Our in-house experts typically reply within one business day.
Bulldog
Always the correct part
We know our products
Quality Products
Free Shipping!
Always the correct part
We know our products
Quality Products
Free Shipping!
On Sale Today
Original price was $140.00. Current price is $136.34.You save $3.66
Free Shipping
Ships free on all orders
Authorized Dealer
FREE ShippingFREE SHIPPING
Estimated delivery Tue, Aug 11 - Fri, Aug 14
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
BULLDOG trailer jacks are tough and trusted, built with uncompromising strength and materials engineered to hold up under rigorous working conditions. The BULLDOG round jacks have a smooth, comfortable, ergonomic design that sets the industry standard within the agricultural, commercial, horse and livestock trailer, and other trailer markets.
| BRAND: | BULLDOG |
| PART NUMBER: | 178203 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 16.58 LBS |
| CAPACITY: | 5,000 LBS. LIFT, 7,000 LBS. STATIC |
| TRAVEL: | 15.5 IN. |
| RETRACTED: | 15.4 IN. |
| EXTENDED: | 30.5 IN. |
| CLEARANCE: | 6.3 IN. |
| MODEL NUMBER: | SWL 178 DTSF W/P&C |
| HANDLE STYLE: | SIDEWIND |
| 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: | 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.
Experts available to answer your questions
Call 888-634-94945 Years
A tongue jack is a mechanical lifting device mounted to a trailer tongue that raises and lowers the front of the trailer for coupling, uncoupling, and ground clearance. The manual covers multiple types: bolt-on rack jacks, snap ring models, bolt-thru models, A-plate jacks, direct-mount jacks, and pivot tube jacks. Each type uses either a side-wind (hand crank on the side) or top-wind (hand crank on top) handle to raise and lower the load vertically.
No. The manual explicitly states: "These jacks are not designed for mounting to round tongues." Tongue jacks are designed for flat or rectangular tongues only.
The manual covers six mounting styles: (1) Bolt-on rack jack with mounting bracket and locknuts; (2) Snap ring model, which uses a snap ring seated in a groove; (3) Bolt-thru model with bushing and locknut; (4) A-plate mounting for trailers with A-plate couplers (bolt-on or weld-on); (5) Direct-mount (weld-on only); and (6) Weld-on pivot tube mounting for round or square pivot tubes. The correct mounting style depends on your trailer's coupler type and tongue design.
Yes. A-plate jacks are designed specifically for mounting to trailers with A-plate couplers. If your trailer has a different coupler type, you will need a different jack mounting style.
Bolt-on jacks include supplied bolts and locknuts for securing the mounting bracket to the tongue. The exact number and size of bolts depend on the jack model and tongue width. The manual specifies that bolts must be inserted in holes corresponding to the tongue width, and the gap between mounting bolts and the tongue must not exceed 1/16 inch (1.5 mm).
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.
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. Specifically verify 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. 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. The gap between mounting bolts and tongue must not exceed 1/16 inch.
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.
For A-plate jacks on trailers with A-plate couplers: 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, 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. It is recommended to attach a bottom support plate to the bottom of the tongue.
1) All welding must be performed by an AWS certified welder. 2) Place the jack at the desired location on the tongue. 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 if your tongue already has the correct mounting holes. However, if your tongue does not have pre-drilled holes matching the jack's mounting pattern, drilling will be necessary. The manual does not provide drilling instructions, so consult the jack manufacturer or a professional installer. Weld-on installations do not require drilling but do require welding by an AWS certified welder.
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 purchase a weld-on jack model designed for that purpose.
Torque all locknuts to 25 ft. lbs. (3.5 m/kg). This applies to both bolt-on rack jack installations and bolt-on mounting bracket installations.
Torque the three 3/8-16 grade 5 bolts with washers to 15-20 ft. lbs. (2-2.7 m/kg) when bolting the jack A-plate to the 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.
Use a 3/16 inch (4.8 mm) fillet weld for all weld-on installations, including direct-mount, A-plate, and pivot tube mounting. All welding must be performed by an AWS certified welder.
Weld 1 inch in 2 locations on both sides of the jack using a 3/16 inch fillet weld. This means a total of 4 welds, each 1 inch long, positioned on both the left and right sides of the jack.
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. 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 1-800-632-3290 or www.cequentgroup.com.
No. These jacks are designed for vertical loading only. Excessive side forces may cause jack failure and must be avoided.
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. Before manually moving the trailer, crank the jack to the lowest position. Minimize movement of the implement while the jack is under load. Do not use the jack as a transport device for the implement it is attached to.
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 the drop foot or caster 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 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.
No. 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: For side-wind models, the internal gearing and bushings must be kept lubricated. For top-wind models, apply a 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.
If the product is used in a marine environment, flush the jack assembly and bushings with fresh water, and apply fresh lubricant.
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 a heavy duty caster: Use 4 3/8 inch bolts, washers, and locknuts as shown in the manual. 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.
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 in all handle swing and swivel positions if applicable.
No. Tongue jacks are not designed for mounting to round tongues. They are designed for flat or rectangular tongues only.
Six mounting styles: bolt-on rack jack, snap ring, bolt-thru, A-plate (for A-plate couplers), direct-mount (weld-on), and weld-on pivot tube (round or square). Choose based on your trailer's coupler type and tongue design.
