Bulldog Round Trailer Jack, Side Mount, 5,000 lbs. Lift Capacity, Side Wind, Weld-On, 10 in. Travel BD178201Bulldog$133.29Out of Stock
View productAsk a Question About This Product
Our in-house experts typically reply within one business day.
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!
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: | 178109 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 17.8 LBS |
| CAPACITY: | 5,000 LBS. |
| TRAVEL: | 10 IN. |
| RETRACTED: | 10.5 IN. |
| EXTENDED: | 20.5 IN. |
| CLEARANCE: | 6.2 IN. |
| MODEL NUMBER: | SWS 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: | 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.
Experts available to answer your questions
Call 888-634-94945 Years
A tongue jack is a mechanical device mounted to a trailer tongue that raises and lowers the front of the trailer for coupling and uncoupling from the tow vehicle. This manual covers multiple styles: bolt-on rack jacks, snap ring models, bolt-thru models, A-plate models, direct-mount (weld-on), and pivot tube models. They are available with side-wind or top-wind handle configurations and optional drop foot, drop leg, or caster wheel accessories.
The manual covers six mounting styles: (1) Bolt-on rack jack—bolts directly to tongue; (2) Bolt-on mounting bracket—uses four bolts through mounting straps on opposite side of tongue; (3) Snap ring model—snap ring seats in groove on mount; (4) Bolt-thru model—uses bushing and locknut assembly; (5) A-plate mounting—for trailers with A-plate couplers, available bolt-on or weld-on; (6) Direct-mount (weld-on)—welded directly to tongue; (7) Weld-on pivot tube—for round or square pivot tubes. Choose based on your trailer's coupler type and tongue configuration.
No. The manual explicitly states: 'These jacks are not designed for mounting to round tongues.' Tongue jacks are designed for flat or A-plate tongues. If you have a round tongue, you will need a different solution or a special bracket; contact Cequent Performance Products at 1-800-521-0510 for alternatives.
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 mounting style. Verify your coupler type before purchasing.
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.
Only if you are installing a weld-on model. The manual states: 'All welding must be performed by an AWS certified welder.' This applies to direct-mount (weld-on), A-plate weld-on, and weld-on pivot tube installations. Bolt-on models do not require welding. Do not attempt to weld bolt-on brackets or straps to the tongue; special weld-on brackets are available for welded applications.
For bolt-on rack jacks, the manual specifies supplied bolts inserted into holes corresponding to tongue width, and locknuts for securing. For bolt-on mounting bracket models, four bolts are inserted through the mounting bracket and mounting straps, secured with locknuts. For snap ring models, a snap ring is included. For bolt-thru models, a bushing and locknut assembly is used. For A-plate bolt-on models, three 3/8-16 grade 5 bolts with washers are required (not all may be included). Refer to your specific product documentation for a complete parts list.
The manual does not specify required tools for bolt-on installation. However, you will need a wrench or socket to tighten bolts and locknuts to the specified torque of 25 ft. lbs. For weld-on models, an AWS-certified welder and welding equipment are required. For models with optional caster wheels or handles, you may need a wrench to assemble those components.
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, check for clearance of the handle, trailer light cables, and coupler.
1) Assure the correct mounting hole pattern for your tongue size. The gap between mounting bolts and tongue must not exceed 1/16 inch. 2) 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. 3) Insert the four bolts through the mounting bracket and mounting straps. Upper bolts should rest on the top of the tongue; 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.
1) Before installing the snap ring, inspect the snap ring groove and remove any debris. 2) Place the jack bracket over the mount and place the snap ring in the groove. 3) Seat the snap ring fully into the groove. The snap ring must be fully seated to secure the jack properly.
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 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. 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, 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. Align the foot (with the jack and coupler) as desired before welding. 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 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.
For bolt-on rack jacks and bolt-on mounting bracket models, torque all locknuts to 25 ft. lbs. For A-plate models bolted to the coupler, use three 3/8-16 grade 5 bolts with washers and torque to 15-20 ft. lbs.
The gap between mounting bolts and the tongue must not exceed 1/16 inch (1.5 mm). This applies to bolt-on mounting bracket installations. Upper bolts should rest on the top of the tongue; lower bolts should be less than 1/16 inch from the bottom of the tongue.
All weld-on installations require a 3/16 inch fillet weld. This applies to direct-mount, A-plate weld-on, and weld-on pivot tube installations. All welding must be performed by an AWS certified welder.
For direct-mount (weld-on) installation, weld 1 inch in 2 locations on both sides of the jack using a 3/16 inch fillet weld. This creates four 1-inch welds total (two on each side).
Before towing, fully retract and rotate the jack. If using an optional drop foot or caster, always remove it before towing to maximize ground clearance. If the jack has 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 the jack is a swivel model, 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.
