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12-25-2016, 09:18 PM
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#1
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Senior Member
Monaco Owners Club
Join Date: Apr 2011
Location: California
Posts: 788
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Exhaust brake issue
I have a question
02 Holiday Rambler Endeavor exhaust break stays energized when throttle is applied.
Throttle positioning sensor, relay, solenoid and actuator checks OK
Any ideas?
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2006 Monaco Diplomat Atrium model, 41'
Cummins ISL-400HP CM850
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12-26-2016, 04:11 AM
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#2
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
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Quote:
Originally Posted by bukzin
I have a question
02 Holiday Rambler Endeavor exhaust break stays energized when throttle is applied.
Throttle positioning sensor, relay, solenoid and actuator checks OK
Any ideas?
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Sounds as either the Transmission Control Module or the Engine Control Module is sending a "Hot" signal to operate the brake........
You are going to have to find schematics for both, locate the signal wire, and find out which one is doing this. Might just be easier to take it and have it plugged into the Cummins Insite program to troubleshoot it. Most all Cummins shops have the program for the Allison Transmissions to troubleshoot it also.
One thing you might try is to disconnect the negative chassis battery cable, wait and with a test light to see if the solenoid looses the hot signal. Then hook it back up and see if the signal comes back.
Edit: Maybe this will help?
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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12-26-2016, 09:09 AM
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#3
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Senior Member
Monaco Owners Club
Join Date: Jan 2008
Location: Olympia, Wa
Posts: 2,772
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I would look at the lockup relay first. Might just need repeating. Cheap replacement. Also relive actuating arm.
LEN
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2004 Clss C 31' Winnebgo
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12-26-2016, 09:46 AM
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#4
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,704
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It might even be that the linkage that operates the exhaust brake is just sticking, i.e. fails to release easily. Lack of lubrication of the actuating lever is a common problem in older rigs and can cause failure to engage or disengage.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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12-26-2016, 05:58 PM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,441
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Delete
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12-27-2016, 09:11 AM
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#6
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Senior Member
Monaco Owners Club
Join Date: Jan 2008
Location: Olympia, Wa
Posts: 2,772
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I hate auto correct, reseat and relube.
LEN
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2004 Clss C 31' Winnebgo
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12-28-2016, 07:04 PM
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#7
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Senior Member
Join Date: Jun 2015
Posts: 619
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The exhaust brake I have is a PacBrake and it is supposed to be lubricated once per year with a special libe. I would try to lubricate it it first before doing anything more expensive. When you lubricate it, move the part on the spring to make sure it is moving correctly.
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01-03-2017, 07:06 PM
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#8
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Jun 2013
Location: Apple Valley CA
Posts: 1,069
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I was having the same problem. I took the air line off and put a few drops of air tool oil in the slave cylinder and lubed the linkage with a hi temp graphite lube and it never stuck again.
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[SIGPIC][/SIGPIC]
Craig & Carolyn Roberts Apple Valley, CA
Toad: 2017 GMC Canyon 4X4 Crewcab
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