Select your vehicle Make, Year, and Model, and we'll show you products engineered for your vehicle.
Trailer jacks for campers, a-frame trailers, utility trailers, horse trailers, boat trailers and more. We stock a full line of trailer jacks, jack repair parts, and trailer jack replacement parts.
Standard round jack, Topwind, 15 inch Travel, 21.0 inch Bracket to Ground Retracted, 5,000 lbs. Details
Bulldog Screw and Nut assembly includes bearing, support washer and retaining pins for 12,000 lbs. Details
Direct Weld Heavy Duty Square Jack, Sidewind, 12.5 inch Travel, 27. Details
Wide Track Jack, Sidewind, 10 inch Travel, Bolt-On, 1,600 lbs. Lift Capacity. Details
Bulldog 1.85 inch End Cap for 2,000 lbs. Sidewind Round Tube Jacks. Details
A-Frame Jack, Topwind, 15 inch Travel, 10. Details
Direct Weld Square Jack, Topwind, 15 inch Travel, 22. Details
Direct Weld Square Jack, Topwind, 15 inch Travel, 25. Details
Bulldog Velocity Series High Speed Electric Trailer Jack 185400 has 24 inches of travel, 44. Details
A-Frame Square Jack, Topwind, 15 inch Travel, 7.90 inch Bracket to Ground Retracted, 5,000 lbs. Details
Direct Weld Square Jack, Topwind, 15 inch Travel, 22.1 inch Bracket to Ground Retracted, 5,000 lbs. Details
Direct Weld Square Jack, Topwind, 15 inch Travel, 24.4 inch Bracket to Ground Retracted, 5,000 lbs. Details
Trailer Jacks will add to the convenience of owning and using your trailers. When connecting or disconnecting your trailer, the jack can be used to position the trailer tongue and allow the tow vehicle to be moved. On small trailers, this will save your back, but on more substantial and heavier trailers it would be impossible to do this without them. Trailer jacks will make storing your trailer easier as well. Supporting the trailer tongue with a jack will allow you to easily access items stored in or on the trailer and the trailer jack will keep the tongue free from dirt or damage from being left on the ground. Adding or replacing a trailer jack can drastically improve the usefulness of your trailers.
First, it is essential to identify the type of jack you will need for your trailer.
When choosing a jack, there are multiple options for weight capacity, height, and configuration so taking the time to select the correct jack is vital to ensuring the jack will function correctly and add to the usability of the trailer. It is essential to consider the ways the trailer will be used and situations that it may have been inconvenient that could be remedied by adding a jack or changing to a different jack configuration.
A-frame trailer jacks are used on trailers with A-Frame construction. An “A” frame construction trailer will have two main beams that meet at the front of the trailer where the coupler is mounted. The trailer jack will have a triangular shaped mounting bracket meant to mount behind the coupler near the point of the “A.” If the trailer previously had a trailer jack or if it was meant to have a jack there will be a flat plate bracket with a hole that will accommodate the placement of a jack if not a side frame jack can be used instead. A-frame trailer jacks are easy to replace and will be bolt-on or weld-on, and they are available in capacities of 750 to 5,000 lbs. Top crank, side crank, and powered A-frame jacks are available depending on the clearances of surrounding components. Wheels can also be added to many A-frame trailer jacks to make moving light trailers easier when they are not connected to a vehicle.
Side frame trailer jacks are typically used on trailers with straight tongues, but they will also work on A-Frame style trailers that may not have the mounting plate for an A-Frame trailer jack. Side frame mounting jacks will mount to the side of the frame near the coupler using bolt-on or weld-on brackets, or they may be directly welded to the frame depending on the style chosen. Typically, side frame trailer jacks mounted with brackets will offer a swivel function that swings the jack upwards, parallel to the trailer to keep it out of the way and away from road hazards.
There are extra features to consider when selecting a trailer jack that may make using the jack and trailer more convenient. The first feature to consider is whether a side crank or a top crank jack will be more suitable. Different trailer configurations will allow clearance for different crank styles and the correct crank location can save you from busted knuckles. There are also other more advanced options beyond the basic trailer jack.
Powered trailer jacks offer the option to have an electric motor do the cranking for you. All electrically powered trailer jacks will have a manual backup to keep you covered in the event of a power loss issue. Powered jacks are available with weight capacities to cover a wide range of trailers, from 2,500 lbs. all the way up to 12,000 lbs. Pulling power from a battery onboard the trailer will save you the effort and hassle of operating the jack and it can be beneficial for people with physical limitations that may not allow them to crank the trailer jack manually.
Drop leg jacks allow you to pull a pin that causes the support leg to drop to the ground saving you the time and effort of cranking the jack from the stored position just to meet the ground. The trailer must be supported by the tow vehicle before the pin is pulled and once the foot is on the ground (or close to it) the pin is locked into place. The cranking begins from there to lift the trailer. When storing the jack, once the weight is off the jack and fully supported by the tow vehicle the pin can be pulled and the leg retracted without all the cranking to fully retract the leg. Using a drop leg jack may save you 10”-15” of cranking every time you use the jack and are an excellent option for commercial trailers that are frequently used.
