the brakes.

>
>Clare, prepare for the onslaught...



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