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Expert Answers about Wheel Chocks


  • How Many Chocks Come with Buyers Products 9-1/2" Wheel Chocks
  • The Buyers Products 9-1/2" Wheel Chocks with 2-3/4' Rope # 337WC9642Y that you referenced is a single set of chocks for one side of the trailer. Basically there are two yellow chocks connected by the rope. Maybe not the best way to describe it...so if you wanted a set for both sides of your trailer you'd need to order a quantity of two.
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  • Are Trailer Brakes Normally Locked Up When Disconnected from Tow Vehicle
  • Trailer brakes do not lock up when they are disconnected from the tow vehicle. They basically are free rolling until a brake controller puts amperage on their circuit which applies the braking mechanisms. Wheel chocks like what you mentioned are what's needed to keep the trailer from rolling.
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  • Can Using Drive-Up Wheel Chock Cause Tire, Wheel or Spindle Damage
  • It is very unlikely that using a drive-on ramp or leveler such as the Blaylock EZ Jack and Wheel Chock # EZ-JACK would cause tire damage. If the tire was far wider than the leveler, or not lined up correctly, and was allowed to remain on the leveler for a very long time (weeks or months) it might cause flat spots, but that would tend to even out as you drive. Given the substantial 17.5K weight of the trailer, lifting much of its weight by only one spindle could cause the spindle to bend....
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  • Does Blaylock EZ Jack Wheel Chock # EZ-JACK Require Two Per Side of Trailer
  • When using the Blaylock EZ Jack and Wheel Chock for Tandem-Axle Trailers # EZ-JACK on a tandem axle trailer you don't have to use a jack for each axle. Basically you only have to use one of these on one side of the trailer and you'd be fine. I attached a picture that shows this as well.
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  • Studs Breaking on Dual Axel Boat Trailer
  • The main reason for them breaking off is because there is too much torque on them or from having them to loose which then can create movement and eventually cause them to break. It is hard to say if the hard angle is making it to where your lugs break because of the amount of pressure being put on them. Another possibility could be a reduction in the clamp force. This could be caused by rust or dirt. It is recommended to use a wire brush to remove any rust or dirt present on the mating...
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  • Relieving Pressure From Trunnion Bars on Husky Center Line To Re-Adjust Bound System
  • The Husky Center Line Weight Distribution w/ Sway Control - Trunnion - 6,000 lbs GTW, 600 lbs TW # HT32215 sounds like it needs the head angle adjusted. To relieve some tension on your bars to remove the system, I recommend using wheel chocks and then using the trailer jack to relieve some of the tongue weight.
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  • Surge Trailer Brakes Lock Up when Backing Up on Trailer with Electric Reverse Lockout
  • If your 2006 Toyota 4Runner has a 7-Way, then the center pin on it should be the reverse light circuit. To test it you will need one other person, a circuit tester such as # PTW2993, and the vehicle wheels will need to be chocked. Basically, you will have the other person sit in the vehicle, start it up, apply the emergency brake, keep their foot on the brake, and put the vehicle in reverse while the wheels are chocked (safety first). Then you can use the circuit tester to test that center...
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  • Troubleshooting Jaws on Curt A20 5TH Wheel Hitch That Will Not Uncouple From Kin Pin On Trailer
  • If the jaws on the Curt A20 5th Wheel Trailer Hitch # C16064 are not uncoupling when you pull the handle on the hitch as indicated by indicator(see image) you may have to much weight pulling against the jaws. If you are on a hill you will want to chock the wheels on your trailer to prevent the trailer from rolling. You can then take some of the weight off of the truck using the landing gear. Have a 2nd person in the truck who can then place it in neutral and let the truck slide freely and...
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  • Trailer Tire Is Expanding Larger than the Other Tires on a 5th Wheel Trailer
  • I spoke with our resident tire expert about this issue. He believes that the tire sidewall has been pinched or otherwise damaged creating a weak spot on the inside. The air will take the path of least resistance and that's when you see bulges in the sides. I recommend replacing the tire and any tires that are showing similar signs. When replacing tires make sure all the tires are the same construction (bias or radial) the same load range, and of course the same size. If you can give me...
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  • Troubleshooting UFP Surge Brake Coupler Operation
  • The electric lockout doesn't do anything to the actuator itself, it is a solenoid that doesn't let the fluid pressurize to case the wheel cylinder or brake caliper to engage. The coupler not returning to the forward location has more to do with the Replacement Shock Absorber Spring Kit for Titan/UFP Brake Actuators # TK71-758-00. If you want to use the manual key, it won't be an issue.
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  • Disc Brakes Do Not Appear To Be Working Properly On Tandem Boat Trailer With Surge Coupler
  • It sounds like you have been testing this system quite a lot. There are several steps you can follow to trace where the problem is. First, you did not say if this is a new brake system with disc brakes and was upgraded from drum brakes. If that is the case, the actuator should have been upgraded as well. The disc brakes require a higher amount of pressure to work than the drum brakes. If you have a disc brake actuator you can move on. Next, check the calipers, and rotors for signs of...
