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Old 06-12-2012, 10:23 PM   #15
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parking brake adjustment.pdf

Not sure if my attachment will work, but it is the section out of the Chevrolet Motorhome Chassis Service Guide on parking brake adjustment.
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Old 06-13-2012, 08:24 AM   #16
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Quote:
Originally Posted by Waipio Rim View Post
Attachment 160889

Not sure if my attachment will work, but it is the section out of the Chevrolet Motorhome Chassis Service Guide on parking brake adjustment.
Yup, that's it for the non electrohydraulic older and commercial stuff. The hand and foot applies are spelled out in that document. BOY, is that a blast from the past for me!
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Old 06-13-2012, 08:37 AM   #17
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I believe mine is mechanical too. If so, adjustment is accomplished by turning the top of the brake handle to either more or less pressure to apply. Basically very simple. Had to reduce the pressure on mine.
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Old 06-13-2012, 08:52 AM   #18
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I don't have manuals prior to '97, but IIRC (and it has been a LONG time) it was sometime in the early to mid 90s when the electro-hydraulic system came to play. As I recall, the issue was retail motorhome owners were not in the habit of applying the park brake at EVERY stop, prior to placing in park. With the heavy GVWs of motorhomes, if one were to park on a hill, they may not get the unit out of park due to the high loads on the parking pawl in the trans.

So, the auto apply system was born. It was, I believe only on motorhome chassis...until Frito Lay came along. I cannot remember if the park pawl was still in the motorhomes after the auto-apply or if motorhomes ever got the Allison trans, but Frito wanted an Allison (which have no parking pawl) for a 21 year, (3 rebuild lives) duty cycle. That put the auto apply in their commercial chassis. That's where I came into the game. Motorhomes were serviced out of the fleet department, because they were so unique as opposed to retail smaller trucks, though they were handled by a coworker of mine. I just had tribal knowledge passed on by him.

Trivia, for what it's worth.

Lesson here, for you mechanical p-brake owners....always apply the p-brake prior to placing in park. It's a good habit anyway, but it may save you some trouble on a hill sometime, especially if you have a toad behind.
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Old 06-27-2012, 10:44 AM   #19
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That brake drum on the drive shaft is the parking brake. It is manual in the 1984 models. The lever on the driver's left side low down pulls the cable through a complicated mechanism, but it is adjustable. Check the brake shoes inside the drum first, and if they're OK then let me know and I'll email you a copy of the adjusting procedure. KJ4JK@ARRL.NET
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