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Old 02-08-2014, 06:49 AM   #1
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Exclamation Upgrading 5,000# receiver to 10,000#? Options?

I have been searching the threads on here for 2 days now looking for info. on upgrading my 5,000# receiver on my Spartan MM chassis to a 10,000# rating for the purpose of towing a enclosed trailer. My Spartan chassis has a 10,000 GCWR, The Newmar sales Boucher states that it came with a class 2 receiver w/5,000# weight rating. I have read were some have had a weld shop "beef" their OEM receiver up, and others that have bought a new receiver rated at the 10,000#. Through out my search's I have not found anyone that lists a 10,000# receiver for a Spartan MM Chassis specifically, Where does a person find a higher capacity receiver that will bolt on to my Spartan chassis?
Any Idea's? Where does Spartan buy the receivers for their chassis? I think some of the late model chassis have come with 10,000# receivers(or higher) from the factory now?
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Old 02-08-2014, 06:59 AM   #2
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Here's an older thread which says you can't do it :(. I hope you can prove it wrong.

http://www.irv2.com/forums/f85/what-...ty-108847.html
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Old 02-08-2014, 07:00 AM   #3
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My '07 DSDP, MM chassis came with a 10K hitch, but it was recalled and replaced with a different brand. I don't recall either brand and I don't think the brand matters.

You might call Spartan and get their opinion on doubling you hitch rating.
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Old 02-08-2014, 07:47 AM   #4
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Quote:
Originally Posted by palehorse89 View Post
I have been searching the threads on here for 2 days now looking for info. on upgrading my 5,000# receiver on my Spartan MM chassis to a 10,000# rating for the purpose of towing a enclosed trailer. My Spartan chassis has a 10,000 GCWR, The Newmar sales Boucher states that it came with a class 2 receiver w/5,000# weight rating. I have read were some have had a weld shop "beef" their OEM receiver up, and others that have bought a new receiver rated at the 10,000#. Through out my search's I have not found anyone that lists a 10,000# receiver for a Spartan MM Chassis specifically, Where does a person find a higher capacity receiver that will bolt on to my Spartan chassis?
Any Idea's? Where does Spartan buy the receivers for their chassis? I think some of the late model chassis have come with 10,000# receivers(or higher) from the factory now?
I don't think you mean your Sparton Chassis with a GCWR of 10,000lbs. That is combined rate. Suspect a typo and this is the tow rating you are referring to. Knowing how close you are to your GVWR vs the GCWR and what your actual road weight is comes into play of course so I suspect you have factored that in.

Sorry can't comment on your real question of welding a stronger hitch, but this would not change the official coach ratings so there could be some legal issue with doing what you want to do. Some good references were supplied on this.

Good luck.
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Old 02-08-2014, 08:21 AM   #5
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Per Newmar spec. sheet GVWR = 31,000#(I am under the GVWR, scaled ) GCWR = 41,000#
As I understand these numbers, Do I have a 10,000# weight that I could tow?
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Old 02-08-2014, 10:19 AM   #6
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Yes, that's the way I'd read it. If in doubt call Spartan, their customer support is terrific. They will look the specs up based upon your VIN.
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Old 02-08-2014, 11:41 AM   #7
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Sounds like your coach is capable of it but your hitch is not. Solution would be to install a Class 4 hitch which is rated for 10k lbs.
Of course the frame of the chassis that comes from the chassis factory rated for 10k....might be supplemented with welded on extensions which are NOT capable of taking such a tow weight so the call to the mfr. or at least a visit to a good hitch shop for inspection seems like the next step.
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Old 02-08-2014, 01:09 PM   #8
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You said it has a 10,000 CGVW or GCVW rating (two arraingments of the same words) this is the most the entire vehicle TOW vehilce and TOWED (Trailer) can weigh.. Upgrading the receiver won't change that.
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Old 02-08-2014, 02:05 PM   #9
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Quote:
Originally Posted by wa8yxm View Post
You said it has a 10,000 CGVW or GCVW rating (two arraingments of the same words) this is the most the entire vehicle TOW vehilce and TOWED (Trailer) can weigh.. Upgrading the receiver won't change that.
If you read my post from the start........I am not trying to "change the numbers" I am just wanting to utilize the numbers that are there already, I think I am only using 1/2 of the rating........with a class 3 hitch that I have now.(5,000 lbs) I am looking at replacing the class 3 with a class 4 receiver.......I don't want to try and pull a 9,000# trailer(Trailer and contents) with a class 3 receiver.........
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Old 02-09-2014, 12:03 PM   #10
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Better look better.....

Quote:
Originally Posted by wa8yxm View Post
You said it has a 10,000 CGVW or GCVW rating (two arraingments of the same words) this is the most the entire vehicle TOW vehilce and TOWED (Trailer) can weigh.. Upgrading the receiver won't change that.
I did some studying on your Coach 2005 Damon Corporation INTRUDER - Class A | RVWeb.com and the weight's, The 377 model that you own states that you can only tow 4,000#, also depending if your Coach is at its GVWR. (Scale weighed)before over loading your chassis........
definition's explained Understanding RV Weights
My now 5,000# receiver (class 3)will not handle the 10,000# trailer(GTW).......But a new receiver(Class 4) would....
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Old 02-10-2014, 06:53 AM   #11
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My 02 MM GT chassis under 03 Winnebago Ultimate came with 10k hitch, bolted on. Not positive, but seems I recall seeing Valley brand name on the hitch. 'Course, as already mentioned, if your coach mfg added extensions, that could kill the 10k possibility.
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Old 02-10-2014, 05:34 PM   #12
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No extensions, just big massive 3/8" frame plates w/ a ton of frame bolts holding the plates in place, I have been working and have not had the chance to call Spartan and ask, as far as to why there is only a 5,000# receiver on mine.........seems a year or to later Newmar must of speced the receivers to be a little closer to the chassis ability's. In the year 2000, the Newmar brochure, "Hitch for towing car" class 2 5,000#. So right now, before talking to Spartan/Newmar, they just set this chassis up for towing a car, and not a receiver hitch for the GCWR ability of this chassis. My bolt holes on the frame plates are spaced at 6" apart c/c and have a 31-1/2" c/c measurement across. No receiver manufacture list the bolting measurements on their websites........so I am not sure other than to call a manufacture and give them my hole measurements and see what they come up with. Thank you all for your reply's, and anymore help would be appreciated .
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Old 02-10-2014, 07:28 PM   #13
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UPDATE:
Called Spartan tonight, The receiver was installed as requested by Newmar for "car towing" purposes only, if I am under the chassis GCWR I am good to go to the class 4 receiver. As long as I stay within the numbers provided I am ok to upgrade to a class 4 receiver. The gentleman said "it is all about the numbers" and as long as you stay within them you can do as you please.
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Old 02-11-2014, 02:25 PM   #14
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These have been posted before, but here are some more numbers for you.

The tow rating is the lower of:

1. GCWR minus tow vehicle's actual weight.

2. Hitch capacity.

3. Coach tow rating.

4. Chassis maker's tow rating.
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