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Expert Answers about King Pin Locks


  • Are etrailer.com 5th Wheel Trailer King Pin Lock Keys Keyed All the Same
  • The etrailer.com 5th Wheel Trailer King Pin Lock comes with keys that are specific to each individual king pin lock, so you don't have to worry about someone using his King Pin lock key to open yours. I have linked you to a product demonstration video for the # e98896 that you might find helpful.
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  • Can etrailer 5th Wheel King Pin Lock be Ordered With Specific Lock Number
  • The etrailer.com 5th Wheel Trailer King Pin Lock # e98896 cannot be ordered with a specific lock number to match what you currently have. What you can do if you want all of your king pin locks keyed alike is order order as many as you need of this lock and select the "Keyed Alike" option on the drop down box. I have added a link to a video review of this lock for you to check out as well.
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  • Sidewinder as Replacement for Fifth Wheel Trailer King Pin
  • The Sidewinder replaces the pin box which also includes the king pin. The Sidewinder is an extended pin box, but it gains the extension not just by being longer in length. The Sidewinder relocates the pivot point between the hitch and the trailer from where the king pin locks into the hitch to the point where the pin box attaches to the trailer. The king pin will no longer rotate in the hitch jaws. This relocation will gain you an additional 22 inches of clearance between the front of the...
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  • Can Reese Sidewinder be Locked Out to Use as Standard King Pin
  • Yes, if you lock out the Reese Sidewinder # RP77FR it will be a standard king pin and you can use it with the Andersen.
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  • Theft Prevention Recommendations for a 5th Wheel Trailer
  • You could remove your breakaway switch pin while your trailer is in storage, however, a determined thief will get what they want in the end. If he went through the trouble to break in and attempt steal your trailer, it would not be a problem for him to simply cut the wires from the breakaway switch. Cutting the wires from the breakaway switch would be fast and easy. Another factor to consider is that the battery will only last for a short time and it will drain completely. Leaving the...
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  • Is There A Master Key for the Ultra-Fab 5th Wheel King Pin Lock?
  • No, there is no master key for the Ultra-Fab 5th Wheel King Pin Lock # UF48-979008 so no one will be able to just come by and take it off. The only way they'd be able to remove this is to use the provided keys.
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  • Ultra-Fab UF48-979008 Lock Won't Fit on King Pin With Lube Plate Installed
  • Other than removing the lube plate (which you understandably don't care to do), if I were in your situation, I'd use an angle grinder to take a small amount of material off of the sleeve of the # UF48-979008 king pin lock to reduce its height. If you were to take about 1/8 of an inch off the height of the sleeve, it will work just fine with a lube plate.
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  • Is It a Good Idea to Lock Out Reese Revolution?
  • I'm not sure what you mean by towing would be better, but I do not see how that would be accurate or how moving the pivot point to the king pin would be an upgrade. At the very least you would need a sliding hitch with your 6-1/2 foot bed if you locked out your Revolution, though I strongly recommend continuing to use the Revolution as is. There would be no way for me to know what the turning radius is though we do have a formula you can use: (A + B) - C = Clearance A = Distance from...
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  • Reese Fifth Wheel Hitch When Double Jaw Wrapped Around King Pin What is the Maximum Allowable Gap
  • I have confirmed with my contacts at Reese and the double jaws that secure the kingpin in-place on the Pro-Series PS30119 are elliptical in shape. Due to this elliptical shape the jaws will not completely close around the pin when hooked up to the trailer and a small gap is common. A gap of approximately 1/8 of an inch is well within in tolerance limits. Unfortunately my contact could not supply any additional gap measurements that indicate if the hitch was out of tolerance. If you have...
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  • Shape of Trailair Rota-Flex King Pin
  • The king pin on the Trailair Rota-Flex 5th Wheel Pin Box # LC328330 features an industry standard king pin. I have attached a photo showing what an industry standard king pin. The photos show the pin box from several different angles and the entire kind pin is not visible in every photo.
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  • Is Construction Of Curt E16 Fifth Wheel Hitch Reliable When Towing
  • The curt E16, part # C16115 has been engineered and tested with the weight capacity of 16,000-lbs. Your concern about the welds breaking would be a concern if you were towing a trailer that has more weight than what the hitch is designed to handle. While I understand your concern over the hitch and it failing, it has been tested to be able to handle the capacity listed for the hitch and I do not think the weld will be an issue for you. You may want to consider a more heavy-duty hitch...
