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Bulldog
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Always the correct part
We know our products
Quality Products
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BULLDOG round jacks are recognized as the industry standard by leading agricultrual, commercial, horse, livestock, and other trailer manufacturers. For more than three quarters of a centruy, BULLDOG jacks have been demonstrated to be the most reliable, field-proven jacks on the market.
| BRAND: | BULLDOG |
| PART NUMBER: | 1750290317 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 13 LBS |
| CAPACITY: | 5,000 LBS. LIFT |
| TRAVEL: | 15 IN. |
| RETRACTED: | 10.82 IN. |
| EXTENDED: | 25.82 IN. |
| CLEARANCE: | 10.5 IN. |
| MODEL NUMBER: | TWL 175 |
| HANDLE STYLE: | TOPWIND |
| MATERIAL: | STEEL |
| WHEEL: | NO |
| ATTACHED WHEELS: | NO |
| CYLINDER DIAMETER: | 2.25 IN. |
| SPEEDY LIFT: | NO |
| COLOR: | GRAY |
Founded in 1920, Bulldog has become the standard for heavy-duty trailer connection hardware in agricultural, military and utility service. The line covers gooseneck hitches and couplers, A-frame and channel-mount trailer couplers with the Wedge-Latch mechanism, and heavy-duty jacks, built for unmatched strength, reliability and safety under demanding loads.
Bulldog was founded in 1920 and has spent more than a century supplying the connection hardware that heavy trailers depend on. Its market has always been the demanding end: agricultural, military and utility applications where a coupler failure is not an inconvenience but a serious incident. The brand summarises its position as Tough and Tested, and it sits within the Horizon Global towing group alongside Reese, Draw-Tite, Fulton, Tekonsha, Bargman and Wesbar.
Gooseneck equipment is the brand's signature. Gooseneck hitches mount in the truck bed over the rear axle, which places the load where the chassis can carry it properly and allows far tighter turning than a receiver hitch permits. Matching gooseneck couplers attach at the trailer end, in round tube and square configurations across the capacity range used by livestock, equipment and flatbed trailers.
The conventional trailer coupler range is built around the Wedge-Latch mechanism, which uses a wedge to take up wear between coupler and ball rather than relying on a fixed clamp that loosens over time. That matters on a trailer accumulating hard miles, where slack in the coupling shows up as noise and shock loading. Couplers are offered in A-frame form for standard tongues and in channel-mount form for straight tongue and fabricated frames, with adjustable channel versions that let a coupler be positioned to suit the tongue height.
Heavy-duty jacks complete the line, sized for the tongue weights that gooseneck and equipment trailers generate. Across the range the emphasis is consistent: forged and heavy-section components, load ratings backed by testing, and hardware specified for agricultural, military and heavy-duty commercial use rather than occasional recreational towing.
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A tongue jack is a mechanical device mounted to a trailer tongue that raises and lowers the front of the trailer for coupling, uncoupling, and ground clearance. The manual covers multiple types: rack jacks, side-wind and top-wind handle models, and optional accessories including drop feet, drop legs, and caster wheels. The jack is designed for vertical loading only.
No. The manual explicitly states: 'These jacks are not designed for mounting to round tongues.' You must have a flat or rectangular tongue for proper installation.
The manual covers five main mounting styles: (1) Bolt-on rack jack, (2) Bolt-on mounting bracket, (3) Snap ring, (4) Bolt-thru, and (5) A-plate (for trailers with A-plate couplers). Additionally, direct-mount and weld-on pivot tube options are available. Choose based on your trailer type and coupler configuration.
No. A-plate jacks are designed specifically for trailers with A-plate couplers. The manual states: 'A-plate jacks are designed for mounting to trailers with A-plate couplers.' If your trailer has a different coupler type, you will need a different mounting style.
The manual specifies that supplied bolts are included for insertion into holes corresponding to your tongue width. Locknuts are also provided. The exact number and size of bolts depend on your specific tongue width, so verify the correct mounting hole pattern before installation.
The manual does not specify required tools for bolt-on installation. However, you will need a wrench or socket to tighten the locknuts to the specified torque of 25 ft. lbs. For weld-on installations, an AWS certified welder is required.