Swivel trailer jacks mount on a plate or a pipe that allows them to swing up from the ground and store parallel to the trailer frame. A swivel keeps the jack far from the ground and provides extra clearance when towing. This can protect the jack on rough or uneven surfaces that may cause the jack to strike the ground when towing. A pin securely locks the jack into its stored or usable position, so there is no mistake if the jack is ready to use.
Landing gear Are generally used in pairs and they have the highest weight capacity of all the trailer jacks. Landing gear have a high lift and support capacity, and many will have a 2-speed gearbox that can be shifted depending on the needed extend and retract speed. A higher speed will yield a lower torque so lifting a loaded trailer with the high-speed gear selected will be much more difficult. Using low speed will increase the number of cranks needed, but it will make it easier to lift.
Weight capacity is the next specification to consider. All trailer jacks will have a weight capacity rating; it may be broken down into a lift capacity and a support capacity on larger jacks. This means that the capacity that the jack can lift will be different than what it can statically support. Weight capacity is an important specification to consider with very heavy trailers as it will have a significant impact on the jacks you can use. Typically, smaller tongue mounted trailer jacks will have a single capacity that should be slightly higher than the maximum tongue weight the trailer is rated for. An undersized jack may not have the appropriate gear ratio to lift comfortably, and it may make it quite difficult for the user. Also, the longevity of a jack that is too light for the trailer will be affected, and it may not stand up to regular use.
Travel is the next specification to consider when purchasing a jack. Jacks will be listed with a retracted and extended length and some with clearance height.
Selecting the correct travel on a jack is essential for the convenience of the jack. The height must be adequate to safely store the jack and allow for you to raise it to connect or disconnect the trailer from the tow vehicle.
Match the capacity of the jack but keep in mind the surfaces that the jack will be used on and the height of the caster when selecting a caster.
Cranks and Knobs: If a trailer jack handle is left in the wrong position it can get snagged, and it may bend or break. The plastic knobs on the handle ends may degrade over time from sun exposure. Replacement handles, and knobs are available for most jacks. Having the jack model and capacity will help in finding the correct parts.
Mounts: Some trailer jacks will be directly welded to the trailer frame while others will use mounting brackets for attachment. Most jacks that use a mounting bracket will have a swivel feature that allows the jack to swing up when not in use. The jack will sit parallel to the frame and out of harms way from road debris. Many of the retaining ring brackets and swivel mounts are available as replacement parts if they are damaged, or the jack needs to be moved.
Drop Legs: Replacement drop legs are available for some jack models. Drop legs can become damaged or lost, and this doesn’t mean that complete jack will need to be replaced.
Covers: Complete replacement covers for electrically powered jacks are available if the original becomes damaged. Most of the full replacement covers will include new switches. Most of the dust covers for different ports on the jack can be replaced if lost; this includes manual override ports and gearbox access ports.
Trailer jacks can be complex and have many pieces that may wear or become lost if not properly cared for. Many internal and external components are available to replace these worn or lost parts. Having information on the jack model is extremely important for internal parts as many are specific to the jack manufacturer and model, but many external components such as pins, feet, and wheels can be found using measurements.
Wheels and feet: Trailer jack wheels and feet can be lost or damaged as a trailer gets used. In some cases, you may want to swap a foot for a wheel or vice versa to change the way you use the trailer. Keep in mind that a flat foot can bear any weight that the jack is rated for, but a wheel will limit the jack capacity to the capacity of the wheel. In many cases, this is around 1,000 lbs. When replacing a wheel or a foot the tube diameter and the attachment method are the two factors that decide fit.
Bearings and Gears: A component of the trailer jack is a wear item and may fail over time. Replacing them can save you from purchasing a complete new jack assembly. They are available for a variety of different Bulldog and Fulton jacks. Its best to locate the model of your jack to help in identifying which bearing or gear will properly fit for your application.
Using the correct trailer jack configuration will make using your trailers safer and more continent. If you have a broken jack or a jack that just doesn’t lift quite high enough, you should consider replacing it before you throw your back out trying to raise the trailer that last half inch onto the trailer ball. If you are just plain tired of cranking, a powered jack will do the work for you. Whatever your reason for adding or replacing your trailer jack we have you covered at Michigan Truck Spring. If you have questions or need assistance finding the jack you need, give us a call at 1-800-358-4751, and we will be glad to help.
They are the groundbreaker in the industry and have been making trailer products since 1920. They are used in military applications and by trailer manufacturers for decades. Their products are built with superior strength, safety and durability. For all light, medium and heavy-duty towing needs, Bulldog always delivers. They offer a wide range of products for all types of applications. Whether you have a livestock trailer, car hauler or lawn care setup, they have you covered.
Fulton has been in the trailer parts market since 1911. If you own a boat trailer or jet ski trailer, Fulton is the brand of choice. They have a complete line of products that are specifically designed for marine applications. If your trailer is going to get wet, get Fulton. They are suited for all environments and perform well under all weather conditions. Not only do they look good, Fulton jacks are designed to resist corrosion and raise and lower faster and easier than the competition.
As strong as they are we have all seen it, a broken jack handle, damage foot, etc. We carry everything from replacement trailer jack pins, drop legs, wheels, cranks to complete gearbox kits. If you jack was damaged or is just worn out we may have the part you need to get it back into service. Be sure to check out some of the videos from Bulldog on how to service and repair your jack.
Out of 5 reviews, the average customer rating for Trailer Jacks: 5 out of 5.
Read the Review