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Bulldog
Always the correct part
We know our products
Quality Products
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Always the correct part
We know our products
Quality Products
Free Shipping!
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: | 154107 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 10.4 LBS |
| CAPACITY: | 2,000 LBS. LIFT, 3,000 LBS. STATIC |
| TRAVEL: | 10 IN. |
| RETRACTED: | 11 IN. |
| EXTENDED: | 21 IN. |
| CLEARANCE: | 4 IN. |
| MODEL NUMBER: | TWS 154 DCX |
| 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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A tongue jack is a lifting device mounted to a trailer tongue that raises and lowers the front of the trailer for coupling and uncoupling from the tow vehicle. These jacks are available in multiple styles including bolt-on rack jacks, snap ring models, bolt-thru models, and weld-on direct-mount versions. They feature either side-wind or top-wind handle configurations and can be equipped with optional drop feet, drop legs, or caster wheels for ground support.
The jack accommodates different tongue widths through selectable mounting hole patterns. When installing a bolt-on jack, you must ensure the correct mounting hole pattern for your specific tongue size. The gap between the mounting bolts and the tongue must not exceed 1/16 inch. Consult the manual or contact Cequent Performance Products at 1-800-521-0510 to confirm the correct hole pattern for your trailer tongue width.
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 1-800-521-0510 to discuss alternative solutions.
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 such as bolt-on, snap ring, or direct-mount.
Bolt-on rack jacks include supplied bolts and locknuts for mounting. The exact quantity and specifications depend on your tongue width and mounting configuration. The manual specifies that bolts are inserted into holes corresponding to the tongue width, and the assembly is secured with locknuts torqued to 25 ft. lbs.
For bolt-on installation, you will need a wrench or socket set to tighten the locknuts to 25 ft. lbs. torque. A torque wrench is recommended to ensure proper tightness. For weld-on installations, an AWS-certified welder is required, along with welding equipment and a 3/16-inch fillet weld capability.
For side-wind handle assembly, you will need a wrench or socket to secure the long spacer, thin spacer, and bolt to the crank stem with the provided nut. For top-wind handle assembly, you need a wrench to secure the washer, handle, bolt, and nut to the screw stem. No specialized tools beyond standard wrenches are required.
To attach a caster wheel, you will need the long spacer (included), the wheel, a bolt, and the provided nut. For a heavy-duty caster, you will need four 3/8-inch bolts, washers, and locknuts as shown in the manual. A wrench or socket is required to tighten the fasteners.
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. After installation is complete, check for interference again. Verify clearance of the handle, trailer light cables, and coupler.
The manual does not mention battery disconnection as a requirement for tongue jack installation. Battery disconnection is not necessary for this product.
1) Place the gear housing on the tongue and insert the 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, verify that the gap between mounting bolts and tongue does not exceed 1/16 inch, and check 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. Ensure the gap between mounting bolts and tongue does not exceed 1/16 inch.
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.
If the A-plate is separate from the jack: 1) All welding must be performed by an AWS-certified welder. 2) 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, 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. If your jack is a plain mount type, it may be mounted directly to a coupler with a 3/16-inch fillet weld. 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.
No drilling is required for bolt-on installation. The mounting holes are pre-drilled in both the jack bracket and the mounting straps. You simply align the existing holes and insert the supplied bolts. However, you must ensure the correct mounting hole pattern for your tongue size is used.
No. 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, contact Cequent Performance Products at 1-800-521-0510 to obtain the correct weld-on brackets for your application.
Yes. Weld-on installations are permanent modifications to the trailer tongue. All welding must be performed by an AWS-certified welder using a 3/16-inch fillet weld. Once welded, the jack cannot be removed without cutting the welds, which will damage the tongue.
All mounting bolts on bolt-on jacks must be torqued to 25 ft. lbs. This applies to both bolt-on rack jacks and bolt-on mounting bracket installations. Use a torque wrench to ensure proper tightness.
The three 3/8-16 grade 5 bolts with washers that attach the jack A-plate to the coupler must be torqued to 15-20 ft. lbs.
All weld-on installations require a 3/16-inch fillet weld. This applies to direct-mount installations (1 inch in 2 locations on both sides), A-plate mounting, and weld-on pivot tube mounting. 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 all bolt-on installations. The lower bolts should be less than 1/16 inch from the bottom of the tongue, and proper alignment ensures this specification is met.
Before towing, you must fully retract and rotate the jack. If the jack has an optional drop foot or drop leg, always remove it before towing to maximize ground clearance. If the jack has a swivel feature, lock the plunger pin into a hole in the mounting bracket before raising or lowering the tongue.
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.
No. These jacks are designed for vertical loading only. Excessive side forces may cause jack failure and must be avoided. Always apply load vertically to the jack.
Before manually moving the trailer, crank the jack to the lowest position. This ensures the jack is fully retracted and will not interfere with ground clearance or towing.
No. If the product has a drop foot or drop leg, never attempt to adjust it when there is any load on the jack. Always lower the jack completely before making any adjustments.
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. If using an optional drop foot or caster, always remove it before towing to maximize ground clearance.
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 operating 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. This prevents unintended rotation during operation.
