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Bulldog
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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: | 151464 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 13.3 LBS |
| CAPACITY: | 2,000 LBS. |
| TRAVEL: | 15 IN. |
| RETRACTED: | 16 IN. |
| EXTENDED: | 31 IN. |
| CLEARANCE: | 4 IN. |
| MODEL NUMBER: | TWL 151 DS |
| HANDLE STYLE: | TOPWIND |
| MATERIAL: | STEEL |
| FOOT LENGTH: | 7.5 IN. |
| FOOT WIDTH: | 3.9 IN. |
| FOOT PLATE SIZE: | 7.5 IN. X 3.9 IN. |
| WHEEL: | NO |
| ATTACHED WHEELS: | NO |
| CYLINDER DIAMETER: | 2.25 IN. |
| SPEEDY LIFT: | NO |
| COLOR: | SILVER |
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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The model number is F3282ML, Revision C (12642). This manual covers multiple tongue jack configurations including bolt-on rack jacks, snap ring, bolt-thru, A-plate, direct-mount, and pivot tube mounting styles, with optional drop foot, drop leg, or removable caster attachments.
Tongue jacks are available in the following mounting styles: bolt-on rack jacks, bolt-on mounting brackets, snap ring, bolt-thru, A-plate (bolt-on or weld-on), direct-mount (weld-on), and weld-on pivot tube mounts for both round and square tubes. Each style has different installation requirements.
No. The manual explicitly states: 'These jacks are not designed for mounting to round tongues.' Tongue jacks are designed for flat or A-plate tongues only.
No. A-plate jacks are designed specifically for mounting to trailers with A-plate couplers only. If your trailer has a different coupler type, you will need a different jack mounting style.
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. Proper alignment ensures secure fastening and prevents movement.
Bolt-on rack jacks include supplied bolts and locknuts for securing the gear housing and mounting bracket to the tongue. The bolts are inserted through holes corresponding to the tongue width, and the mounting bracket is placed below the tongue with the flat surface against it.
For A-plate jacks, you will need three 3/8-16 grade 5 bolts with washers to bolt the A-plate to the coupler. If welding is required, a support plate should be welded to the bottom of the trailer frame using a 3/16 inch fillet weld. All welding must be performed by an AWS-certified welder.
The manual does not specify standard tools required (such as wrenches or sockets). However, for weld-on installations, an AWS-certified welder is required. For bolt-on installations, you will need tools to tighten bolts and locknuts to the specified torque value of 25 ft. lbs.
Before mounting the jack, confirm there will be no interference from the tow vehicle, tongue, ground, and 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. Also verify clearance of the handle, trailer light cables, and coupler.
1) Place the gear housing on the tongue and insert supplied bolts in holes corresponding to the 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. 4) Check for clearance of handle, trailer light cables, and coupler.
1) Place the jack against the tongue and position the mounting straps on the opposite side of the tongue. 2) Align the holes in the mounting bracket with the holes in the mounting straps. 3) 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. 4) Secure with locknuts and torque to 25 ft. lbs. 5) 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 the snap ring, 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.
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. Use 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.
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 roller followed by the thin spacer and the bolt. 2) Secure to the crank stem with the nut provided.
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.
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.
Use 4 3/8 inch bolts, washers, and locknuts as shown in the manual. The jack capacity is limited to the lesser of the jack or caster capacity.
The manual does not state whether drilling is required. It assumes mounting holes already exist in the tongue and mounting straps. If holes do not exist, drilling may be necessary, but the manual does not provide guidance on this. Contact Cequent Performance Products at 1-800-521-0510 for clarification.
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 appropriate weld-on mounting style and AWS-certified welder.
No. The manual states: 'Purchaser/owner must not alter or modify product.' Any modifications will void the warranty and may compromise safety. If you need a different configuration, contact Cequent Performance Products at 1-800-521-0510.
Torque all mounting bracket bolts and locknuts to 25 ft. lbs. This applies to both bolt-on rack jacks and bolt-on mounting bracket installations.
Torque the three 3/8-16 grade 5 bolts with washers that secure the A-plate to the coupler to 15-20 ft. lbs.
All weld-on installations require a 3/16 inch fillet weld. This applies to direct-mount, A-plate, and pivot tube mounting styles. All welding must be performed by an AWS-certified welder.
For direct-mount installations, weld 1 inch in 2 locations on both sides of the jack using a 3/16 inch fillet weld. This creates four 1-inch weld segments total.