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  • Purpose of Nut and Bolt on Front of Demco Hijacker 5th Wheel Hitch
  • I'm unsure of which bolt and lock nut you're speaking of. If you're speaking of the bolt directly under where the king pin would ender the head of the hitch, that bolt is used to join the fifth wheel's head to the leg cross member. Please let me know if you're talking about a different bolt.
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  • Weight of Buyer's Products Forged Trailer King Pin 337KP20038
  • The Buyer's Products Forged Trailer King Pin, part # 337KP20038 weighs 11 lbs with a shipping weight of 13 lbs.
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  • Bolt Size Needed For Buyers Products 2 Inch Forged SAE Trailer King Pin 337BKPT809B
  • The bolts do not come with the Buyers Products 2" Forged SAE Trailer King Pin with 1/2" Bolster Plate - Bolt On # 337BKPT809B. So I did check with the manufacturer, Buyers Products, and they told me the bolts needed to be 1 inch long x 1/2 inch. As far as procedure, there isn't one I can offer as it will differ depending on the application and is a project for professional fabricators. As for which is better, this bolt-on has the exact same specs as the weld-on # 337KP20050 king pin...
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  • Weight of Reese M5 5th Wheel Hitch For 2021 Ford Super Duty With Factory Puck System
  • I checked directly with Reese for you and found out the total weights of each of the Reese M5 5th wheel trailer hitches that fit a 2021 Ford Super Duty, and I'll list those for you: - 148 lbs: Reese M5 5th Wheel Trailer Hitch for Ford Towing Prep Package - 20,000 lbs # RP30921 - 148 lbs: Reese M5 5th Wheel Trailer Hitch for Ford Towing Prep Package - 27,000 lbs # RP30922 - 162 lbs: Reese M5 5th Wheel Trailer Hitch for Ford Towing Prep Package - 32,000 lbs # RP68FR The M5 is a fantastic...
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  • Is A Wedge Kit Needed When Using The Curt A16 With Slider Base
  • I believe you're talking about using a Sidewinder wedge kit like # C16992, which you would not want to use with the Curt A16 5th Wheel Trailer Hitch w/ R16 Slider # C16521. The purpose of the wedge is to lock the king pin of the 5th wheel's pin box in place when using a rotating pin box. This moves the pivoting point back to give you more turning clearance. With a sliding hitch you can't use a rotating pin box like the Sidewinder and would need to use the lockout bolts in the back of the...
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  • Measurements For The MoRyde Cushioned 5th Wheel Pin Box
  • The MORryde Cushioned 5th Wheel Pin Box for 18K to 23K Trailers w/ Lippert 1621SHD # MR24VR is 12 inches wide, 17-3/4 inches from the center of the king pin to the first set of bolt holes and 25-5/8 inches from the center of the king pin to the second set of bolt holes. The king-pin will be the same distance that the factory Lippert was at too.
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  • How To Clean And Lubricate The Wear Plate On A Reese Sidewinder King Pin Part # 5AS16K
  • Per the instructions for the Reese 5th Airborne Sidewinder Standard Arm with King Pin part # 5AS16K, in order to clean and lubricate the wear plate, you must first remove the turret. This can be done by removing the 4 5/8" cap bolts from the top of the pivot arm followed by the 2 3/4" convertible bolts located on the bottom side of the king pin. Once done, you will have to use a pry bar to remove the sleeve around the pivot arm, be careful not to scrape or nick the pivot arm upon disassembly....
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  • How To Determine What Sidewinder Will Replace 2012 Heartland Express Pin Box
  • The best way to find out if the Sidewinder, part # RP34FR will fit your Heartland Express is to have the part number of the king pin you have installed. If the numbers are not visible and if it is the original king pin, you may be able to use the VIN of the trailer and check with the retailer who sold it. They would have a list of all the components that were installed on the trailer. If that doesn't work you can use the attached helpful article and measure the pin box you have to determine...
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  • How Much Clearance Should There be Between Tailgate and King Pin on 2005 Dodge Ram Truck
  • That is a good question and the answer is still that it is best to have 6 inches of clearance all the way around, including from the tailgate to the king pin box. I appreciate the photo you sent as that makes it clear how little room you really have. While you are correct that when turning you are probably fine, the issue is when you encounter any types of rough roads or bumps or if you are driving and have to deal with a sharp incline - 2 inches is not enough and your truck's tailgate...
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