RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 05-01-2015, 08:38 PM   #1
Junior Member
Join Date: Sep 2014
Location: Fairmont MN
Posts: 2
Exhaust Brake: Don't Leave Home Without It

I have a 2000 Newmar 38 foot Dutch Star diesel pusher motorhome on a Freightliner chassis powered by a Caterpillar 3126 engine with an Allison MD-3000MH six speed transmission. About 3 weeks ago, we left Death Valley National Park westbound on State Hwy 190. As I recall, the warning sign at Towne Pass said 9% GRADE NEXT 6 MILES. I had my exhaust brake switch on and the tranny did its best but as we kept accelerating, it upshifted itself to protect the over-revving engine. It was as terrifying as any ride at Disney World. I was able to stop at the first pull-off to cool the brakes and my mind. I couldnít slow down enough to pull into the 2nd one and any later pull-offs were just blurs. When we finally leveled out, the car following us down overtook us honking and pointing to alert us. As I was pulling off the road, I saw smoke in the mirror and quickly got out. Fortunately, the motorhome wasnít burning. But my Acme EZE Tow dolly was. It has surge disk brakes and oil filled hubs. It got so hot that either brake fluid or hub lube spewed out and ignited. I saw yellow flames and black smoke as I ran back there. Water quickly put out the fire, but the oil in the hubs got so hot that water continued to boil off the hubs as we sprinkled it for several minutes. I think the black gunk splattered onto the wheel my Prius was the caliper dust cover. (Kudos to Acme, that extra braking capacity probably saved our lives!)

It turns out I donít have either an internal engine brake or an exhaust brake on this rig. Freightlinerís Customer Support Center confirmed that my unit was delivered from the factory with a Jacobs exhaust brake. I suspect an earlier owner removed it rather than repair it, there was only pipe from the turbocharger to the muffler. I am hoping to hear from an owner with a similar motorhome, for a photo of his/her exhaust brake placement. I am especially interested in tracing the electrical & air connection originally used. My Freightliner store found the part number for a $895.00 Jacobs brand exhaust brake package for the Cat 3126 that includes everything including wiring and a dashboard switch. That would likely work without re-inventing the wheel. But my web research suggests a Pacbrake PRXB exhaust brake would work better. About the same price. Other ideas?

(This is a long post, suggest you use Quick instead of Quote or delete my text before you hit reply)
I90Tom Betty & Tom from Fairmont MN (Flatlanders)
2000 Dutch Star DP (FL w/ CAT) 113K miles, very few up in the mountains!!
EZ-Tow Dolly and 2006 Toyota Prius 306K miles on original engine/motors & batteries

I90Tom is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-01-2015, 08:57 PM   #2
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 16,990
A belated Welcome to iRV2 .
I have the same chassis/engine combination, a year older , with a Jacobs exhaust brake , in good working condition. If you go Jacobs and need any kind of help PM me for pictures or any info I can provide.

I'm happy with the braking power supplied by this unit , and installed many Pac Brakes on Dodge Cummins , before I retired , so any info required there , maybe I can help.

EDIT: Guess I should have added , I don't have any pictures of the exhaust brake at the moment , but the coach is in the yard and I can take some in the morning.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 05-01-2015, 09:10 PM   #3
Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
I took my first Alaskan trip with the OEM PacBrake. When I got back I ordered the PacBrake PRXB and have made another trip to Alaska since then and absolutely love the additional horsebraking that the PRXB provides.

However, don't expect too much from the PRXB at 55 mph and above. it performs the best at 50 and below.

Dr4Film ----- Richard
Dr4Film is offline   Reply With Quote
Old 05-02-2015, 03:38 AM   #4
Senior Member
osok's Avatar
Join Date: Aug 2013
Location: Huffman, TX
Posts: 780

Is this a great site or what. You post a request for help and in 19 minutes Skip426 answers. Not only did he answer but also says to PM him for more questions and will also go out and take pictures. It just amazes me the support we can receive on iRV2.

I want to also add a belated welcome to the forum. Sorry I can not help on exhaust brake.
2016 Dutch Star 4369
osok is offline   Reply With Quote
Old 05-02-2015, 06:57 AM   #5
Community Moderator
"007"'s Avatar

Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 28,427
Welcome to the forum.
This thread may help also,
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
"007" is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust Brake Switch. Leave it on or off? camato5 Class A Motorhome Discussions 79 05-20-2016 10:32 AM
Exhaust Brake KIX Spartan Motorhome Chassis Forum 33 03-05-2015 05:04 PM
Jake exhaust brake lubing kiethco Freightliner Motorhome Chassis Forum 8 01-04-2015 08:09 AM
Exhaust Brake, Compression Brake, vs Turbo Brake dengraham Cummins Engines 15 09-28-2014 03:17 PM
Exhaust brake gatorv Alpine Coach Owner's Forum 48 05-01-2014 09:59 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:56 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.