Only if you choose a weld-on mounting style (A-plate, direct-mount, or pivot tube). Bolt-on, snap ring, and bolt-thru installations do not require welding. All welding must be performed by an AWS certified welder.
Torque all locknuts to 25 ft. lbs. (3.5 m/kg). For A-plate bolts, torque to 15-20 ft. lbs. (2-2.7 m/kg).
Fully retract and rotate the jack. If equipped with an optional drop foot or caster, remove it before towing to maximize ground clearance.
Capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. Never exceed the maximum rated capacity shown on the product's stamped markings or decals. Contact Cequent Performance Products at 1-800-632-3290 if uncertain.
Perform maintenance 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 reapply 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. If movement persists after tightening, the bushing may be worn or damaged. Always replace bent, broken, or worn parts before using the product.
For side-wind models, the internal gearing and bushings must be kept lubricated. Apply a small amount of automotive grease to the internal gearing and rotate the jack handle to distribute the grease evenly. For top-wind models, apply lightweight oil to the screw stem. Perform these maintenance procedures at least annually. If the jack still does not operate smoothly, contact Cequent Performance Products at 1-800-632-3290.
| Part Number | Model Number | Description | Lift Capacity (lbs.) | Pin (in.) | Handle Style | Travel (in.) | A Retracted (in.) | B Extended (in.) | C Clearance (in.) |
|---|---|---|---|---|---|---|---|---|---|
| 158451 | TWS 158 DTSF w/P&C | Includes Footplate and Male Mating Mount | 2,000 | 9/16 | Topwind | 10.00 | 11.00 | 21.00 | 4.00 |
| 158452 | TWL 158 DTSF w/P&C | Includes Footplate and Male Mating Mount | 2,000 | 9/16 | Topwind | 15.00 | 14.50 | 29.50 | 10.00 |
| 158486 | TWL 158 DTSF w/P&C | Includes Footplate and Male Mating Mount | 2,000 | 9/16 | Topwind | 15.00 | 16.00 | 31.00 | 10.00 |
| 150441 | TWS 150 DTSF w/P&C | Includes Footplate, Clear Zinc Finish | 2,000 | 9/16 | Topwind | 10.00 | 11.00 | 21.00 | 4.00 |
| 158109 | SWS 158 DTSF w/P&C | Includes Footplate and Male Mating Mount | 2,000 | 9/16 | Sidewind | 15.00 | 14.50 | 29.50 | 12.20 |
| 158151 | SWL 158 DTSF w/P&C | Includes Footplate and Male Mating Mount | 2,000 | 9/16 | Sidewind | 10.00 | 11.00 | 21.00 | 8.00 |
| 178101 | TWS 178 DTSF w/P&C | Includes Footplate and Male Mating Mount | 5,000 | 9/16 | Topwind | 10.00 | 11.25 | 21.25 | 6.00 |
| 178109 | TWS 178 DTSF w/P&C | Includes Footplate and Male Mating Mount | 5,000 | 9/16 | Sidewind | 15.00 | 15.20 | 30.50 | 6.20 |
| 178110 | TWS 178 DTSF | Includes Footplate and Male Mating Mount | 5,000 | 9/16 | Topwind | 10.00 | 10.50 | 16.80 | 8.50 |
| 178112 | TWS 178 DTSF | Includes Footplate | 5,000 | 9/16 | Topwind | 10.00 | 10.50 | 16.80 | 8.50 |
| 178151 | TWL 178 DTSF w/P&C | Includes Footplate and Male Mating Mount | 5,000 | 9/16 | Topwind | 15.00 | 14.70 | 29.70 | 10.00 |
| 178201 | SWS 178 DTSF w/P&C | Includes Footplate and Male Mating Mount | 5,000 | 5/8 | Sidewind | 10.00 | 10.40 | 20.80 | 6.40 |
| 178203 | SWL 178 DTSF w/P&C | Includes Footplate and Male Mating Mount | 5,000 | 5/8 | Sidewind | 15.00 | 15.00 | 30.30 | 6.40 |
| 620023 | 5 SM-15-0 w/P&C | Includes Footplate and Male Mating Mount | 5,000 | 5/8 | Sidewind | 15.00 | 15.50 | 30.50 | 6.20 |
| 620057 | 7 SM -15-0 w/P&C | Includes Footplate and Male Mating Mount | 7,000 | 5/8 | Sidewind | 15.00 | 16.00 | 31.00 | 4.65 |
| 198100 | TWS 198 DTSM w/P&C | Includes Footplate and Female Mating Mount | 7,000 | 5/8 | Topwind | 10.00 | 10.80 | 20.80 | 4.50 |
| 198200 | TWL 198 DTSM w/P&C | Includes Footplate and Female Mating Mount | 7,000 | 5/8 | Topwind | 15.00 | 15.80 | 30.80 | 4.25 |
| 198150 | SWS 198 DTSM w/P&C | Includes Footplate and Female Mating Mount | 7,000 | 5/8 | Sidewind | 10.00 | 11.00 | 21.00 | 5.00 |
| 198250 | SWL 198 DTSM w/P&C | Includes Footplate and Female Mating Mount | 7,000 | 5/8 | Sidewind | 15.00 | 16.00 | 31.00 | 5.00 |
Sam
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
