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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: | 150037 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 9.5 LBS |
| CAPACITY: | 2,000 LBS. LIFT, 3,000 LBS. STATIC |
| TRAVEL: | 10 IN. |
| RETRACTED: | 20.4 IN. |
| EXTENDED: | 35.4 IN. |
| MODEL NUMBER: | TWL 150 X |
| 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 manual covers Cequent Performance Products tongue jacks, model F3282ML, Revision D 6077. This covers multiple jack types including bolt-on rack jacks, snap ring models, bolt-thru models, A-plate jacks, direct-mount (weld-on), and pivot tube mounts.
Tongue jacks are available in five main mounting styles: (1) Bolt-on rack jacks with gear housing and mounting bracket, (2) Snap ring models that seat into a groove, (3) Bolt-thru models with bushing and locknut, (4) A-plate jacks designed for A-plate couplers, and (5) Direct-mount (weld-on) and pivot tube mounts for round or square pivot tubes. Each style has specific installation instructions.
No. The manual explicitly states: 'These jacks are not designed for mounting to round tongues.' Round tongues are not compatible with these jack models.
No. A-plate jacks are designed specifically for mounting to trailers with A-plate couplers only. 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 jack style.
Bolt-on rack jacks include supplied bolts and locknuts. The bolts are inserted into holes corresponding to the tongue width, and the locknuts secure them. The manual does not specify the exact quantity or size of bolts, only that they are supplied and must be torqued to 25 ft. lbs.
A-plate jacks require three 3/8-16 grade 5 bolts with washers to bolt the jack A-plate to the coupler. These are torqued to 15-20 ft. lbs. The manual does not specify whether these bolts are supplied or must be purchased separately.
To attach a caster wheel, you need: one long spacer (inserted into the wheel), one bolt, and one nut. The bolt passes through the caster body and wheel, and is secured with the provided nut. For a heavy-duty caster, use four 3/8 inch bolts, washers, and locknuts as shown in the diagram.
To attach a side-wind handle assembly, you need: one long spacer (inserted into the roller), one thin spacer, one bolt, and one nut. These are secured to the crank stem with the provided nut. For a top-wind handle, you need a washer, bolt, and nut to secure the handle to the screw stem.
The manual does not specify standard tools required (such as wrenches, sockets, or screwdrivers). For welded installations, an AWS-certified welder is required. For bolt-on installations, you will need tools to tighten bolts and locknuts to the specified torque values, but the manual does not list specific tools.
Before mounting the jack, confirm that 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. Check for interference again after installation is complete. Specifically verify clearance of the handle, trailer light cables, and coupler.
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 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.
1) Place the gear housing on the tongue and insert supplied bolts into 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. After installation, check for 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 of the tongue. 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. 2) Place the snap ring in the groove and seat it 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 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, torqued 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.
Drilling is not required for bolt-on, snap ring, or bolt-thru installations, as these use existing holes in the tongue and mounting hardware. For A-plate and pivot tube installations, the manual does not mention drilling. However, the manual does not explicitly state whether the tongue has pre-drilled holes or whether drilling is necessary for any installation type.
Yes, for welded installations (A-plate, direct-mount, and pivot tube mounts), permanent welding is required. These modifications are permanent and must be performed by an AWS-certified welder. For bolt-on installations, no permanent modifications are required. The manual explicitly warns: 'Do not attempt to weld bolt-on brackets or straps to the tongue. Special brackets are available for weld-on applications.'
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 welded installation, you must use special weld-on brackets, not bolt-on brackets.
Locknuts on bolt-on rack jacks must be torqued to 25 ft. lbs.
Locknuts on bolt-on mounting brackets must be torqued to 25 ft. lbs.
The three 3/8-16 grade 5 bolts with washers that bolt the jack A-plate to the coupler must be torqued to 15-20 ft. lbs.
A 3/16 inch fillet weld is required for A-plate jack installation. This applies to welding the A-plate to the jack (if separate), welding the support plate to the bottom of the trailer frame, and welding a plain mount type jack directly to a coupler.
A 3/16 inch fillet weld is required for direct-mount installation. Weld 1 inch in 2 locations on both sides of the jack.
A 3/16 inch fillet weld is required for pivot tube mount installation. Weld all around the pivot tube where it connects to the tongue.
The manual does not mention any electrical connections, wiring, fuses, or battery disconnection for tongue jack installation. These are mechanical jacks operated by hand crank (side-wind or top-wind models) and do not appear to have electrical components.
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. 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. Before manually moving the trailer, crank the jack to the lowest position.
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. The manual does not provide specific capacity ratings for individual models.
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 this product is a swivel jack, lock the plunger pin into a hole in the mounting bracket before raising or lowering the tongue.
If this 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 this product is a rack jack, do not raise the gear housing above the inner tube.
After installation is complete, check for interference again. Specifically verify clearance of the handle, trailer light cables, and coupler. Confirm that there is no interference from the tow vehicle, tongue, ground, and any other mounted accessories while stationary or in motion, including all handle swing and swivel positions if applicable.
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, the axle bolt and nut assembly of the caster wheel must also be lubricated with the same lightweight oil. For top-wind models, apply a lightweight oil to the screw stem. If this product is used in a marine environment, flush the jack assembly and bushings with fresh water and apply fresh lubricant.
Maintenance procedures should be performed at least annually. If the product is used in a marine environment, more frequent maintenance may be necessary.
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, for the axle bolt and nut assembly of the caster wheel, and for the screw stem on top-wind models. The manual does not specify particular brand names or viscosity grades.
If the product is used in a marine environment, flush the jack assembly and bushings with fresh water and apply fresh lubricant. This should be done in addition to the standard annual maintenance procedures.
Replacement parts are available through Cequent Performance Products' Customer Service Department at 1-800-632-3290. When ordering, please specify the product model number. Use only Cequent Performance Products' parts or parts of equal quality for repair.
Always replace bent, broken, or worn parts before using this product.
No. These jacks are not designed for mounting to round tongues.
No. A-plate jacks are designed only for trailers with A-plate couplers.
No. Bolt-on, snap ring, and bolt-thru models do not require welding. A-plate, direct-mount, and pivot tube models require welding by an AWS-certified welder.
Locknuts must be torqued to 25 ft. lbs. for both bolt-on rack jacks and bolt-on mounting brackets.
Fully retract and rotate the jack before towing. If using an optional drop foot or caster, remove it before towing to maximize ground clearance.
| 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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May 22, 2023
