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Old 05-17-2022, 12:45 PM   #1
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BD retarder and Van Aaken

Good morning iRV2,

Few things I've been researching since taking ownership of our 99 Anthem.

First is on the dash. A toggle switch that says BD Retarder. What does this do and how does it work? From what I can guess based on the limited info online is that is works as an "engine" brake? Not sure how to tell if it's working...

Second curiosity is this CPC Can-Bus Pump Controller by Van Aaken. I've only been able to locate one forum post on a dodge forum that provides some info. Its mounted in the engine bay and has a single harness that ties into the pump.

Anyone got any good info on these two items? Anything I should be concerned with?

Our Anthem has the 5.9L 24 valve Cummins mated to the AT-542 Allison.

Cheers and thank you

Nemi
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Old 05-18-2022, 10:34 AM   #2
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Your B-D exhaust brake/retarder works by closing a butteryfly valve in the exhaust pipe just downstream from the turbocharger. This causes back-pressure in the engine, which slows the vehicle. That switch turn on the electric side of the unit.
When you turn it on, nothing happens unless you are moving over approx. 25 MPH, then the valve closes and you feel the MH slowing.

The BD link explains everything.
I know nothing of the other issue.
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Old 05-18-2022, 04:17 PM   #3
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Thank you Ray,

I was lead to believe that BD Retarder worked through the Trans. With this info I was able to locate this and cleaned up a very obvious sticker.

now for the real mystery. Knowing if it works?

Seems like the short time I've owned this rig I've never really noticed any change with activating the switch.

In my Super Duty with 6.7 Power Stroke you know when the Exhaust brake is on.

Is it possible the butterfly valve is stuck open?

Unless I am mistaken it appears to run off hydraulics to open and close. Anything I should look at?

Thanks in advance,
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Old 05-22-2022, 06:27 PM   #4
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Exhaust brakes I've seen all operate by compressed air cylinder. They do tend to stick when unused for an extended time. BD sells a high-temp oil to lubricate the joints once you get it freed.
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