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Old 04-06-2014, 09:46 AM   #1
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Converting 5k hitch to 10k?

Can you convert / beef up a 5000lb hitch to a 10000lb hitch legally?

The coach I'm looking at has a 5k hitch and my truck ways 5600 lbs.
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Old 04-06-2014, 09:54 AM   #2
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My 2000 Newmar is rated at 5K by the Newmar factory. I spoke w/ the Sparten rep and my chassis vin is rated by Sparten at 10K hitch. Keeping in mind your GVWR, NCC and hitch load rating, etc converting to a 10K hitch involves switching the 5K for a 10K rated hitch based on frame rail dimensions, etc. Cost to upgrade mine is about $400 for a new 10K hitch. Ed
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Old 04-06-2014, 11:37 AM   #3
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The hitch is only part of the towing equation.

Work the numbers, 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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Old 04-07-2014, 05:39 PM   #4
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Hi Still Workin,
To determine the coach's capability to tow weight, to this math:
GCWR - GVWR = maximum towing weight
There is a lot involved with these numbers. brakes, chassis, engine, etc. Consider not exceeding the number you get from this formula.
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Old 04-08-2014, 08:13 AM   #5
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I recently contacted Sparten and spoke w/ Charlie Fisher - Senior Technician w/ Sparten. I wrote:

"As I understand Sparten rates this chassis (2000 NM DSDP 3859) at a 10K hitch capacity. Newmar specifications sets it at 5K. The Newmar GCWR is 37400 and the GVWR is 27400. Can I not put on a 10K rated hitch?"

His Reply:

"Yes, the chassis is rated to be able to tow 10 K. So if it is equipped with a 10K hitch you would be good to go!"

Although I am not going to tow 10K the upgraded hitch gives me an extra level of safety. Every little bit helps. Ed
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Old 04-09-2014, 12:02 AM   #6
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Quote:
Originally Posted by edaa53 View Post
I recently contacted Sparten and spoke w/ Charlie Fisher - Senior Technician w/ Sparten. I wrote:

"As I understand Sparten rates this chassis (2000 NM DSDP 3859) at a 10K hitch capacity. Newmar specifications sets it at 5K. The Newmar GCWR is 37400 and the GVWR is 27400. Can I not put on a 10K rated hitch?"

His Reply:

"Yes, the chassis is rated to be able to tow 10 K. So if it is equipped with a 10K hitch you would be good to go!"

Although I am not going to tow 10K the upgraded hitch gives me an extra level of safety. Every little bit helps. Ed
Just a word of caution here, but I think the Spartan rep's comment ASSUMES the hitch is attached directly to his chassis. This is not always true. On my 2003 Kountry Star, Newmar had welded an "extension" to the chassis rails and then bolted a prefab hitch to their extension. IMO, that extension was the weakest link in that "chain". I'm just saying that simply bolting on a heavier duty hitch could have been dangerous.
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Old 04-09-2014, 09:36 PM   #7
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There is a reason a coach comes with a 5K hitch instead of a 10K. It would be best to talk to the coach manufacturer and not the chassis manufacturer about the hitch.
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Old 04-10-2014, 08:22 PM   #8
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X2

Our coach built on Gillig chassis with a sticker indicating 3500 limit.

Called gillig and they stated it could pull a house.

Called cc and they stated the sticker is what it is and we could check with an engineer.

Our f250 is rated 12.5 k and everything is a lot smaller than to coach.

We currently just have a storage box in
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Old 04-13-2014, 05:11 PM   #9
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Hi edaa53,
The short answer is yes, with the numbers you provided the 10K hitch should be okay. Now there is no free lunch. Please load the coach for travel (full water, fuel, empty holding, food cloths and people), hitch the toad and go get the coach weighed. Are you under the GVWR? Then you are okay to have the 10K receiver.

Newmar installs many items on the chassis. Some are purely for cost reasons. My view this is one of those times.
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Old 04-14-2014, 06:38 AM   #10
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Hi GaryKD - I agree with your points. I will install the 10K rated hitch for safety over the 5K. The GVWR is the coach number. Then the total coach ready to roll, hitch load and tow vehicle weight needs to be under the GCWR. Thanks. Ed
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