Breakdown Information
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RV particulars: Holiday Rambler Endeavor
Driveline (Engine, Transmission): 330 Cummins 04 Pegagus Engine, Allison 3000
Miles: 12,000
Year: 2004
Break Down Description: Lost all power on a downgrade, black smoke pouring out of exhaust. Idle OK. Pulled over to side and limped 2 miles to rest stop. Decided it was the Pacbrake and wired the air cylinder open. After this I learned that I could just turn off the Pacbrake and proceed.
Symptoms: Power loss and black smoke
Effect: Safety issue as the first time it happened in heavy Interstate traffic with almost no shoulder.
Cause: The cause is the Pacbrake, either the physical Pacbrake itself or the electronics that controls the Pacbrake or possibly the air solenoid (Pacbrake said this was unlikely).
Outcome: Intermittent problem that Cummins could not find (just tested the Pacbrake). It failed 3 more times in the next 600 miles. Then I added temporary wiring and a voltmeter to isolate to an electronic failure or the air solenoid/Pacbrake and it has not failed in the last 500 miles since adding the voltmeter. Incidentally this is not a Cummins part or warranty item. Monaco installed this part with the full cooperation and agreement of Cummins and Allison but it is a Monaco warranty item.
I also learned that the Cummins Medford, OR shop is not trained to test the Pacbrake. They failed to do a major but very easy test, namely disconnect the air cylinder and physically move the butterfly valve to check for binding. They also billed Monaco for almost 3 hours for a 15 minute test. OK, I'd give them a hour as I repeated all of their tests in under a hour at home.
Driveline (Engine, Transmission): 330 Cummins 04 Pegagus Engine, Allison 3000
Miles: 12,000
Year: 2004
Break Down Description: Lost all power on a downgrade, black smoke pouring out of exhaust. Idle OK. Pulled over to side and limped 2 miles to rest stop. Decided it was the Pacbrake and wired the air cylinder open. After this I learned that I could just turn off the Pacbrake and proceed.
Symptoms: Power loss and black smoke
Effect: Safety issue as the first time it happened in heavy Interstate traffic with almost no shoulder.
Cause: The cause is the Pacbrake, either the physical Pacbrake itself or the electronics that controls the Pacbrake or possibly the air solenoid (Pacbrake said this was unlikely).
Outcome: Intermittent problem that Cummins could not find (just tested the Pacbrake). It failed 3 more times in the next 600 miles. Then I added temporary wiring and a voltmeter to isolate to an electronic failure or the air solenoid/Pacbrake and it has not failed in the last 500 miles since adding the voltmeter. Incidentally this is not a Cummins part or warranty item. Monaco installed this part with the full cooperation and agreement of Cummins and Allison but it is a Monaco warranty item.
I also learned that the Cummins Medford, OR shop is not trained to test the Pacbrake. They failed to do a major but very easy test, namely disconnect the air cylinder and physically move the butterfly valve to check for binding. They also billed Monaco for almost 3 hours for a 15 minute test. OK, I'd give them a hour as I repeated all of their tests in under a hour at home.
