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Old 03-05-2014, 06:00 PM   #1
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Smile Need Brake cable for Parking brake 08 Alpine

Hi,
Has anyone had to replace the cable on the parking brake? If so, can you tell me what brand it might be and a source for one perhaps?

My mobile truck service has determined the cable has stretched to the point we have no adjustment left on it. We have taken the jam nut off to get more adjustment space, but need to find a new cable for a long term fix. (I am not sure what use the jam nut does in this case as it can not turn). We have searched for a brand, model or any identifying numbers to no avail. The actuator seems to be working fine with no leaks, but they say they did not supply the cable and it must of been a WRV part purchased somewhere else. They also said do not try to make one as they can fail easily if made wrong?

Does anyone have any ideas? The park brake will hold on level ground, but not on any kind of slope or with the transmission in gear at idle.

I have a 2008 Alpine 40' MDTS with the Low roof.

Thanks in advance for your input,
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Old 03-05-2014, 11:27 PM   #2
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If it had truly stretched, then the original cable wasn't made properly imho. I don't know anybody else that's had to replace that cable.
With that said, I believe you could shim the actuator with a 1/4" plate or so & see if that corrects the problem.
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Old 03-06-2014, 08:04 AM   #3
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Agree with EM, there are a number of threads about the parking brake on the forum. Some newer Alpines have experienced issues with parking brakes due to partial air loss and brake shoe drag/wear. If cable was too long [stretched], shoe would drag and wear thin. If brake nolonger holds, then shoes are too thin or cable/actuator is too short--causing load spring to no longer engage the shoes????? Could it be that you are adjusting the cable in the wrong direction--shorter vs longer?????

Position of actuator has also been mentioned. Think I'd make sure shoes are in good order and actuator is properly positioned before messing with the cable replacement. Having said that--fabricating a new cable isnt "rocket science" either [If a fabricated cable should fail, the worsed that could happen is the brake comes on--the cables holds the the brake off, it doesnt "pull" brake on.]
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Old 03-06-2014, 09:29 AM   #4
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Sounds as if you need to find a mechanic who understands that the cable disengages the brake NOT engages it.
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Old 03-06-2014, 09:45 AM   #5
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YUP--sounds like my carpentry skills--"....cut the board off three times and its still too short!" [smile]
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Old 03-06-2014, 12:38 PM   #6
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If the shim method doesn't work, or if it works for a while but it turns out one cable end is releasing & the cable stretches some more:
Madison Power Systems makes heavy brake cables to order, I found them doing google searches on "heavy duty brake cable" and poking thru the hits. Gotta be a bunch of other outfits that do similar work. They'd need a "shop drawing" showing the details of the cable, thickness, end types & dimensions.
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Old 03-06-2014, 10:10 PM   #7
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Hi,

Thanks for the input. I will meet with my mechanic and follow up on your suggestions. In the past he has been right on with my last three motor homes and has 25 years in the trade, butt anything is possible.
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