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Expert Answers about Wallace Forge

  • Can I Tow a 5th Wheel Travel Trailer with a Semi Truck or 18-Wheeler
  • The king pin dimensions are the same between fifth wheel trailers and large commercial trailers. Both types of trailers use a standard 2 inch king pin. Semi trucks were not technically designed to tow camping style fifth wheel trailers, so there are several factors that you will want to take into consideration before attempting to tow. First, you will want to make sure the truck can tow the trailer level. Towing the trailer with the nose too high or too low can cause issues with sway,...
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  • What are the Dimensions of the Fifth Wheel Trailer King Pin # T809
  • What you are describing sounds like a pin box. The part that is angled up would be at the front so when you hitch up to the 5th wheel hitch the skid plate on the hitch and pin box will make contact with each other. All of these parts are made of steel, like # T809. The upper thickness of T809 is 7/8 inches overall but where it gets welded to the trailer is 1/2 inch thick. I have included a picture that shows the measurements of the king pin for you.
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  • Replacement Trailer King Pin Recommendation to Replace a Broken/Loose King Pin
  • If you have a broken or loose king pin on your trailer it is time to have it replaced. I would recommend you get the Wallace Forge Kin Pin part # T809 that you referenced and have a qualified welder install it on your trailer. Another solution would be to replace the pin box. If you get me your pin box brand and model number I can help you pick out a replacement pin box.
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  • What is the Maximum Amount of Wear a 5th Wheel Trailer King Pin Can Have Before Replacement
  • Typically the max wear on a king pin is .080 of an inch with a minimum diameter of 1.920. DOT says the max wear is .125 of an inch with a minimum diameter of 1.875. When new the king pin will have 2 inches of diameter.
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  • What are the Dimensions of the Bull Dog Gooseneck Coupler and the Gooseneck to 5th Wheel Adapter
  • My recommendation is to use the # 2085205-DR Gooseneck to Fifth wheel Trailer Adapter for your situation. This will provide easy adjustment at 2-1/2 inch intervals with the included pin locations. As you requested the measurement from the top of the gooseneck coupler to the 8 inch fifth wheel adapter plate will be 28-1/2 inches in the maximum extended length pin location, and 21 inches in the minimum retracted pin location. Furthermore, when using the gooseneck to fifth wheel adapter...
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  • Can a Trailer hitch Ball be Used with a Lunette Ring
  • You do not use a ball with a lunette ring. You would use a pintle hook such as # TR63043 (fits a 2 inch receiver). A ball would not be used because the ring could just come up and off of the ball. The only exception is something like # TR63041 which is a pintle hook combo.
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  • Can a 5th Wheel King Pin Adapter be Installed on a Big Tex 22GN Gooseneck Trailer
  • I looked up the Big Tex 22GN Gooseneck trailer and see that it has a square tube coupler. We do have an adapter, inner tube only, for square tubes, # BD0289650300. The tube is 4 inches wide on the outside. It uses holes for pins or bolts though so if the inner tube on the trailer now doesn't fit the same way then either the outer tube would have to be modified with permission from Big Tex or the adapter would have to be welded on and again with permission from Big Tex. There are other...
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  • Dimensions of the Wallace Forge Fifth Wheel King Pin, # T809
  • I went out to the warehouse to measure a Wallace Forge Fifth Wheel King Pin, # T809. From the bottom of the plate to the end of the king pin it measures 3-11/16 inches. It has an overall height of 4-5/8 inches. The base has a diameter of 8 inches.
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  • What is the Plate Thickness at the Base of the Fifth Wheel Trailer King Pin # T809
  • The plate at the base of the Fifth Wheel Trailer King Pin, item # T809, where it is welded to the trailer is 1/2 inches thick. From the top of the base to the bottom the thickness is 7/8 inches. I have added a dimensions to a photo for you to explain the measurements I took.
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  • Version of Gooseneck to 5th Wheel Trailer Adapter # 2085205 that has Holes Drilled
  • I checked your order notes and what you ordered is the part # 2085205 which does not have holes drilled. If you needed the version of this that does have holes drilled the correct part number is # 2085205-DR.
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  • What are the dimensions of the Weld Plate On the Weld on Fifth Wheel King Pin
  • The weld plate is 8 inch diameter and 1/2 inch thick on the T809 weld on Fifth Wheel Trailer King Pin. The composition of the steel and a load rating are not given. The manufacturer does not specify the load rating due to the weld on configuration and the fact that it greatly depends on what it is welded to and how and where.