These jacks are designed for vertical loading only. Excessive side forces may cause jack failure and must be avoided. Do not apply lateral or horizontal forces to the jack.
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. Before manually moving the trailer, crank the jack to the lowest position. 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.
If the 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 the jack is a swivel model, 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 jack 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.
If the jack is a rack jack, do not raise the gear housing above the inner tube. Raising it beyond this point may cause damage or failure.
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, the screw stem must be lubricated. If the jack is used in a marine environment, flush the jack assembly and bushings with fresh water and apply fresh lubricant after each use.
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. If equipped, the axle bolt and nut assembly of the caster wheel must also be lubricated with the same lightweight oil.
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 more frequently than the standard annual maintenance to prevent corrosion and salt damage.
Always replace bent, broken, or worn parts before using the jack. Inspect the jack regularly and do not operate it if any components are damaged.
Use only Cequent Performance Products parts or parts of equal quality for repair. Replacement parts are available through Cequent Performance Products Customer Service Department at 1-800-521-0510. Please specify the product model number when ordering.
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 four 3/8 inch bolts, washers, and locknuts as shown in the manual. Note: Jack capacity is limited to the lesser of the jack or caster capacity.
For side-wind models: 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. For top-wind models: 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.
Tongue jacks are available in multiple mounting styles: bolt-on rack, bolt-on bracket, snap ring, bolt-thru, A-plate (for A-plate couplers), direct-mount (weld-on), and pivot tube (weld-on). They are not designed for round tongues. Verify your trailer's coupler type and tongue configuration, then select the appropriate mounting style. Contact Cequent Performance Products at 1-800-521-0510 if unsure.
Only if you choose a weld-on model (direct-mount, A-plate weld-on, or pivot tube weld-on). All welding must be performed by an AWS-certified welder. Bolt-on models do not require welding and can be installed with basic hand tools.
Torque all locknuts to 25 ft. lbs. for bolt-on rack jacks and bolt-on mounting bracket models. For A-plate models, torque the three 3/8-16 grade 5 bolts to 15-20 ft. lbs.
Fully retract and rotate the jack before towing. Remove any optional drop foot or caster wheel before towing to maximize ground clearance. Ensure all pins are fully inserted and all fasteners are tight.
Perform lubrication at least annually. Side-wind models require automotive grease on internal gearing and lightweight oil on the handle. Top-wind models require lightweight oil on the screw stem. In marine environments, flush and lubricate more frequently.
No. The purchaser/owner must not alter or modify the product. Do not attempt to weld bolt-on brackets to the tongue; special weld-on brackets are available for welded applications. Any modifications not specified in the manual will void the warranty.
Before installing the snap ring, inspect the snap ring groove and remove any debris. Debris in the groove prevents the snap ring from seating properly. Once the groove is clean, place the snap ring in the groove and seat it fully. The snap ring must be completely inserted into the groove to stay secure. If the groove is damaged, the snap ring may not hold; contact Cequent Performance Products at 1-800-521-0510 for a replacement jack bracket.
The internal gearing and bushings may need lubrication. 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 grease gun on the lubrication point near the crank. Rotate the jack handle to distribute the grease evenly. For top-wind models, apply lightweight oil to the screw stem. If noise persists after lubrication, the jack may have internal damage; contact Cequent Performance Products at 1-800-521-0510.
Ensure all bolts are torqued to the correct specification: 25 ft. lbs. for bolt-on rack jacks and bolt-on mounting bracket models, or 15-20 ft. lbs. for A-plate models. Use a torque wrench to verify the torque. If bolts continue to loosen, the mounting holes or threads may be damaged. Inspect the holes and threads for damage. If damaged, you may need to drill new holes or use larger bolts. Contact Cequent Performance Products at 1-800-521-0510 for guidance.
First, ensure the jack is not under load and is in the lowest position. Check that all pins (pivot pin, plunger pin, drop foot pin, or drop leg pin) are fully inserted through both sides of their respective tubes. If pins are not fully inserted, the jack may bind. Also check that the jack is not frozen or corroded, especially if used in a marine environment. If the jack was used in a marine environment, flush the assembly with fresh water and apply fresh lubricant. If the problem persists, contact Cequent Performance Products at 1-800-521-0510.
After installation, check for clearance of the handle, trailer light cables, and coupler. If interference is found, the jack may not be installed in the correct position. For bolt-on models, reposition the jack and remount it. For weld-on models, the jack may need to be repositioned before welding. If the jack cannot be repositioned to clear the cables and coupler, you may need to use a different mounting style or location. Contact Cequent Performance Products at 1-800-521-0510 for assistance.
| 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 |
On Sale Today
Original price was $127.50. Current price is $85.84.You save $41.66 (33%)
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
George
Ordered online. Shipment arrived on time and with all the correct parts. Great customer service and friendly staff. Also, pricing was great!
May 22, 2023