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Old 03-06-2019, 06:59 AM   #1
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What is the Roadmaster M4R D-series, and who has the RR10S chassis

I'm looking at the Monaco-Roadmaster VIN decoder, and I see a chassis type called "M4R D-series", does anyone know what that is? What type of chassis and on what coaches was it used?

Also, the VIN decoder (from 2003) does not have the Roadmaster RR10S chassis listed. I don't think there was a RR10R (rear radiator). Did that later VINs use the same number for the RR10S as the RR8S)?

If anyone has a coach with this chassis, what # or Letter was used in the VIN for this chassis (would be the forth position in VIN).
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Old 03-06-2019, 11:29 AM   #2
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Good morning Mike; That is a very interesting question. I do not have the answer and have never heard of that chassis. One note on my part reading your question and looking at the information you posted, on the second page where all the classis's are listed there is no mention of the Windsor model. I see that the year of model is from 03 on up and Windsor's were produced until the 06 model year. So now I have questions of why a model of coach is not listed! Verrryyy interesting!
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Old 03-06-2019, 11:45 AM   #3
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Monaco listed the Roadmaster chassis models on their web site back in 2009.
It also does not list the M4R D, but lists an F4F and RR4R chassis.
I suspect the M4R D is a 4 airbag version version of the Magnum chassis on one of the smaller coaches.
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Old 03-06-2019, 01:11 PM   #4
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Quote:
Originally Posted by vito.a View Post
Monaco listed the Roadmaster chassis models on their web site back in 2009.
It also does not list the M4R D, but lists an F4F and RR4R chassis.
I suspect the M4R D is a 4 airbag version version of the Magnum chassis on one of the smaller coaches.
Like Vito, my reaction to M4R was a Beaver Magnum chassis with 4 airbags, BUT I do not know for sure.
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Old 03-06-2019, 01:13 PM   #5
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After 2002 the SMC "Magnum" chassis was discontinued. For 2001 - 2002 Monaco used the name Roadmaster-Magnum chassis for a few models (see listing below) but none with "Magnum" in the name had a four-airbag suspension (or did the Trek?). The Roadmaster "M-Series" did not start until 2003 and then was dropped in 2006.

I have a couple of different Roadmaster chassis overviews. The Windsor is on the first two sheets - the Windsor discontinued after 2006.
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Old 03-06-2019, 02:29 PM   #6
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Hi Mike; Thanks for posting those chassis info sheets. Is there a place on the web you found those or are they in your personal files? Some good info to have on hand when owners start talking about chassis identification.
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Old 03-06-2019, 03:19 PM   #7
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I have been researching this for a "Beaver Chassis History" document I'm working on.
It gets confusing in the 2001-2002 transitions period though. If anyone has any documents or info on this. let me know.

Here's what I have on the Beavers (mostly applies to Monacos too)

https://1drv.ms/f/s!AtvAXw_lfqbToxXYREK9YdBP08Jn
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Old 03-07-2019, 06:23 AM   #8
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Quote:
Originally Posted by CountryB View Post
I'm looking at the Monaco-Roadmaster VIN decoder, and I see a chassis type called "M4R D-series", does anyone know what that is? What type of chassis and on what coaches was it used?

Also, the VIN decoder (from 2003) does not have the Roadmaster RR10S chassis listed. I don't think there was a RR10R (rear radiator). Did that later VINs use the same number for the RR10S as the RR8S)?

If anyone has a coach with this chassis, what # or Letter was used in the VIN for this chassis (would be the forth position in VIN).
Mike,

I am currently sitting at a rally and there are at least 3 RR10R chassis here. They are tag axle Diplomats with a rear radiator.

Bob
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Old 03-07-2019, 06:53 AM   #9
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Bob, see if you can get the VIN number, the fourth digit (without getting shot).
I want to know if the Roadmaster VIN number is using the same digit (a "4") for the RR10 as they did for the RR8S/RR8R.

The VIN decoder I have was published for 2003 year (maybe before the RR10 was introduced). So did Monaco just add the RR10 to the RR8 VIN number, or did they use a new number?
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**Beaver History/Info/Chassis/Suspsn https://1drv.ms/f/s!AtvAXw_lfqbToxXYREK9YdBP08Jn
**Bvr/Mnco Wiring Diagrams (84-09):https://1drv.ms/f/s!AtvAXw_lfqbTm0WTuuNqpn9a8hCh
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Old 03-08-2019, 05:02 AM   #10
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Quote:
Originally Posted by CountryB View Post
Bob, see if you can get the VIN number, the fourth digit (without getting shot).
I want to know if the Roadmaster VIN number is using the same digit (a "4") for the RR10 as they did for the RR8S/RR8R.

The VIN decoder I have was published for 2003 year (maybe before the RR10 was introduced). So did Monaco just add the RR10 to the RR8 VIN number, or did they use a new number?
I will see if someone will give me their vin. The tag axle Diplomats did not come out until about 2010.

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Old 03-08-2019, 05:13 AM   #11
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In the Monaco chassis comparison charts, the RR10R is listed as an available chassis beginning in 2007.

No Beavers used the RR10R (they did use the RR10S).

Do you know what Monaco models used the RR10R (besides the 2010 Diplomat)? I supposed I can look this up somewhere. Just curious.

Of course there is no reason to believe that any chart or list put out by Monaco is going to be correct at the time it was published.
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**Bvr/Mnco Wiring Diagrams (84-09):https://1drv.ms/f/s!AtvAXw_lfqbTm0WTuuNqpn9a8hCh
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Old 03-08-2019, 12:27 PM   #12
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Our 2012 Diplomat is on thr rr10r chassis
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Old 03-09-2019, 08:47 AM   #13
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Quote:
Originally Posted by CountryB View Post
In the Monaco chassis comparison charts, the RR10R is listed as an available chassis beginning in 2007.

No Beavers used the RR10R (they did use the RR10S).

Do you know what Monaco models used the RR10R (besides the 2010 Diplomat)? I supposed I can look this up somewhere. Just curious.

Of course there is no reason to believe that any chart or list put out by Monaco is going to be correct at the time it was published.
Mike,

I believe the Diplomat was the only Monaco brand coach to use the tag axle with the rear radiator. They first appeared in 2010 after Navistar purchased Monaco. The Diplomat on a single rear axle was close or over the 20,000 pound rating for the rear axle. There is suspicion that Monaco used a 23,000 pound axle and rated it at 20,000 to avoid some DOT regulations. I weighed our 2006 Diplomat when we first got it and the rear was carrying 20,0100 pounds. We purchased the coach when it was a year old and it now has 105,000 miles on it, 93,000 of those miles were our travels which included a trip to Alaska and back. We have not had any rear suspension problems or (knock on wood) tire blowouts front or rear. Navistar probably did not feel comfortable shipping the coach with the rear axle that loaded. My friend across from me has a 2012 Diplomat with the tag and gave me he VIN number. I will PM it to you.

Bob
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