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M380 (Unique Issues) If you have a unique issue with your M380 model coach and it can't be answered in one of the other forums here, then this is where you can list it.....list your M380 Parts here too.

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  #51  
Old 05-13-2016
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Dc2x4drvr Dc2x4drvr is offline
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Good deduction Don, I assumed RX was only on pumps remaned 2005 and onwards.
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Lance & Linda Hall
2004 M380
Body #W000234
"Smooth Ride"
Full Timing with 2 cats
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  #52  
Old 05-13-2016
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FYI, D&W Engine Components rebuilds the CAPS pumps in the USA, they come with a one year warranty, and are tested before shipping. The price is $3107.31 + 1200 core deposit.
https://www.dwenginecomponents.com/P...temClassNo=140
The pump has the 2 o-ring modulator.
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Lance & Linda Hall
2004 M380
Body #W000234
"Smooth Ride"
Full Timing with 2 cats
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  #53  
Old 05-13-2016
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Quote:
Originally Posted by Dc2x4drvr View Post
FYI, D&W Engine Components rebuilds the CAPS pumps in the USA, they come with a one year warranty, and are tested before shipping. The price is $3107.31 + 1200 core deposit.
https://www.dwenginecomponents.com/P...temClassNo=140
The pump has the 2 o-ring modulator.
Does anyone know if there is a difference between the ISC and ISL versions of the pump? Mine is clearly labeled ISL, and the one referenced above is identified as being for the 8.3 (ISC) engine.
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Don Bradner
Current: No RV at this time
2015 Jeep Grand Cherokee
Prior: 2004 M380 Double Slide
Prior: 1990 WB40 "Blue Thunder"
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  #54  
Old 05-13-2016
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From the email I received from D&W
Good morning Lance, the Cummins P/N 4076443 actually crosses to our P/N 142-075-0003 which we do carry in stock. Your price would be $3107.31 plus a $1200.00 refundable core deposit. We update ALL our CAPS pumps to the 2 o-ring barrel design.
The TSB references ISCe engines.
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Lance & Linda Hall
2004 M380
Body #W000234
"Smooth Ride"
Full Timing with 2 cats

Last edited by Dc2x4drvr; 05-13-2016 at 05:47 PM.
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  #55  
Old 09-06-2016
BBERIC35 BBERIC35 is offline
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Excellent description and drawings in the Cummins workshop manual on pages F-1,2&3. Easy to see how fuel can get into the lube oil if the cam driven pump plungers start leaking.
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1984 FC35 SB Wanderlodge II (sold)
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  #56  
Old 04-21-2019
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Just adding to this thread,
Last oil analysis showed 5% diesel in oil, I told Cummins about this during yearly maintenance, they said watch it, could be normal. During normal driving the oil level on the stick increased maybe 2 qts over 800 miles, didn’t see any oil on my toad.
I called Cummins tech, he said their are 3 ways the ISL 400 can dump fuel into the oil, 1. Accumulator o-rings,2. fuel pump o-rings, 3. o-rings on injector nozzles.
So, I’ve had the fuel pump o-rings, and injector nozzle o-rings replaced previously, so I had the accumulator module replaced.
All good!
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Lance & Linda Hall
2004 M380
Body #W000234
"Smooth Ride"
Full Timing with 2 cats
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  #57  
Old 10-15-2019
DW SD DW SD is offline
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Anyone here considered adding a FASS fuel pump to aid the injection pump?
www.fassride.com
Lots of ISL / ISC RV owners have done so. At least there are a lot of threads out there about this. Some argue this ensures lubricity of the injection pump and prevents fuel starving.

I have a leaking lift pump, so I'm going to spend some money anyways. Was considering replacing that with a FASS pump that runs all the time, instead of as a starting lift pump. I wasn't planning their fancy air-removal system. Just a pump that runs when the ignition is on between the primary and secondary pumps.

I will take a close look at how plumbing. Haven't done that, yet.

cheers,

Doug
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