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Old 08-18-2017, 01:59 PM   #1
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HR park brake

I have a 2002 Holiday Rambler ambassador. Can someone tell me if the emergency brake Works off of the calipers or is there a separate mechanism for that?
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Old 08-18-2017, 02:09 PM   #2
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I have a 2002 Holiday Rambler ambassador. Can someone tell me if the emergency brake Works off of the calipers or is there a separate mechanism for that?


There is no separate mechanism. When the air brake plunger is pulled up, air is released from the dual chamber brake chambers at the rear axle. This releases big springs that act on the brake shoes & force them against the drums.
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Old 08-18-2017, 02:16 PM   #3
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Thank you. On a trip. Stopped and applied park brake. Rear caliper is now dragging
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Old 08-18-2017, 02:31 PM   #4
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Thank you. On a trip. Stopped and applied park brake. Rear caliper is now dragging


You should activate the parking brake & release a few times & see if anything changes. You should also make a few forceful applications of the brake peddle. If the brake is really not releasing then you shouldn't try to drive. It can generate enough heat for the tire to catch fire.

Do you hear it dragging or can you feel it?
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Old 08-18-2017, 02:34 PM   #5
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More than a little confused here .

Steve's answer is correct for a diesel pusher equipped with air ( drum ) brakes .
BUT:
Pinecrestfar, is your coach on a diesel pusher chassis equipped with air brakes ?
You say caliper dragging, that leads me to believe your coach may be equipped with four wheel disc brakes and maybe hydraulic.
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Old 08-18-2017, 02:52 PM   #6
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More than a little confused here .



Steve's answer is correct for a diesel pusher equipped with air ( drum ) brakes .

BUT:

Pinecrestfar, is your coach on a diesel pusher chassis equipped with air brakes ?

You say caliper dragging, that leads me to believe your coach may be equipped with four wheel disc brakes and maybe hydraulic.


Yes, he has a D/P with air brakes. I think he is just getting his terminology mixed.

It did make me think of another possible cause of brake dragging. Ponecrestfar, have your rear trailing arms been inspected? The '02 Ambassador was one of the coaches with a flawed design for the trailing arms. They are prone to breaking. There is a upgrade kit available but if yours have not been upgraded then a broken trailing arm could cause your rear axle to shift out of alignment and that could cause the brake to drag.

At any rate, if you haven't figured it out yet, it would be prudent to not drive until the cause is discovered.
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Old 08-18-2017, 03:22 PM   #7
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Yes, he has a D/P with air brakes. I think he is just getting his terminology mixed.

It did make me think of another possible cause of brake dragging. Ponecrestfar, have your rear trailing arms been inspected? The '02 Ambassador was one of the coaches with a flawed design for the trailing arms. They are prone to breaking. There is a upgrade kit available but if yours have not been upgraded then a broken trailing arm could cause your rear axle to shift out of alignment and that could cause the brake to drag.

At any rate, if you haven't figured it out yet, it would be prudent to not drive until the cause is discovered.


Just figured out that I may be totally wrong about your brakes. Your '02 Ambassador brochure isn't on the HR web site but in researching further, it appears that you might have air over hydraulic brakes. Since I have no experience or expertise in these brakes, please disregard my posts as the rantings of a lunatic.
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Old 08-18-2017, 09:30 PM   #8
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Thanks for the info. It is air over hydrolic. Have just replaced both front caliper. Appears I will need to do the rear also. At camp now. Will attempt to free it up using the method you mentioned. Thanks again
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