Bulldog Round Trailer Jack, A-Frame, 5,000 lbs. Lift Capacity, Top Wind, Bolt-On, 15 in. Travel BD1750290301BulldogOut of Stock
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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: | 155032 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 9.7 LBS |
| CAPACITY: | 5,000 LBS. W/ CASTER |
| TRAVEL: | 15 IN. |
| RETRACTED: | 10.3 IN. |
| EXTENDED: | 25.3 IN. |
| CLEARANCE: | 12 IN. |
| MODEL NUMBER: | TWL 155 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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A tongue jack is a device mounted to a trailer tongue that raises and lowers the tongue for coupling and uncoupling from a tow vehicle. It supports the weight of the tongue and implements attached to the trailer. The manual covers multiple jack types including bolt-on rack jacks, snap ring models, bolt-thru models, A-plate jacks, and pivot tube jacks, with both side-wind (crank handle on the side) and top-wind (crank handle on top) handle configurations.
The manual covers six mounting styles: (1) Bolt-on rack jack—bolted directly to the tongue; (2) Bolt-on mounting bracket—uses four bolts through the bracket and mounting straps; (3) Snap ring—jack bracket placed over mount with snap ring seated in groove; (4) Bolt-thru—jack bracket in recessed opening with bushing and locknut; (5) A-plate—designed for trailers with A-plate couplers, bolted or welded; (6) Direct-mount (weld-on)—welded directly to tongue; (7) Pivot tube (weld-on)—for round or square pivot tubes. Consult the manual section for your specific jack type.
No. The manual explicitly states: "These jacks are not designed for mounting to round tongues." This applies to all bolt-on and standard mounting types. However, pivot tube jacks are available for round or square pivot tubes as a separate mounting option.
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 does not have an A-plate coupler, you will need a different jack mounting style.
The manual does not specify tools required 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. For A-plate installations, a wrench capable of applying 15–20 ft. lbs. of torque is needed.
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.
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 jack bracket over the mount. 2. Place the snap ring in the groove. 3. 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. Place the gear housing on the tongue and insert the 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.
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.
The manual does not state whether drilling is required. It assumes mounting holes already exist on the tongue corresponding to the tongue width. If holes do not exist, drilling may be necessary, but the manual does not provide guidance on hole size or drilling procedures. Contact the manufacturer at 1-800-632-3290 or www.cequentgroup.com 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 welded installation, you must use weld-on brackets designed for that purpose.
All welding must be performed by an AWS (American Welding Society) 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. For A-plate installations, use a 3/16 inch fillet weld. For pivot tube installations, weld all around the pivot tube with a 3/16 inch fillet weld. Support plates should also be welded with a 3/16 inch fillet weld.
For bolt-on rack jacks and bolt-on mounting bracket installations, torque the locknuts to 25 ft. lbs. For A-plate installations, use three 3/8-16 grade 5 bolts with washers and torque to 15–20 ft. lbs.
Use three 3/8-16 grade 5 bolts with washers. Torque to 15–20 ft. lbs. These bolts attach the jack A-plate to the coupler.
The 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.
Never position any part of your body under any portion of the jack or the load being supported. Fully retract and rotate the jack before towing. Secure the load, vehicle, and trailer from rolling by blocking the wheels when operating the jack or coupling the trailer. Before manually moving the trailer, crank the jack to its lowest position. 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.
Yes. If using an optional drop foot or caster, always remove it before towing to maximize ground clearance. The manual also states that the jack must be fully retracted and rotated before towing.
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 before raising or lowering the tongue.
No. If the product is a rack jack, do not raise the gear housing above the inner tube. This is a safety restriction to prevent damage and failure.
Always replace bent, broken, or worn parts before using the product. Do not attempt to use a jack with damaged components.
The following procedures should be performed at least annually. For side-wind models, the internal gearing and bushings must be kept lubricated. For top-wind models, apply lightweight oil to the screw stem. If the product is 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.
A lightweight oil must be applied 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.
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.
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.
Jack capacity is limited to the lesser of the jack or caster capacity. Use 4 3/8 inch bolts, washers, and locknuts as shown in the manual.
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.
No. Tongue jacks are not designed for mounting to round tongues. Pivot tube jacks are available for round or square pivot tubes as an alternative.
A-plate jacks are designed only for trailers with A-plate couplers. Verify your trailer has an A-plate coupler before purchasing.
Torque locknuts to 25 ft. lbs. for bolt-on rack jacks and bolt-on mounting bracket installations. For A-plate installations, torque to 15–20 ft. lbs.
