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10-11-2014, 12:47 PM
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#1
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Junior Member
Join Date: Sep 2014
Location: Corpus Christi TX
Posts: 8
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Exhaust brake
Exhaust brake
I have a 2005 Alpine coach 38ft with a 8.9 Cummins. What exhaust brake will this unit have? When I apply exhaust brake I feel it slow when coming to a stop. I then switch off and on accel eng has no power and blows black smoke on heavy accel. I made a stop for fuel for about 10 min and when I restarted started to drive, on accel if was working great until I use exhaust brake again. Same on accel no power black smoke. Any ideas on this
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10-11-2014, 01:01 PM
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#2
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Senior Member
Solo Rvers Club
Join Date: Jul 2014
Location: Ham Lake, MN
Posts: 3,038
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Glad you're aboard. My guess is it's an exhaust brake that is in the exhaust right after the turbocharger. IMO Sounds like it needs lubrication with special lube for that type of brake. Best of luck on freeing it up. If you can't then a replacement may be needed. Enjoy your adventures and be safe.
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Have a wonderful day!
Ken (RVM 87)
FT DP Wanna B The journey is the destination!
Retired & perfecting procrastination!
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10-11-2014, 01:01 PM
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#3
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Senior Member
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
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When was the last time you lubricated the exhaust brake with Pac Brake Exhaust Brake Lube?
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
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10-15-2014, 08:28 PM
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#4
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Senior Member
Spartan Chassis
Join Date: Dec 2009
Location: Reno, NV
Posts: 300
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I have a 8.3 which is a exhaust brake. If you have a 8.9? You can have a compression or exhaust brake.
I believe a compression brake will have a Hi and low off and on switch for the brake.
If it’s only a off or on then it should be a exhaust brake.
If you lift up the very heavy motor cover ( bed) you will see the air solenoid on the exaust pipe.
This will be the exhaust brake. It’s on top and very easy to see.
Try lubing it with very high temp grease or whatever the owner’s manual says.
If it’s a compression break? I would seek professional advice.
Good luck.
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10-15-2014, 08:56 PM
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#5
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Senior Member
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
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Pacbrake sells a lube specifically for the very high temperature of exhaust brake parts.
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
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10-16-2014, 10:19 AM
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#6
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Junior Member
Join Date: Sep 2014
Location: Corpus Christi TX
Posts: 8
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I have a VGT turbo and it is at Freightliner right now getting diag. will keep you updated.
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10-16-2014, 04:52 PM
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#7
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Senior Member
Join Date: Nov 2005
Posts: 7,383
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Interesting input on PAC-Brakes but none of it applies--2005 with the ISL 400 came with true "Jake" Brake. Its a Cummins engine --so not sure why you are at Freightliner--keep us post on what they tell you about Cummins.....
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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10-16-2014, 06:01 PM
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#8
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Senior Member
Alpine Owners Club
Join Date: Mar 2009
Location: Surprise, AZ
Posts: 836
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Cummins vs. Freightliner
OS ... My personal preference for Cummins engine & Allison transmission repair would be Cummins and the store in Denver was excellent. I'm now in Arizona where the local Cummins shop has been identified in multiple posts as causing issues for Alpine owners. Therefore, I elected to take my coach to Freightliner and am very pleased thus far. I believe the costs for basic services has been slightly less than what I experienced in Denver.
__________________
Bob Bowers (Surprise, AZ)
2003 Alpine Coach 40' FDTS
2014 Jeep Cherokee Lattitude
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10-16-2014, 06:11 PM
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#9
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Senior Member
Join Date: Nov 2005
Posts: 7,383
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Agree-- the Cummins folks in Phoenix [Goodyear????] are not trustworthy....however, without prior knowledge of a maintenance facility, I would still be incline to take my Cummins engine problem to a Cummins shop.....
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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10-20-2014, 07:41 AM
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#10
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Junior Member
Join Date: Sep 2014
Location: Corpus Christi TX
Posts: 8
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Exhaust Brake
Well got my RV back from Freightliner last week and what they check and found was a bad intake manifold pressure sensor. They replaced sensor and all is good. Jake brake is working no black smoke and have full power again. The reason why I took it to Freightliner of Corpus Christi was that the Cummins dealer does not work on RV's. I was very happy with Freightliner they got me in, diag concern, and order part that was needed. Was in and out in 2 days.
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