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  • Safety Chains Required When Using An Adapter to Tow Gooseneck Trailer w/ A 5th Wheel Hitch
  • I've spoken with a few of my towing industry contacts, who tell me that even if you use an adapter like the # 2085205-DR, safety chains should still be used. If the fifth wheel hitch you are using is compatible with industry standard bed rails, then you can use part # RP50223 to provide an attachment point for the safety chains. To prevent the chains from snagging on anything, you'll need to ensure that the safety chains are long enough to allow the trailer to make turns, but no longer...
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  • Adapter to Allow Truck with 5th Wheel Hitch to Pull a Gooseneck Trailer
  • Yes, there are adapters made that will allow a vehicle with a 5th wheel hitch to pull a gooseneck trailer. Most of these adapters, such as # 2085205 from Wallace Forge, adapt the trailer's gooseneck coupler to match the truck, but we also offer adapters like the Curt # 16055 that adapt the truck. This unit replaces the hitch and fits into the same industry-standard base rails. The link provided will let you view all such items and the included article explains the different types that...
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  • Installation of Wallace Forge Gooseneck to Fifth Wheel Trailer Adapter # 2085205
  • The Wallace Forge King Pin Adapter for Gooseneck Trailers you mention, part # 2085205 is designed to slip into the outer coupler tube of a gooseneck trailer. The set screws in the coupler tube would secure the adapter at the correct height, as you can see by the photo I provided. The king pin portion of the adapter would lock into the jaws of the fifth wheel hitch just like the king pin of a fifth wheel trailer would. The king pin would not be welded to the hitch. If you wish to install...
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  • Low Profile Fifth Wheel Hitch Recommendation for a Heavy Duty Truck with Flat Bed
  • For your setup you are going to have to find someone local to you fabricate a hitch for the vehicle. We don't offer gooseneck or fifth wheel hitch fits for the F-450 or F-550 so nothing we offer would be a direct bolt on, nor do we have anything that would fit the flatbed without major modification. Since most likely the bed of the truck sits up higher than a standard bed truck you would want the low profile fifth wheel hitch part # RP30054 as it is about 5 inches shorter than most fifth...
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  • Could the Gooseneck to 5th Wheel Trailer Adapter # 2085205-DR Fit a Big Tex 14GN Trailer
  • If your Big Tex 14GN has a gooseneck coupler outer tube that is designed to fit an inner tube with an overall diameter of 4 inches the Gooseneck to 5th Wheel Trailer Adapter # 2085205-DR would be a fit and would work well for you to convert the trailer to be towed with a fifth wheel hitch.
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  • Would the Wallace Forge King Pin Adapter for Gooseneck Allow a Fifth Wheel Semi to Tow Gooseneck
  • The Wallace Forge King Pin Adapter for Gooseneck Trailers you mention, part # 2085205 is designed to slip into the outer coupler tube of a gooseneck trailer and allow it to be connected to a fifth wheel hitch. The king pin dimensions are the same between fifth wheel trailers and large commercial trailers. Both types of trailers use a standard 2 inch king pin. Semi trucks were not technically designed to tow camping style fifth wheel trailers, so there are several factors that you will...
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  • What is the Upper Coupler Thickness of this Wallace Forge Fifth Wheel King Pin # T809
  • This Wallace Forge Fifth Wheel King Pin, part # T809, has a upper coupler thickness of .38 inches. I went out into our ware house and measured to be sure. The other model # T809 king pins from Wallace Forge have different upper coupler thicknesses have letters after the part # that designate the upper coupler thickness.
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  • Parts Available for Converting a Gooseneck Trailer for a Fifth Wheel Hitch
  • We do have a couple adapters that will take your gooseneck trailer to a fifth wheel king pin. It is part # 2085205. The tube is 4 inches outer diameter round so if you have an adjustable gooseneck, this part will slip right in. If you have a square tube gooseneck, you could use part # KP84HB. This tube is 4 inches square.
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  • Can Wallace Forge Gooseneck to Fifth Wheel Trailer Adapter # 2085205 be Used With a Semi Tractor
  • Since the 5th wheel hitches on your semi and pickup both are designed for use with industry-standard 2-inch king pins either one can be used to maneuver your goose neck trailer as long as the trailer does not exceed the towing capacity of either hitch or your tow vehicle. According to the Big Tex website the 14GN has a gross vehicle weight rating (GVWR) of 14,000-lbs. The Wallace Forge adapter is rated for 30,000-lbs so it is more than up to the task. Double check your pickup truck specifications...
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  • Can A Fifth Wheel Be Used With An Inverted Fifth Wheel On A Trailer Using A Fabricated Dual King Pin
  • This is the first time I have heard of the issue you are describing. It sounds like there is an inverted fifth wheel hitch on the trailer you are trying to deal with. The best solution I could recommend would be to remove the inverted fifth wheel on the trailer and install a king pin like part # T809. I am not certain about the legality of the dual fifth wheel hitches being used with a fabricated dual king pin. You will need to check with the Department of Transportation in the...
