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Old 02-17-2019, 06:31 PM   #1
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Xtarder

New to me how do I now that when a use the switch that it works donít fell a hold back like Jake brake
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Old 02-18-2019, 12:50 PM   #2
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Isn't the Xtarder an engine exhaust brake made by Jacobs?
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Old 02-18-2019, 12:53 PM   #3
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https://parts.jacobsvehiclesystems.c...fs/021071B.pdf
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Old 02-18-2019, 04:33 PM   #4
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An exhaust brake is located on ....the exhaust above the engine (at least on my cummins) and I would expect that it is either electrically or air fired - there should be a cylinder visible near the exhaust piping. Mine is before the turbo.
Anyway, if your engine is in the rear and you have access from inside the coach, open the access and have a friend (or wife) ride back there with a flashlight and watch what happens to the exhaust brake. I don't know what tranny you have so this next info could be wrong - I have an Allison tranny and I have a PacBrake Exhaust Brake with an activation switch on the dash. On mine, once I get above 10mph the exhaust brake is enabled and stays off as long as I have my foot on the fuel pedal. Once I release my foot the throttle linkage goes back to "none" and starts the process in motion - the tranny starts to downshift and the exhaust brake turns on. The exhaust brake is turned off automatically at 10mph or less.
Let us know what engine and tranny you have.
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Old 02-19-2019, 01:56 AM   #5
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Allison trans as I read it’s inside the transmission
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Old 02-19-2019, 01:58 AM   #6
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No it’s not a exhaust system
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Old 02-19-2019, 02:01 AM   #7
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Extarder is in the transmission just feel any hold back so don’t know if is working or maybe I don’t know how to work it only has a switch beside the shifter panel
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Old 02-19-2019, 04:15 AM   #8
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Maybe you're using the wrong name for the brake? "Extarder", as dbarton291 linked, is an Exhaust retarder (exhaust brake).
Let us know if you need more help.
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Old 02-19-2019, 06:31 AM   #9
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The output retarder is inside the transmission. That's an Allison Transmission option.
The Xtarder is an exhaust brake made by Jacobs.
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Old 02-20-2019, 03:07 PM   #10
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Sorry guys it’s a retarder 1998 national tradewind 300 cat / Allison trans
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Old 02-20-2019, 03:08 PM   #11
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It is a retarder
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Old 02-20-2019, 03:44 PM   #12
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If it's a Jake product I am unfamiliar with it. If it is a Pacbrake, the instructions above are valid.
Please let me know if it is Jake or Pacbrake.
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Old 02-20-2019, 03:50 PM   #13
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Quote:
Originally Posted by Rockyv View Post
Sorry guys it’s a retarder 1998 national tradewind 300 cat / Allison trans
Look at the nameplate on the side of the transmission, you probably have the Allison 3060 series, if it ends in an R, it probably has a retarder.
Does not appear to be stock on your coach, although the jake brake, [extarder] was.
http://countrymotorhomes.com/trade/brochure.pdf
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Old 02-21-2019, 06:27 AM   #14
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Quote:
Originally Posted by jcussen View Post
Look at the nameplate on the side of the transmission, you probably have the Allison 3060 series, if it ends in an R, it probably has a retarder.
Does not appear to be stock on your coach, although the jake brake, [extarder] was.
http://countrymotorhomes.com/trade/brochure.pdf
That's a good tidbit of info to help people (I know my tranny does not have a retarder inside).

I took a pic of the nameplate on my tranny when I was replacing a sensor - where would you see the -R? My model says MD 3060.
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