I have a 2000 Monaco Windsor with Cummins ISC 8.3 engine. My current pacbrake model is C16020 and serial number is 039573. It looks like it is 4 in diameter on the outside, and full marmon to the exhaust and half marmon to the turbo side. I would like to upgrade to a PRXB, please advise the PRXB part number and clamp part number, thanks! ( Yilun Yu, 09/17/2022 )
Your coach will take the PRXB Upgrade part # C40109, C11350 exhaust clamp and C11355 turbo clamp.
I currently have a Pacbrake installed. I would like to upgrade to a newer unit. I am not currently at the motorhome, it is a 1999 Monaco Windsor 38' with one slide. I believe the serial number for the Pacbrake is 7044, and the date was 01/31/2005 on the information package.

I don't know the serial number for the Cummins engine. I do have the ISC Ops and Maint. manual and was told by the previous owner that it was a 330 hp engine. It does also have the Banks Ottomind installed, which must be used with the banks power pack.

Would the C40109 be the correct replacement for the Pacbrake that is currently installed?
What is included with this unit? Is it the complete install kit?

Thank you,

Jef Johnson ( Jef Johnson, 08/02/2022 )
Hi Jef, Here is the response I received from PacBrake "That serial number comes up as a C20348. It would be used on a Cummins ISL engine in a Monaco. The PRXB upgrade is part# C40103" So please make sure that you have an ISL and not an ISC. An ISL is an 8.9L and the ISC is an 8.3L.
I have a 2004 Holiday Rambler motohome with a Cummins 8.3 engine which has a Pacbrake exhaust brake. The Pacbrake has not been able to slow the coach down like it use to so I took to struck repair shop and so far they road tested it and the electrical aspect of the PACbrake seems ok . The next step they are going to do is go into the mechanical workings of the brake. If it should need replacement what brake would I need to order? The current Pacbrake serial number is 004282. Your advice would be greatly appreciated.

Thanks
Ron Scherer ( Ron Scherer, 07/24/2022 )

This should take either the C40108 if full marmon turbo face or C40109 if half marmon turbo face.


Will the C40109 Pacbrake fit my 1994 Holiday Rambler Imperial motor home? it has an 8.3 L Cummins engine. ( Wayne Ramer, 07/02/2021 )
The C40109 would not be correct as that is for the later model 8.3L ISC and yours is the mechanical fuel C8.3. If the brake is mounted to the backside of the turbo housing, you would likely need C40100 but it is best to get the serial # off the old brake for us to verify. This would be stamped into a metal tag riveted to the cylinder actuator arm.
Will the C40109 fit my 2006 Holliday Rambler Ambassador powered by a 8.3 Cummins diesel? Does it include the clamps and or gaskets necessary to complete the replacement. If I have to order them separate can you tell me which ones to order with cost. ( Larry Mahugh, 04/05/2021 )
Your RV will take the part # C40108 brake unit, turbo clamp part # C11355, and exhaust clamp part # C11350.