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  • Measured Dimensions Of Lunette Ring And Bracket # 1812XL
  • I pulled a Trailer Lunette Ring part # 1812XL from our warehouse and took a few measurements for you. I have attached a couple of photos that show the dimensions. The overall height of the bracket measures 11-3/4 inches. The mounting holes are 6 inches apart, and the bracket is 3-5/8 inches wide. The six holes on the side are spaced 2 inches apart and the depth of the bracket is 2 inches. With the Lunette ring attached, the depth of the ring and bracket is 7-3/4 inches. The ring inner...
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  • Shaft Measurements of the Wallace Forge Fifth Wheel King Pin
  • I pulled the Wallace Forge Fifth Wheel King Pin, part # T809, from my warehouse and measured the different diameters of the shaft. The bottom portion diameter measures 2-13/16 inches, the middle portion measures 2 inches and the top portion measures 2-7/8 inches. I have included an image containing all of the measurements plus more that may be helpful.
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  • Dimensions of the Replacement 3 Inch Lunette Ring - 20K, # 16137
  • I went out to the warehouse to measure a Replacement 3 inch Lunette Ring - 20K, # 16137. The overall height of the mounting portion is 3-1/2 inches. The overall width of the mounting surface is actually 2-13/16 inches. The center to center distance of the mounting holes is 2 inches. The holes are 5/8 inches in diameter. From the back of the mounting surface to the end of the ring is 7-3/8 inches. The outside diameter of the ring is 6 inches. The ring is 1-1/2 inches by 1-1/4...
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  • Adapter Recommendations to Tow a 5th Wheel Trailer with a Gooseneck Trailer Hitch
  • There are a couple of options for you to tow the 5th wheel trailer with the gooseneck hitch. If you have a Curt Double-Lock, Flip and Store gooseneck hitch, you could use the Curt X5, # C16210 and put a 5th wheel hitch in the rails. Or if you have a B and W square shank turnover ball hitch, use # 16310. If you do not have either of the gooseneck hitches listed above, you will need to use an adapter on the 5th wheel trailer to tow it with a gooseneck hitch. Rails cannot be installed in...
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  • 5th Wheel to Gooseneck Adapter Recommendation
  • It sounds like you are wanting an adapter to be able to tow your fifth wheel trailer with a gooseneck hitch. If this is correct, the best option would be to replace your current pin box with a Reese Goose Box, like part # RP94622, which features an adjustable air bag and dual shock absorbers to create a smooth, cushioned ride and reduce stress on the trailer frame. The Goose Box is approved by Lippert, a major trailer frame and pin box manufacturer, and will not void their trailer warranties....
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  • Will a 2-13/16 Inch Wide Lunette Ring Fit in a 3 Inch Wide Channel on a Dump Trailer
  • I completely understand your reservations about the gap between the ring and the channel. The Lunette Ring, # 16137, does have a mounting surface that is 2-13/16 inches wide, but it needs to be this size to fit in the 3 inch channel. All of the lunette rings that come with a channel have this small gap. The ring in question is 0.1875 inches smaller than the 3 inch opening on your channel. That would be 0.09375 inches on either side, less than a tenth of 1 inch. Once you install the ring...
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  • Will the Gooseneck to Fifth Wheel Trailer Adapter Fit My B and W Fifth Wheel Hitch
  • I went out to the warehouse and measured the king pin and the recessed part of the kingpin on the Gooseneck to Fifth Wheel Trailer Adapter, part number 2085205, is 2 inch in diameter. The outer flange on this item is approximately 2-7/8 inches. This item should fit your B & W fifth wheel hitch. Checkout the video that shows the exact measurements.
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  • Welding Lunette Ring Channel Coupler to Older Trailer
  • The Wallace Forge Lunette Ring Coupler with Channel Bracket, part # 18128XL is designed to be a weld-on application, so you can certainly weld it onto your trailer. In order to retain the 12,000 lb capacity, I would recommend having a professional who has experience welding trailer-type applications do the job for you.
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  • Does the Wallace Forge Gooseneck to Fifth Wheel Trailer Adapter # 2085205 Have Holes for a Pin
  • The Wallace Forge Gooseneck to Fifth Wheel Trailer Adapter, part # 2085205, does not use any holes. It is designed to be used with the set screws that are on the gooseneck trailer. The adapter does not need any holes when using set screws. The set screws are made to tighten against the tube to hold it in place. When a gooseneck to fifth wheel adapter has holes in it it will use a load bearing pin that will slide through the hole on the gooseneck trailer and the adapter. It will still...
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