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  • Difficulty Unhitching Sidewinder From Reese Elite Series 5th Wheel Hitch
  • I spoke with my Reese representative, who had a couple of suggestions for you. If the problem is that the jaws of the hitch keep slamming shut before you can pull the king pin free, Reese has a Technical Bulletin that addresses this issue, I'll forward the bulletin to you in a separate email. Another possibility is that you might be using the wrong wedge on your Sidewinder. The Sidewinder comes with a universal wedge that fits many different hitch set-ups, but the wedge designed specifically...
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  • Troubleshooting Brakes Locking Up In Reverse Using Tekonsha P3 Brake Controller
  • It sounds like you have a some corrosion or a short somewhere in your system and the issue is most likely not with your Tekonsha P3 # 90195. I recommend starting with cleaning your trailer connector on both the vehicle and trailer side using some sand paper or steel wool. Slight corrosion can cause power to jump from one pin function to another which may be your issue. If that doesn't solve your issue, I recommend using a circuit tester like # PTW2993 to check the functions of your brake...
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  • Loud Noise and Trailer Lurching Forward When Unhooking 20ft Travel Trailer From Truck
  • I'm assuming that the ground you're de-coupling on is flat; if there is any incline/decline, this could be contributing to what you're dealing with but you should be able to unhook a trailer on gravel without issue-especially crushed gravel since it compacts well. You also don't need to put boards under your tires during this process; if anything, you're cancelling out the ability of the gravel to help keep the trailer from rolling. With that being said, you still need to use the wheel...
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  • Troubleshooting Hard Connect and Disconnect of Sidewinder on 2004 Montana 5th Wheel Trailer
  • There are several reasons why the trailer might be hard to connect and disconnect from the 5th wheel hitch. First, check the pin weight of your trailer. If the trailer has the truck suspension compressed a great deal then the pressure between the hitch and pin box can cause disconnect to be hard. Hooking up and unhooking on level ground is also a big factor in ease of hook up. Next, check the lubrication of the fifth-wheel hitch. Make sure all of the recommended locations are lubed correctly...
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  • Slide Bar on Pro Series 5th Wheel Trailer Hitch Will Not Close when Using a Sidewinder Pin Box
  • The Pro Series 5th wheel hitch, # PS30093, is compatible with a Sidewinder. The issue could still be the universal wedge. I recommend removing the wedge and see if it hooks up fine without it. Then you should be able to get the wedge in place with a little persuasion. A Sidewinder king pin has the same standard size king pin found on any other 5th wheel trailer so the only difference is the wedge. The wedge can be oriented a few different ways like you have said so it may just be an issue...
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  • Determining if Reverse Light Circuit is Live on 2007 Jeep Grand Cherokee 7-Way Trailer Connector
  • If the 7-Way is factory installed on your 2007 Jeep Grand Cherokee, then the reverse light circuit is more than likely connected as it should be. It would be the center pin. I have included a picture of a 7-Way vehicle side connector that shows the functions. To test to see if the circuit is live or not you will need to test the center pin with a circuit tester such as # PTW2993 if you need one. Chock the vehicle wheels and engage the emergency brake and then have someone sit in the Jeep...
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  • Reverse Electric Lockout Solenoid Not Working using 7 to 4-Way Adapter on 2006 Porsche Cayenne S
  • It is possible that the solenoid on the trailer is not drawing enough power for the factory trailer connector on your 2006 Porsche Cayenne S. But first, you will want to test the reverse circuit on the vehicle connector to make sure it is working. You will need to chock the wheels of the vehicle, apply the emergency brake, and have someone sit in the vehicle with their foot on the brake while they start the vehicle and place it in reverse. Then you will use a circuit tester such as #...
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  • Correcting Slight Under Adjusted Husky Centerline Weight Distribution System
  • The Husky Center Line Weight Distribution w/ Sway Control - Trunnion - 8,000 lbs GTW, 800 lbs TW # HT32217 if under adjusted will need to have the spring bar brackets lifted. I've attached the installation instructions that include the diagrams as well as the following steps: Removing the spring bar from the lift bracket 25.Make sure the tow vehicle and the trailer are on level ground and are straight. Chock the trailer wheels, and engage the emergency brake on the tow vehicle. 26.Raise...
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  • Troubleshooting Hydraulic Trailer Brakes Not Working Properly Even When Lines are Free of Air
  • The most likely place for brake fluid to be leaking out of your hydraulic brake system is at the fittings or master cylinder. To check the fittings, chock the trailer wheels and back up the trailer so that the brakes engage. With the actuator engaged and pushing brake fluid through to the brakes, check to see if fluid is leaking out at any of the fittings. If you find any leaks at the fittings you will want to replace the fitting. If you find that none of the fittings are leaking, it...
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