Recommended Pin Box Replacement For Venture Short Pin Box

Question

Question:

I am looking for a pin box extension for my 2001 united uxt fifth wheel trailer. It is a triple axle unit with three 8k dexter axles and g rated commercial tires. Its rated to 24k lbs. it currently weights approximately 13,500 and will be close to 20k when we get done remodeling it. It has a short box style pin box that is 12x12inches on the inside diameter and the bolt holes are 7.75-8 inches apart and have four rows of holes every 2 inches up the pin box. Pin is centered between the holes, or at the 4 inch mark. I am trying to find out what pin box this is so we can add an extension to the front. The trailer is being connected to a 2006 ford f550 cab and chassis with a steel flatdeck on the rear. I have one of your Reese 30k fifth wheel frame mounted hitches on the deck. Our problem is that we need about ten more inches of space where the corner of the flat deck pivots under the trailer. Can you help me figure out what pin box we have and what you might have for a heavy duty pin box extension that would be rated for at least 20-24k lbs?

asked by: Paul B

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Expert Reply:

I have attached a help article for you to confirm size, but based on what measurements you gave, I am fairly confident you have a Venture Short Pin Box. We only have one pin box replacement for that, and I am very pleased to say that it will meet your needs.

I recommend for your trailer the Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs # UF35-946219. This is a direct replacement for your OEM pin box that is an air-ride-equipped model. The interior air bag absorbs road shock so that you won't feel it. There is a built-in spring that ensures the pin box rebounds, keeping the air bag from breaking down. This will improve the handling and overall ride of your trailer by limiting strain on your truck and trailer frames. It has a 21,000 lb weight capacity which is the highest we offer. This will give you far more than the 10 inches of space you need.

expert reply by: Jason S

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Answer 1

There are two pin boxes we offer that can be used as replacement for your Venture CJ13517 pin box and only one of them is rated for your application on a GVWR of 17000-lbs. Because of this you will need to use the Trailair Air Ride 5th Wheel King…

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Answer 2

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 3

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

The absolute best cushioned equalizer that fits the dimensions you mentioned having would be the MORryde ALLTREK 4000 part #MR89DR as this is only option to provide vertical and horizontal cushioning. This would make a big difference and you'd be…

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Answer 6

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 7

It looks like your MORryde ALLTREK 4000 Shock Absorbing Equalizers #MR89DR are longer than your previous equalizers were because your leaf springs are way too close to each other. The shackles should be creating more of a "W" shape instead…

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Answer 8

Hey Doug, thanks for reaching out! The MORryde ALLTREK 4000 #MR89DR dimensions can be a bit difficult to explain via text so I've attached an image giving you the dimensions you're asking about!

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Answer 9

I spoke with my contact at Trailair and from your serial number we were able to determine that your trailer came with a 1621 HD pin box which is a long pin box style. I was unable to obtain the exact part number for your Trailair pin box but from the…

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Answer 10

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 11

I understand your worry Tom, and I have a couple recommendations. First is the MORryde ALLTREK 4000 Shock Absorbing Equalizers #MR89DR which has a height of 4-1/2" for the mounting bolts. This is also 6-1/2" in width like the shorter…

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Answer 12

We do have the Rhino-Rack Masterkey Lock Barrels #RRRK093-2 which will provide you with 2 new lock cores and keys for your Rhino-Rack Zenith MasterFit Rooftop Cargo Box #RRRMFZ66. As far as pricing goes on the different sets they can change based on…

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