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Old 02-01-2008, 02:16 AM   #15
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I'm a bit confused. I was under the impression WRV installed Pac-Brake units on their products. Is there a 2-stage Pac-Brake? Or is it a Jacobs unit on this particular rig?
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Old 02-01-2008, 04:48 AM   #16
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Your 99 coach has a Pac Brake. In 2002 they starting offering the ISL series Engine and they have a Jacob's compression brake. This is designed in the engine. It is not something that can be added.
The Pac brake has only one position. The Jacob's brake can have two positions. The earlier coaches only had a high position.

Clark:
I have installed chains/cables on my Alpine in the past. They are easy to install if you have a few blocks to put under the jacks. You just raise one rear wheel off of the ground at a time and put the chains on that side. Then set that side down and raise the other side the same way.

I prefer cable to chains, as to the fact if one breaks it will not do near the damage to the coach as chains. This is what LesSchwab recommended to me when I purchased mine in Montana last year.
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Old 02-01-2008, 08:02 AM   #17
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Clark,

Your Jacobs compression brake uses motor oil pressure to open the Cummins exhaust valves.

I have found many times the brake will not operate properly until the motor oil is completely warmed up. I suspect this is why you felt the brake not working first thing on a cold motor.

See you in Moab!
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Old 02-01-2008, 08:29 AM   #18
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by two sailors:
Clark,
If the road is icy going down any hill I would advise you to leave the Jake OFF. It will slow the back wheels enough to make them slide if the surface is slippery enough. And with a heavy toad that could mean jackknife!

Brad </div></BLOCKQUOTE>

thanks for the heads up info
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Old 02-01-2008, 10:32 AM   #19
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TrehCub and Gary....

Thanks for the helpful information.

Clark
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Old 02-01-2008, 10:42 AM   #20
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Thanks Trehcub.
I suspected as much but wanted to know.
I'm seriously considering the PRXB upgrade to my Pac Brake. The current unit works pretty well but I'd like a bit more slowing power.
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