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After a several year hiatus, Detroit Diesel has announced that they are returning to the business of powering motorhomes. They have the DD-13 reworked to meet the 2010 emission standards and will be providing that unit rated at 500 HP for motorhome use. Since Newell has moved on to larger, higher horsepower engines, I doubt that you will see a return to DD for Newell unless a customer specifically requests the DD-13.

http://www.rvbusiness.com/2013/04/detroi...home-game/

What is the operating temperature range for the Allison 6 speed?
I'm using VMSPC and wondering what is normal.

How ofter does one change the hot and cold water hoses on the washer? Chappell

It's time to put new shoes on the coach before sailing for Spearfish. I don't have the option of upgrading to the 315 wide tire so I am going with the one option I know of to get a bigger load margin on the front. That is the Michelin XZU3. 305/75 24.5 LRJ tire. My local tire guy says these are difficult to obtain and will have to ship then from "out west". Two questions for you. Are there 24.5 alternatives that you know of with load range J? And if you have used this tire did you have similar sourcing issues?

Do any of you know whether there are national parks that would accommodate a 45 foot rig?

Hello,
I noticed after we upgraded our tail lights on our coach ( LED lights ) since we did rewired these , now out Tow car with magnetic type lights has only running lights ( no blinkers or stop lights )
I have 4 pin type connector.
my question is, can I just cut the wires open from Coach light cable , it has 4 pin type male plug & one by one connect to the female plug on the tow car's light and trace to get it right?

I am not electric skilled and don't want to burn anything in the coach , but I was thinking that perhaps is how I can match the right wires.
Or , do I have to re wired my car with totally different system.

The way we have had wire the tail light is that all 3 red lights will be on when running and stopping, before I believe it was only two.
Thanks you for any tips you might have.
We want to keep out tow car for long time and perhaps you might have some tips how to wire your car's lights for towing and eliminate the magnetic lights.
We are fultime on the road and i need to fix this problem.

Here's to a happy retirement as you start the next phase of your life.
Gonna be fun!

The aquahot heater in the bathroom was working intermittently. The fan would always blow but sometimes it would blow cold, sometimes hot. I tried tapping on the check valve repeatedly and frequently and it never did work right.
Today I picked up a new relay for a spare. I grounded the terminal for the bathroom heater and the relay clicked open but the pump would not run. I swapped relays and it worked every time. So I used the spare relay and now it is working every time.
Question: are these relays repairable?

Gang,

When I bought my 03 with a C-12 Cat engine two years ago from Newell, it slung its serpentine belt off while I was on my out of Miami. Back to Newell. They advised to go to Fabick Caterpillar in Joplin. That is the start of a very long story that involves many trips to Miami and a couple to Joplin.

The good news is that the problem has now been found and fixed!

My symptoms were: 1) Belt wanted to "ride up" on some of the pulleys. 2) Belt would sometimes just break. 3) My AC compressor would kick on and off and when On the belt would really flop around. (like the compressor was pulling too hard). 4) The belt (or pulleys) squeaked when the engine was running.

Newell / Fabick replaced (over time) replaced all of the pulleys and the tensioner. Problem would seem better and then would return.

Yesterday at Thompson Caterpillar in Birmingham, I believe the problem was solved once and for all.

It turns out that there were many problems all combining to create this issue. Here are the problems in (my ranking) in descending order of severity.

1) The wrong tensioner was installed when the engine was installed in the Newell (10 years ago). The old tensioner which was a custom application (would hit its limit before taking all the tension out of belt. The new one (correct one for C12) has much more turn radius to take more tension out.
2) There was a subtle nick in the Alternator pulley that was grinding one of the grooves from the belt. (nick was filed off).
3) All of the problems with belts had filled the "teeth" of pulleys with old rubber making for less friction and more slipping.
4) The replaced pulleys were not installed with bearing "centerers". The front bearings on the two large pulleys were free to wobble around the bolt that holds them on.
5) One of the large pulleys had a completely bad bearing.

The long and short of this episode is that its actually pretty simple to diagnose belt problems. (at least for a Cat with serpentine belt).

1) take belt off and hand turn the pulleys by hand. They should turn easily and you should not feel any "grinding". If you spin them they should gradually slow down and not stop suddenly. If not suspect a bearing problem.

2). Closely inspect the teeth on the pulleys. (any nick or rough spot will gradually sand down your belt).

3). Check the operation of your tensioner by ensuring that it is not hitting the stop on the tight side.

4) Check the operation of the belt with the engine AC compressor on and off. In my case, the belt was fine if the compressor was off. If the belt flops around a lot during operation, you have a problem to find. Do not accept advice from anyone that says this is "Normal" for this engine. I still can't believe that I bought that one.

5) Using a long metal ruler ensure that all the pulleys are parallel and in the same plane.

Going forward...I have learned a few lessons:

1. Draw a belt routing map and keep it near the engine. My engine has lots of pulleys and such and a map will help you put a belt back on if it breaks.

2. Keep a spare belt with you at all times.

3. Inspect your belt and pulleys carefully. I was once running with a 7 groove belt instead of the normal 8 groove belt. (The other one had been ground off).

4. I dont believe that belt replacement is on the Newell maintenance checklist...but it IS on mine. My belt will now be replaced once / year.

Hope this helps someone.

Cheers,
bill
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What spare parts that are only available at Newell should I get while at the factory?
Thanks.