Bulldog Round Trailer Jack, Side Mount, 5,000 lbs. Lift Capacity, Top Wind, Weld-On, 10 in. Travel BD171401Bulldog$111.51Out 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: | 178101 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 12.44 LBS |
| CAPACITY: | 5,000 LBS. LIFT |
| TRAVEL: | 10 IN. |
| RETRACTED: | 11.25 IN. |
| EXTENDED: | 21.25 IN. |
| CLEARANCE: | 4 IN. |
| MODEL NUMBER: | TWS 178 DTSF W/P&C |
| 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: | 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 Rev-D 6077. This manual applies to Bulldog®, Fulton®, Pro-Series®, and Reese Towpower® tongue jack products.
Tongue jacks are available in multiple mounting styles: bolt-on rack jacks, bolt-on mounting brackets, snap ring models, bolt-thru models, A-plate mounting (for A-plate couplers), direct-mount (weld-on), and weld-on pivot tube mounting (for round and square pivot tubes). The correct style depends on your trailer coupler and tongue configuration.
No. The manual explicitly states: 'These jacks are not designed for mounting to round tongues.' They are designed for flat or A-plate tongues depending on the mounting style selected.
No. A-plate jacks are specifically designed for mounting to trailers with A-plate couplers. If your trailer has an A-plate coupler, you must use an A-plate jack model, not a bolt-on model. Bolt-on jacks are for standard flat-tongue trailers.
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. Check again after installation is complete. This includes clearance for 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 all bolt-on mounting styles. Proper alignment ensures secure fastening and prevents movement.
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. Ensure the gap between mounting bolts and tongue does not exceed 1/16 inch.
1) Place the jack against the tongue and position the mounting straps on the opposite side. 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. 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 and place the snap ring in the groove. 2) Seat the snap ring fully into the groove. Before installing, 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. 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 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. 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. 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.
The manual does not specify whether drilling is required. It states that you must use the correct mounting hole pattern for your tongue size and that holes must be aligned, but does not explicitly state whether pre-drilled holes are present or must be created. Contact Cequent Performance Products at 1-800-632-3290 or www.cequentgroup.com for clarification on your specific jack model.
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 use the appropriate weld-on mounting style, not a bolt-on model.
All bolt-on mounting fasteners (locknuts) must be torqued to 25 ft. lbs. This applies to bolt-on rack jacks and bolt-on mounting bracket installations.
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, A-plate, and pivot tube mounting styles. All welding must be performed by an AWS certified welder.
Use 4 bolts of 3/8 inch diameter with washers and locknuts as shown in the manual. The jack capacity is limited to the lesser of the jack or caster capacity.
Fully retract and rotate the jack before towing. If using an optional drop foot or caster, always remove it before towing to maximize ground clearance. Before manually moving the trailer, crank the jack to its 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.
These jacks are designed for vertical loading only. Excessive side forces may cause jack failure and must be avoided.
Secure the load, vehicle, and trailer from rolling by blocking the wheels when operating the jack or coupling the trailer.
When using 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 using an optional drop foot or caster, always remove it 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 jack is a swivel jack, lock the plunger pin into a hole in the mounting bracket before raising or lowering the tongue.
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.
No. This product is not intended to be used as a transport device for the implement it is attached to. Minimize movement of the implement while the jack is under load.
Operator and bystanders should never position any part of their body under any portion of the jack or the load being supported. Do not allow children to play on or around the jack or the load being supported.
If the jack is a rack jack, do not raise the gear housing above the inner tube. This prevents damage to the internal mechanism.
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 fasteners are properly torqued to specification.
The following procedures should be performed at least annually: lubrication of internal gearing and bushings (for side-wind models), lubrication of the handle unit and caster wheel axle bolt and nut assembly (for side-wind models), and lubrication of the screw stem (for top-wind models). 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.
For top-wind models, apply a lightweight oil to the screw stem.
If equipped, the axle bolt and nut assembly of the caster wheel must be lubricated with lightweight oil. 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.
If the product is used in a marine environment, flush the jack assembly and bushings with fresh water and apply fresh lubricant at least annually.
Always replace bent, broken, or worn parts before using this product.
Contact Cequent Performance Products Customer Service Department at 1-800-632-3290 or www.cequentgroup.com. Please specify the product model number. For warranty claims, contact 47912 Halyard Dr. Suite 100, Plymouth, MI 48170.
Bulldog® and Fulton® tongue jacks are warranted to be free from defects in both material and workmanship for a period of five years, provided that installation and use of the product is in accordance with product instructions. This warranty covers the original consumer purchaser only and is not transferable.
Pro-Series® and Reese Towpower® tongue jacks are warranted to be free from defects in both material and workmanship for a period of one year, provided that installation and use of the product is in accordance with product instructions. This warranty covers the original consumer purchaser only and is not transferable.
The limited warranty does not cover: (a) normal wear and tear; (b) damage through abuse, neglect, misuse, or as a result of any accident or in any other manner; (c) damage from misapplication, overloading, or improper installation, including welds; (d) improper maintenance and repair; and (e) product alteration in any manner by anyone other than the manufacturer, with the sole exception of alterations made pursuant to product instructions and in a workmanlike manner.
To make a warranty claim, contact Cequent Performance Products at 47912 Halyard Dr. Suite 100, Plymouth, MI 48170, 1-800-632-3290, identify the product by model number, and follow the claim instructions that will be provided. You must provide the product and the purchase receipt to process your warranty claim. You will be responsible for return shipping costs. Repair or replacement is your sole remedy under this limited warranty.
The manual covers multiple mounting styles (bolt-on, weld-on, snap ring, A-plate, pivot tube). Confirm your trailer has a flat or A-plate tongue (not round), and select the correct mounting style for your coupler type. Contact Cequent Performance Products at 1-800-632-3290 to verify fitment for your specific trailer.
Only if you choose a weld-on mounting style (direct-mount, A-plate, or pivot tube). Bolt-on, snap ring, and bolt-thru models do not require welding. All welding must be performed by an AWS certified welder.
Torque all locknuts to 25 ft. lbs. for bolt-on rack jacks and bolt-on mounting bracket installations. For A-plate bolts, torque to 15-20 ft. lbs.
Fully retract and rotate the jack before towing. Remove any optional drop foot or caster before towing to maximize ground clearance.
Perform lubrication procedures at least annually. For side-wind models, apply automotive grease to internal gearing and lightweight oil to the handle unit. For top-wind models, apply lightweight oil to the screw stem. In marine environments, flush with fresh water and apply fresh lubricant.
The jack 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.
The gap between mounting bolts and the tongue must not exceed 1/16 inch (1.5 mm). This applies to all bolt-on mounting styles.
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.
For side-wind models, the internal gearing and bushings must be kept lubricated. 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. Perform this maintenance at least annually.
Verify that you have not exceeded the maximum rated capacity of the jack. The jack capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. Refer to the stamped markings or decals on the product to obtain the rated capacity. Ensure all fasteners are properly torqued to specification. If the jack is still not holding load after these checks, contact Cequent Performance Products at 1-800-632-3290.
Verify that the gap between the mounting bolts and the tongue does not exceed 1/16 inch. Ensure all bolts are properly aligned and torqued to 25 ft. lbs. for bolt-on models. Check that the mounting bracket is positioned correctly with the flat surface against the tongue. If the issue persists, the tongue may be bent or damaged; contact Cequent Performance Products at 1-800-632-3290.
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| 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 |
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May 22, 2023