Before mounting, confirm there will be no interference from the tow vehicle, tongue, ground, or any other mounted accessories while stationary or in motion. Check for interference in all positions, including handle swing and swivel positions if applicable. After installation is complete, check for interference again. Specifically verify clearance of the handle, trailer light cables, and coupler.
1) Place the gear housing on the tongue and insert the supplied bolts into holes corresponding to your tongue width. 2) Place the mounting bracket below the tongue with the flat surface against the tongue. 3) Secure with locknuts and torque to 25 ft. lbs. After installation, verify clearance of the handle, trailer light cables, and coupler.
1) Place the jack against the tongue and position the mounting straps on the opposite side. Align the holes in the mounting bracket with the holes in the mounting straps. 2) Insert the 4 bolts through the mounting bracket and mounting straps. The upper bolts should rest on the top of the tongue; the lower bolts should be less than 1/16 inch from the bottom of the tongue. 3) Secure with locknuts and torque to 25 ft. lbs. 4) Check for clearance of handle, trailer light cables, and coupler.
1) Place the jack bracket over the mount and place the snap ring in the groove. 2) Seat the snap ring fully into the groove. Before installing, inspect the snap ring groove and remove any debris to ensure proper seating.
1) Place the jack bracket into the recessed opening on the mount. 2) Place the small end of the bushing into the jack bracket and onto the bolt. 3) Tighten the locknut until there is little movement in the bushing. Note: The bolt should be installed between the trailer tongue and mount; the jack bracket will be held by the bushing between the locknut and the mount.
For A-plate jacks on A-plate couplers: 1) All welding must be performed by an AWS certified welder. 2) If the A-plate is separate from the jack, align the jack (and foot, if equipped) with the jack and coupler as desired before welding using a 3/16 inch fillet weld. 3) Bolt the jack A-plate to the coupler using three 3/8-16 grade 5 bolts with washers, torque to 15-20 ft. lbs. 4) Weld the recommended support plate to the bottom of the trailer frame using a 3/16 inch fillet weld. 5) If your jack is a plain mount type, it may be mounted directly to a coupler with a 3/16 inch fillet weld. 6) Rack jacks with a similar A-plate incorporated into their design may be attached according to these instructions. It is recommended to attach a bottom support plate to the bottom of the tongue.
1) All welding must be performed by an AWS certified welder. 2) Place the jack at the desired location. 3) Weld 1 inch in 2 locations on both sides of the jack using a 3/16 inch fillet weld. The same welding instructions apply to other weld-on mounts.
1) All welding must be performed by an AWS certified welder. 2) The non-beveled side of the pivot tube is welded to the tongue unless otherwise specified on hardware. 3) Place the weld-on pivot tube against the tongue and weld all around with a 3/16 inch fillet weld. Align one set of pivot mount holes vertically. 4) Mate the jack to the pivot tube and secure with the supplied pin.
1) Insert the long spacer into the wheel. 2) Set the wheel into the caster body and place the bolt through the caster body and wheel. 3) Secure with the nut provided. For a heavy duty caster, use 4 3/8 inch bolts, washers, and locknuts as shown in the manual. Note: Jack capacity is limited to the lesser of the jack or caster capacity.
For side-wind models: 1) Insert the long spacer into the roller followed by the thin spacer and the bolt. 2) Secure to the crank stem with the nut provided. For top-wind models: 1) Place the washer over the screw stem and then place the handle over the screw stem. 2) Secure the handle to the screw stem with the bolt and nut provided.
The manual does not indicate that drilling is required for bolt-on installations. The mounting holes are pre-drilled on both the jack and the tongue. However, you must verify that the gap between the mounting bolts and the tongue does not exceed 1/16 inch, and that you are using the correct mounting hole pattern for your tongue size.
No. The manual explicitly states: 'Do not attempt to weld "Bolt-On" brackets or straps to the tongue. Special brackets are available for "Weld-On" applications.' If you need a weld-on installation, you must use the special weld-on brackets designed for that purpose.
For bolt-on rack jacks and bolt-on mounting bracket jacks, torque the locknuts to 25 ft. lbs. (foot-pounds).
For A-plate jacks, use three 3/8-16 grade 5 bolts with washers and torque to 15-20 ft. lbs. (foot-pounds).
