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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: | 150000 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 7.2 LBS |
| CAPACITY: | 2,000 LBS. LIFT, 3,000 LBS. STATIC |
| TRAVEL: | 10 IN. |
| RETRACTED: | 15 IN. |
| EXTENDED: | 25 IN. |
| MODEL NUMBER: | TWS 150 |
| 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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The jack capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. The exact maximum rated capacity is stamped or shown on decals on the product itself. If you cannot find this marking or are uncertain, contact Cequent Performance Products at 1-800-632-3290 or www.cequentgroup.com and provide your product model number.
No. These jacks are not designed for mounting to round tongues. They are designed for flat or rectangular tongues. If you have a round tongue, contact Cequent Performance Products at 1-800-632-3290 to discuss alternative solutions.
The manual covers six mounting styles: bolt-on rack jack, bolt-on mounting bracket, snap ring/bolt-thru, A-plate (bolt-on or weld-on), direct-mount (weld-on), and weld-on pivot tube (round or square). Each style has specific installation instructions. Choose the style that matches your trailer coupler type and tongue configuration.
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. Verify clearance of the handle, trailer light cables, and coupler.
For bolt-on rack jacks and bolt-on mounting brackets, torque all locknuts to 25 ft. lbs. For A-plate jacks, use three 3/8-16 grade 5 bolts with washers and torque to 15-20 ft. lbs.
The gap between the mounting bolts and the tongue must not exceed 1/16 inch (1.5 mm). When installing bolt-on jacks, the upper bolts should rest on the top of the tongue, and the lower bolts should be less than 1/16 inch from the bottom of the tongue.
No drilling is required for bolt-on jacks. The mounting holes are pre-drilled in the tongue and mounting bracket. You simply align the holes, insert the supplied bolts, and secure with locknuts. However, do not attempt to weld bolt-on brackets or straps to the tongue; special brackets are available for weld-on applications.
Welding is required only for weld-on mounting styles: direct-mount, A-plate (weld-on), and weld-on pivot tube. All welding must be performed by an AWS certified welder. Bolt-on and snap ring/bolt-thru styles do not require welding. If you have a bolt-on jack, do not attempt to weld the brackets to the tongue.
For direct-mount installation, weld 1 inch in 2 locations on both sides of the jack using a 3/16 inch fillet weld. All welding must be performed by an AWS certified welder.
For A-plate jacks, use a 3/16 inch fillet weld to attach the A-plate to the coupler. If the A-plate is separate from the jack, align the jack and foot (if equipped) with the jack and coupler before welding. It is recommended to weld a support plate to the bottom of the trailer frame using a 3/16 inch fillet weld. All welding must be performed by an AWS certified welder.
For weld-on pivot tube mounting (round or square tubes), place the non-beveled side of the pivot tube against the tongue and weld all around with a 3/16 inch fillet weld. Align one set of pivot mount holes vertically. All welding must be performed by an AWS certified welder.
To attach a snap ring model jack, place the jack bracket over the mount and place the snap ring in the groove. Seat the snap ring fully into the groove. Before installing the snap ring, inspect the snap ring groove and remove any debris.
To attach a bolt-thru model jack, place the jack bracket into the recessed opening on the mount. Place the small end of the bushing into the jack bracket and onto the bolt. Tighten the locknut until there is little movement in the bushing. 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.
To attach a wheel assembly: 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 heavy duty casters, use 4 3/8 inch bolts, washers, and locknuts. Note that jack capacity is limited to the lesser of the jack or caster capacity.
To attach a side-wind handle assembly: 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. To attach a top-wind handle assembly: 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.
Fully retract and rotate the jack before towing. Before manually moving the trailer, crank the jack to the lowest position. If using an optional drop foot or caster, always remove it before towing to maximize ground clearance.
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 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. These jacks are designed for vertical loading only; excessive side forces may cause jack failure and must be avoided.
When using a 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. If using an optional drop foot or caster, 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.
If your jack has a pivot tube mount, make certain the pivot pin is fully inserted through both sides of the pivot tube and the pivot mount before using the jack.
If your jack is a swivel jack, lock the plunger pin into a hole in the mounting bracket before raising or lowering the tongue.
If your jack is a rack jack, do not raise the gear housing above the inner tube. Doing so may cause damage or failure.