Fully retract and rotate the jack before towing. Remove any optional drop foot or caster. Ensure the jack is in its lowest position.
Perform maintenance at least annually. Lubricate internal gearing and bushings with automotive grease for side-wind models, and apply lightweight oil to the screw stem for top-wind models.
Before installing the snap ring, inspect the snap ring groove and remove any debris. Debris in the groove prevents the snap ring from seating fully. After cleaning, seat the snap ring fully into the groove. If the snap ring still does not seat, the groove may be damaged and the part should be replaced.
Tighten the locknut until there is little movement in the bushing. If movement persists after tightening, the bushing may be worn and should be replaced. Excessive bushing movement can cause the jack bracket to shift during operation.
Always replace bent, broken, or worn parts before using the product. Do not attempt to repair a damaged jack. Contact Cequent Performance Products at 1-800-632-3290 to order replacement parts. Specify the product model number. Use only Cequent Performance Products parts or parts of equal quality for repair.
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| Part Number | Model Number | Description | Lift Capacity (lbs.) | Handle Style | Travel (in.) | A Retracted (in.) | B Extended (in.) | C Clearance (in.) |
|---|---|---|---|---|---|---|---|---|
| A-Frame | ||||||||
| 155022 | TWL 155 | Weld-On/Bolt-On Bracket | 2,000 | Topwind | 15.00 | 8.80 | 23.80 | 12.20 |
| 155028 | TWL 155 | Weld-On/Bolt-On Bracket, Clear Zinc Finish | 2,000 | Topwind | 15.00 | 8.40 | 23.40 | 13.00 |
| 155033 | TWL 155X | Weld-On/Bolt-On Bracket | 2,000 | Topwind | 15.00 | 5.40 | 20.40 | 16.00 |
| 155100 | TWL 155 D | 7.5 in. Bracket to Ground Retracted, with Welded Disc Foot | 2,000 | Topwind | 15.00 | 7.50 | 22.50 | 17.00 |
| 151109 | SWS 151 DSX | Weld-On/Bolt-On Bracket | 2,000 | Sidewind | 10.00 | 11.00 | 21.80 | 6.45 |
| 155157 | SWL 155X (RV) | External Gear Box, Handle to Front, Weld-On/Bolt-On Bracket | 2,000 | Sidewind | 13.00 | 8.60 | 21.50 | 13.00 |
| 155100317 | SWL 155 X | External Gear Box, Weld-On/Bolt-On Bracket | 3,000 | Sidewind | 13.00 | 7.00 | 20.00 | 14.50 |
| 1551001344 | SWL 155 X | External Gear Box, Weld-On/Bolt-On Bracket, Clear Zinc Finish | 3,000 | Sidewind | 13.00 | 7.00 | 20.00 | 14.50 |
| 155032 | TWL 155 HD | Weld-On/Bolt-On Bracket | 5,000 | Topwind | 15.00 | 10.30 | 25.30 | 7.00 |
| 175000 | TWL 175 | Weld-On/Bolt-On Bracket | 5,000 | Topwind | 15.00 | 11.00 | 27.10 | 7.00 |
| 175013 | TWL 175 X | Weld-On/Bolt-On Bracket | 5,000 | Topwind | 7.50 | 10.82 | 22.50 | 17.00 |
| 1750209317 | TWL 175 | Weld-On/Bolt-On Bracket | 5,000 | Topwind | 15.00 | 10.82 | 25.82 | 18.70 |
| 1700100317 | SWL 175 | Handle to Front, Weld-On/Bolt-On Bracket | 5,000 | Sidewind | 15.00 | 8.60 | 23.60 | 12.75 |
| Retaining Ring Swivel | ||||||||
| 151444 | TWL 154 | Bolt-On, Retaining Ring Swivel, 1/2 in. Diameter Plunger Pin, 6" Wheel | 1,500 | Topwind | 10.00 | 11.00 | 24.00 | 4.00 |
| 151443 | TWS 159 SX | Bolt-On, Retaining Ring Swivel, 1/2 in. Diameter Plunger Pin, No Base | 2,000 | Topwind | 15.00 | 11.00 | 21.00 | 4.00 |
| 154107 | TWS 154 DCX | Centerbolt, Retaining Ring Swivel, 1/2 in. Diameter Plunger Pin and Footplate | 1,500 | Topwind | 10.00 | 11.00 | 21.00 | 4.00 |
Sam
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May 22, 2023