All weld-on installations require a 3/16 inch fillet weld. This applies to direct-mount, A-plate, and weld-on pivot tube installations. All welding must be performed by an AWS certified welder.
The gap between the mounting bolts and the tongue must not exceed 1/16 inch (1.5 mm). This applies to bolt-on mounting bracket installations. The lower bolts should be less than 1/16 inch from the bottom of the tongue.
Fully retract and rotate the jack before towing. If using an optional drop foot or caster, always remove the drop foot or caster before towing to maximize ground clearance.
The jack capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. Never exceed the maximum rated capacity. Refer to the stamped markings or decals on the product to obtain the rated capacity. If uncertain, contact Cequent Performance Products at 1-800-632-3290 or www.cequentgroup.com.
No. These jacks are designed for vertical loading only. The manual states: 'These jacks are designed for vertical loading. Excessive side forces may cause jack failure and must be avoided.'
Never position any part of your body under any portion of the jack or the load being supported. Block wheels to secure the load, vehicle, and trailer from rolling when operating the jack or coupling the trailer. Do not allow children to play on or around the jack or the load being supported. Before manually moving the trailer, crank the jack to its lowest position.
Make certain the supplied pin is fully inserted through both sides of the inner tube and the drop tube before using the jack. If using an optional drop foot or drop leg, always remove it before towing to maximize ground clearance. Never attempt to adjust the drop foot or drop leg when there is any load on the jack.
Make certain the pivot pin is fully inserted through both sides of the pivot tube and the pivot mount before using the jack.
Lock the plunger pin into a hole in the mounting bracket before raising or lowering the tongue.
No. The manual explicitly states: 'If this product is a rack jack, do not raise the gear housing above inner tube.'
After installation is complete, check for interference again in all positions, including handle swing and swivel positions if applicable. Specifically verify clearance of the handle, trailer light cables, and coupler.
The following procedures should be performed at least annually: For side-wind models, apply a small amount of automotive grease to the internal gearing by removing the jack cover or using a needle nose applicator or standard grease gun on the lubrication point found on the side of the jack near the crank. Rotate the jack handle to distribute the grease evenly. Apply a lightweight oil to the handle unit at both sides of the tube for side-wind models. If equipped, lubricate the axle bolt and nut assembly of the caster wheel with the same lightweight oil. For top-wind models, apply a lightweight oil to the screw stem. If used in a marine environment, flush the jack assembly and bushings with fresh water and apply fresh lubricant.
Use automotive grease for the internal gearing and bushings of side-wind models. Use lightweight oil for the handle unit (both sides of the tube) on side-wind models, the axle bolt and nut assembly of the caster wheel, and the screw stem on top-wind models. If the jack is used in a marine environment, flush with fresh water and apply fresh lubricant.
Flush the jack assembly and bushings with fresh water and apply fresh lubricant.
Always replace bent, broken, or worn parts before using the product.
No. These jacks are not designed for mounting to round tongues. You must have a flat or rectangular tongue.
Bolt-on rack, bolt-on mounting bracket, snap ring, bolt-thru, A-plate (for A-plate couplers), direct-mount, and weld-on pivot tube. Choose based on your trailer type and coupler configuration.
Only if you choose a weld-on mounting style (A-plate, direct-mount, or pivot tube). Bolt-on installations do not require welding. All welding must be performed by an AWS certified welder.
No drilling is mentioned for bolt-on installations. The mounting holes are pre-drilled. Verify the correct mounting hole pattern for your tongue size and that the gap between bolts and tongue does not exceed 1/16 inch.
Torque locknuts to 25 ft. lbs. for bolt-on rack and mounting bracket jacks. For A-plate jacks, torque to 15-20 ft. lbs.
Fully retract and rotate the jack. If equipped with an optional drop foot or caster, remove it before towing to maximize ground clearance.
The capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. Never exceed the maximum rated capacity shown on the product's stamped markings or decals. Contact Cequent at 1-800-632-3290 if uncertain.
At least annually. Apply automotive grease to internal gearing (side-wind models) and lightweight oil to handle units and screw stems. In marine environments, flush with fresh water and apply fresh lubricant.
George
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May 22, 2023
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