The following procedures should be performed at least annually. For side-wind models, apply a small amount of automotive grease to the internal gearing and apply a lightweight oil to the handle unit at both sides of the tube. For top-wind models, apply a lightweight oil to the screw stem. If equipped, lubricate the axle bolt and nut assembly of the caster wheel with lightweight oil. If used in a marine environment, flush the jack assembly and bushings with fresh water and apply fresh lubricant.
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.
For top-wind models, apply a lightweight oil to the screw stem. This should be done at least annually.
If the jack is used in a marine environment, flush the jack assembly and bushings with fresh water, and apply fresh lubricant. This should be done at least annually, or more frequently depending on exposure.
After installation is complete, check for interference again in all positions, including handle swing and swivel positions if applicable. Verify clearance of the handle, trailer light cables, and coupler. Ensure all bolts are torqued to specification and all pins are fully inserted where applicable.
The manual does not provide a comprehensive parts list for all jack types. Included components vary by mounting style and may include bolts, locknuts, washers, snap rings, bushings, pins, spacers, and handle or caster assemblies. Refer to your specific product documentation or contact Cequent Performance Products at 1-800-632-3290 for a complete parts list for your model.
No. The purchaser/owner must not alter or modify the product. Any modifications not performed according to the installation instructions and in a workmanlike manner will void the warranty and may cause product failure or safety hazards.
No. This product is not intended to be used as a transport device for the implement it is attached to. Minimize movement of the implement while the jack is under load.
No. These jacks are not designed for mounting to round tongues. They require flat or rectangular tongues.
The gap must not exceed 1/16 inch (1.5 mm).
Torque all locknuts to 25 ft. lbs. for bolt-on rack jacks and bolt-on mounting brackets. For A-plate jacks, torque to 15-20 ft. lbs.
No. Mounting holes are pre-drilled. Simply align the holes, insert supplied bolts, and secure with locknuts.
Welding is required only for weld-on styles (direct-mount, A-plate weld-on, pivot tube). Bolt-on and snap ring styles do not require welding. All welding must be performed by an AWS certified welder.
Fully retract and rotate the jack. Crank to the lowest position before manually moving the trailer. Remove any optional drop foot or caster before towing.
Perform maintenance at least annually. Side-wind models require grease on internal gearing and oil on handle. Top-wind models require oil on screw stem. Marine environments require fresh water flush and fresh lubricant.
No. Do not attempt to weld bolt-on brackets or straps to the tongue. Special brackets are available for weld-on applications.
| Part Number | Model Number | Description | Lift Capacity (lbs.) | Handle Style | Travel (in.) | A Retracted (in.) | B Extended (in.) | C Clearance (in.) |
|---|---|---|---|---|---|---|---|---|
| 150037 | TWL 150 X | No Foot, No Mount | 2,000 | Topwind | 10.00 | 20.40 | 35.40 | - |
| 150010 | SWL 150 | No Foot, No Mount | 2,000 | Sidewind | 10.00 | 17.10 | 27.10 | - |
| 150152 | SWL 150 | No Foot, No Mount | 2,000 | Sidewind | 15.00 | 26.60 | 41.60 | - |
| 1500520317 | SWL 150 X | No Foot, No Mount | 2,000 | Sidewind | 15.00 | 23.60 | 38.60 | - |
| 150000 | TWL 150 | No Foot, No Mount | 2,000 | Topwind | 10.00 | 15.00 | 25.00 | - |
| 1701480317 | TWL 170 | No Foot, No Mount | 5,000 | Topwind | 15.00 | 21.00 | 36.00 | - |
| 170205 | SWL 170 | No Foot, No Mount | 5,000 | Sidewind | 15.00 | 19.20 | 34.20 | - |
| Replacement Parts | ||||||||
| 500236 | End Cap, 2 in. Diameter | |||||||
| 500256 | Sidewind Crank Assembly for 150 Series | |||||||
| 500105 | Sidewind Crank Assembly for 170 Series | |||||||
| 500180 | Topwind Crank Assembly | |||||||
| 500251 | Bearing Kit for 150 Series | |||||||
| 500223 | Thrust Bearing for 170 Series | |||||||
| 500106 | Sidewind Gear Kit for 150 Series and 170 Series | |||||||
| 500205 | Sidewind Crank Gear Box Cover | |||||||
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