No. If the product is a rack jack, do not raise the gear housing above the inner tube. This could cause damage to the jack or create a safety hazard.
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. Do not use the jack as a transport device for the implement it is attached to; minimize movement of the implement while the jack is under load.
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 the correct specification (25 ft. lbs. for bolt-on installations, 15-20 ft. lbs. for A-plate bolts). Test the jack operation to confirm it raises and lowers smoothly.
The following procedures should be performed at least annually: For side-wind models, apply automotive grease to the internal gearing and bushings. Apply lightweight oil to the handle unit at both sides of the tube. Lubricate the caster wheel axle bolt and nut assembly with the same lightweight oil. For top-wind models, apply lightweight oil to the screw stem. If the jack 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.
If the jack is used in a marine environment, flush the jack assembly and bushings with fresh water, and apply fresh lubricant at least annually. This prevents corrosion and salt buildup.
Always replace bent, broken, or worn parts before using the jack. Inspect the jack regularly for damage and replace any compromised components to ensure safe operation.
Replacement parts are available through Cequent Performance Products' Customer Service Department at 1-800-521-0510. Use only Cequent Performance Products parts or parts of equal quality for repair. Please specify the product model number when ordering.
Tongue jacks are available in multiple mounting styles (bolt-on, snap ring, bolt-thru, A-plate, direct-mount, and pivot tube). Confirm your tongue width and coupler type. A-plate jacks fit only A-plate couplers. Jacks are not designed for round tongues. Contact Cequent Performance Products at 1-800-521-0510 with your trailer specifications.
For bolt-on installation, you need a wrench or socket set and a torque wrench to tighten bolts to 25 ft. lbs. For weld-on installation, an AWS-certified welder is required with welding equipment capable of 3/16-inch fillet welds.
No drilling is required for bolt-on installations; mounting holes are pre-drilled. Weld-on installations require AWS-certified welding but no drilling.
Bolt-on mounting bolts: 25 ft. lbs. A-plate bolts: 15-20 ft. lbs. Weld-on installations require 3/16-inch fillet welds by an AWS-certified welder. Use a torque wrench for bolt installations.
Fully retract and rotate the jack. Remove any optional drop foot or caster wheel. Lock the plunger pin if it is a swivel jack. Check that the jack is in the lowest position before moving the trailer.
Capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. Check the stamped markings or decals on your specific jack. Never exceed the rated capacity. Contact Cequent Performance Products at 1-800-521-0510 if uncertain.
Perform maintenance at least annually. Side-wind models: apply automotive grease to internal gearing and lightweight oil to handle. Top-wind models: apply lightweight oil to screw stem. In marine environments, flush with fresh water and apply fresh lubricant.
No. Jacks are designed for vertical loading only. Excessive side forces cause failure and must be avoided. Always apply load vertically.
Before installing the snap ring, inspect the snap ring groove and remove any debris. Debris in the groove will prevent the snap ring from seating fully. Once the groove is clean, seat the snap ring fully into the groove. If the snap ring still does not seat properly, the groove may be damaged and the jack should not be used.
Tighten the locknut until there is little movement in the bushing. If the bushing continues to move excessively after tightening, the locknut may not be tight enough or the bushing may be worn. Tighten the locknut further, or if the bushing is damaged, replace it with a new bushing from Cequent Performance Products.
Check that the jack is properly lubricated. For side-wind models, apply automotive grease to the internal gearing and lightweight oil to the handle. For top-wind models, apply lightweight oil to the screw stem. Rotate the jack handle to distribute lubricant evenly. If the jack still does not operate smoothly, it may have internal damage and should not be used. Contact Cequent Performance Products at 1-800-521-0510.
Excessive leaking indicates a seal failure or damage to the jack housing. Do not use the jack if it is leaking significantly. Contact Cequent Performance Products at 1-800-521-0510 to report the issue and obtain a replacement or repair. Use only Cequent Performance Products parts or parts of equal quality for any repairs.
Check that all bolts are torqued to the correct specification: 25 ft. lbs. for bolt-on mounting bolts, or 15-20 ft. lbs. for A-plate bolts. Use a torque wrench to retighten any loose bolts to the proper specification. If bolts continue to loosen, the mounting holes may be stripped or the bolts may be damaged. Replace damaged bolts and consider using thread-locking compound on the bolts to prevent future loosening.
After installation, verify clearance of the handle, trailer light cables, and coupler. If interference is detected, the jack may have been installed in an incorrect position. Loosen the mounting bolts and reposition the jack to eliminate interference. Retighten the bolts to the correct torque specification. If repositioning is not possible, contact Cequent Performance Products at 1-800-521-0510 to discuss alternative mounting options.
The jack handle may be difficult to turn due to lack of lubrication or internal damage. For side-wind models, apply lightweight oil to the handle unit at both sides of the tube. For top-wind models, apply lightweight oil to the screw stem. Rotate the handle to distribute the lubricant. If the handle remains stuck or difficult to turn, the jack may have internal damage and should not be used. Contact Cequent Performance Products at 1-800-521-0510.
| 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 |
Ann
The staff was able to quickly assist me with locating the correct product I needed. Shipping was really fast. Item arrived in 2 days. Will be using TowUniverse again!!
May 22, 2023
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