Forum Discussion

shoalsgary's avatar
shoalsgary
Explorer
Feb 12, 2020

Unsuccessfully trying to upgrade my exhaust brake

I have a 2003 Holiday Rambler Endeavor with Cummins CAPS engine and my exhaust brake is frozen. I've tried soaking in diesel fuel, soaking in PB Blaster, using Bigger Hammer, heat, and NOTHING frees it up. So I want to upgrade to the PPRXRB brake. But every supplier wants the model number of my brake. The only number on my pump is C319 cast into it, but that doesn't satisfy them. Where can I find the model number of my original brake???
Class A

10 Replies

  • shoalsgary's avatar
    shoalsgary
    Explorer
    Feb 13, 2020
    It says PacBrake on it. I contacted Pacbrake and gave them the information requested and have not heard from them yet.
  • keefr's avatar
    keefr
    Explorer
    Feb 13, 2020
    Is it possible that your original was made by Jacobs (the Jake people)? They supplied exhaust brakes for some engines of that vintage. I agree with Brett Wolfe, you should be contacting PacBrake directly - they will be able to tell you what part you need better than any dealer or reseller. I have found them to be incredibly helpful.
  • wolfe10's avatar
    wolfe10
    Explorer
    Feb 13, 2020
    shoalsgary wrote:
    Now I'm trying to find the PXRB that replaces it. I provided my engine number (46248452) and have found nothing on the exhaust brake, original OR PXRB.


    You talked with PacBrake Corp?
  • shoalsgary's avatar
    shoalsgary
    Explorer
    Feb 13, 2020
    Now I'm trying to find the PXRB that replaces it. I provided my engine number (46248452) and have found nothing on the exhaust brake, original OR PXRB.
  • shoalsgary's avatar
    shoalsgary
    Explorer
    Feb 12, 2020
    schlep1967 wrote:
    Is it frozen because of carbon build-up? Or is it a mechanical issue? If it is carbon build-up try soaking it in Purple Power overnight. $8 a gallon at our local Autozone. Works great for cleaning all things EGR related.


    nO CARBON BUILD UP. PROBABLY FROZEN FROM NON-USE.
  • schlep1967's avatar
    schlep1967
    Nomad
    Feb 12, 2020
    Is it frozen because of carbon build-up? Or is it a mechanical issue? If it is carbon build-up try soaking it in Purple Power overnight. $8 a gallon at our local Autozone. Works great for cleaning all things EGR related.
  • ScottG's avatar
    ScottG
    Nomad
    Feb 12, 2020
    I think you'll find the S/N tag mounted sideways on the timing cover, kind of behind the inj. pump.
    You can use this number to contact Cummins and they can tell you every part that's associated with your eng.
  • MrWizard's avatar
    MrWizard
    Moderator
    Feb 12, 2020
    I the Cummins i had
    The engine serial # was on a metal tag
    Irrc it was near the injection pump

About Motorhome Group

38,769 PostsLatest Activity: Apr 04, 2026