Never position any part of your body under any portion of the jack or the load being supported. Secure the load, vehicle, and trailer from rolling by blocking the wheels when operating the jack or coupling the trailer. Do not allow children to play on or around the jack or the load being supported. Minimize movement of the implement while the jack is under load. These jacks are designed for vertical loading only; excessive side forces may cause jack failure and must be avoided.
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 1-800-521-0510 or www.cequentgroup.com.
Before manually moving the trailer, crank the jack to the lowest position.
When using the drop foot or drop leg, make certain the supplied pin is fully inserted through both sides of the inner tube and the drop tube before using the jack. Never attempt to adjust the drop foot or drop leg when there is any load on the jack.
If the product is a swivel jack, lock the plunger pin into a hole in the mounting bracket before raising or lowering the tongue.
If the product has a pivot tube mount, make certain the pivot pin is fully inserted through both sides of the pivot tube and the pivot mount.
If the product is a rack jack, do not raise the gear housing above the inner tube.
The following procedures should be performed at least annually: 1) The internal gearing and bushings must be kept lubricated. Apply a small amount of automotive grease to the internal gearing by removing the jack cover, or if equipped, use 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. 2) A lightweight oil must be applied to the handle unit at both sides of the tube. 3) If equipped, the axle bolt and nut assembly of the caster wheel must also be lubricated with the same lightweight oil.
Apply a lightweight oil to the screw stem at least annually.
If the product is used in a marine environment, flush the jack assembly and bushings with fresh water, and apply fresh lubricant at least annually.
Always replace bent, broken, or worn parts before using the product.
Use only Cequent Performance Products parts or parts of equal quality for repair. Replacement parts are available through Cequent Performance Products Customer Service Department at 1-800-521-0510. Please specify the product model number.
No. Tongue jacks are not designed for mounting to round tongues. They are designed for flat or A-plate tongues only.
Welding is required only for weld-on mounting styles (direct-mount, A-plate, and pivot tube). Bolt-on models do not require welding. All welding must be performed by an AWS-certified welder.
Torque all bolt-on mounting bolts to 25 ft. lbs. For A-plate bolts, torque to 15-20 ft. lbs.
Fully retract and rotate the jack before towing. If using an optional drop foot or caster, remove it 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 stamped markings or decals on the product for the rated capacity.
At least annually: for side-wind models, apply automotive grease to internal gearing and lightweight oil to the handle; for top-wind models, apply lightweight oil to the screw stem. In marine environments, flush with fresh water and apply fresh lubricant.
Before installing the snap ring, inspect the snap ring groove and remove any debris. Seat the snap ring fully into the groove. If debris is present, clean the groove thoroughly before attempting to install the snap ring again.
Tighten the locknut until there is little movement in the bushing. The bolt should be installed between the trailer tongue and mount, with the jack bracket held by the bushing between the locknut and the mount.
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 grease gun on the lubrication point near the crank. Rotate the jack handle to distribute the grease evenly. Also apply lightweight oil to the handle at both sides of the tube. For top-wind models, apply lightweight oil to the screw stem. These procedures should be performed at least annually.
| Part Number | Model Number | Description | Lift Capacity (lbs.) | Pin (in.) | Handle Style | Travel (in.) | A Retracted (in.) | B Extended (in.) | C Clearance (in.) |
|---|---|---|---|---|---|---|---|---|---|
| 151401 | TWS 151 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 2,000 | 1/2 | Topwind | 10.00 | 11.00 | 21.00 | 4.00 |
| 151421 | TWL 151 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 2,000 | 1/2 | Topwind | 15.00 | 14.50 | 29.50 | 10.00 |
| 151464 | TWL 151 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 2,000 | 3/8 | Topwind | 15.00 | 16.00 | 31.00 | 4.00 |
| 151101 | SWS 151 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 2,000 | 1/2 | Sidewind | 10.00 | 11.00 | 21.00 | 6.40 |
| 151110 | SWS 151 DSX | L-Bend Swivel Bracket Assembled, Includes Footplate | 2,000 | 3/8 | Sidewind | 15.00 | 15.80 | 30.80 | 6.25 |
| 151159 | SWL 151 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 2,000 | 1/2 | Sidewind | 15.00 | 14.50 | 29.50 | 12.20 |
| 171401 | TWS 171 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 5,000 | 1/2 | Topwind | 10.00 | 11.25 | 21.25 | 4.00 |
| 171412 | TWL 171 DS | L-Bend Swivel Bracket Assembled, Includes Footplate | 5,000 | 1/2 | Topwind | 15.00 | 14.50 | 29.50 | 10.00 |
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