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Bulldog
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The First 2-Speed Gearbox Designed with a Drop Leg Jack in Mind. BULLDOG's 2-speed 12,000 lbs. support capacity square jack makes cranking easier when fully loaded and faster when unloaded. In low gear, the ratio delivers full lifting power at a super-smooth, easy-lifting 27 turns per 1" (planetary) and 29 turns per 1" (traditional) of travel. In high gear, the cranking ratio is a speedy 9 turns per 1" of travel, the fastest in its weight class.
| BRAND: | BULLDOG |
| PART NUMBER: | 183903 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 77 LBS |
| CAPACITY: | 12,000 LBS. |
| TRAVEL: | 12.5 IN. |
| RETRACTED: | 29.5 IN. |
| EXTENDED: | 55.6 IN. |
| MODEL NUMBER: | SWQ 180 DL-BX W/SR T |
| HANDLE STYLE: | TRADITIONAL |
| FOOT PLATE SIZE: | 8.0 IN. X 8.5 IN. |
| FOOT LENGTH: | 8 IN. |
| FOOT WIDTH: | 8.5 IN. |
| MATERIAL: | STEEL |
| SPEEDY LIFT: | NO |
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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How to Maintain Your BULLDOG® Square Tube Jack
This is a 12,000 lb square jack. However, the actual capacity is limited to the lesser of the jack, footplate, or caster wheel capacity. You must refer to the stamped markings or decals on the product itself to obtain the rated capacity for your specific unit. If you are uncertain, contact Cequent Performance Products at 1-800-521-0510 or visit www.cequentgroup.com.
The jack has a 2-speed shift pattern controlled by the handle. High gear is engaged when the shaft is pushed in. Low gear is engaged when the shaft is pulled out. The jack handle moves 5/8″ to 3/4″ while shifting, and this clearance must be accounted for during installation to prevent interference.
No. These jacks are designed for mounting to flat surfaces only. Before mounting, 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 (in both gears) and swivel positions if applicable, and check again after installation is complete.
These jacks are designed for vertical loading only. Excessive side forces may cause jack failure and must be avoided.
All welding must be performed by an AWS (American Welding Society) certified welder. This is a mandatory requirement for both direct-mount and pivot tube mounting installations.
For direct-mount installation, three 2″ long 1/4″ fillet welds must be placed on both sides of the jack along the contacting surface. The welds should be as far apart as possible to maximize strength under load. All welding must be performed by an AWS certified welder.
The non-beveled side of the pivot tube is welded to the tongue. Place the weld-on pivot tube against the tongue and weld all around with a 1/4″ fillet weld. Align one set of pivot mount holes vertically. Then mate the jack to the pivot tube and secure with the supplied pin. All welding must be performed by an AWS certified welder.
If mounting in a tandem application, align the jacks carefully so they raise and lower together and share the load equally.
The drop leg pin is a safety component that must be fully inserted before using the jack. When using the drop leg, make certain the drop leg pin is fully inserted before using the jack. If this 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. Keep clear of the pinch point at the drop leg pin, as the drop leg will naturally drop or retract very quickly depending on the model.
Never position any part of your body under any portion of this jack or the load being supported. Fully retract and/or rotate the jack before towing. 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 this product or the load being supported. Never exceed the maximum rated capacity. Never attempt to adjust the drop leg when the jack is under load.
1) Verify that the jack is not supporting any load. 2) If extended, place your foot on the foot plate to control the return of the drop leg. 3) Disengage the drop leg pin by rotating to the disengaged position. 4) Carefully move the drop leg to the desired position using your foot. 5) Engage the drop leg pin by rotating it to the engaged position and into the desired adjustment hole. 6) Verify that the drop leg pin is fully inserted into the jack by checking for no clearance between the drop leg pin and housing. If you see clearance, adjust the drop leg to fully seat the pin. You may need to lubricate the drop leg pin assembly. If you are unable to fully seat the pin, do not use the jack.
1) Verify that the jack is not supporting any load. 2) If retracted, grasp the handle of the foot plate to control the fall of the drop leg. 3) Disengage the drop leg pin by rotating to the disengaged position. 4) Carefully move the drop leg to the desired position. 5) Engage the drop leg pin by rotating to the engaged position and into the desired adjustment hole. 6) Verify that the drop leg pin is fully inserted into the jack by checking for no clearance between the drop leg pin and housing. If you see clearance, adjust the drop leg to fully seat the pin. You may need to lubricate the drop leg pin assembly. If you are unable to fully seat the pin, do not use the jack.
The following procedures should be performed at least annually: The gears, bushings, and screw of the jack must be kept lubricated. For side-wind models, apply a small amount of automotive grease with a grease gun at the lubrication points found on the side of the jack near the input shaft, then rotate the jack handle to distribute the grease evenly. A lightweight oil must be applied to the input shaft bushings at both sides of the jack or gearbox. For top-wind models, the screw-stem should be lubricated with a lightweight oil. If equipped, the drop leg pin and spring must be kept clean and lubricated with a lightweight oil.
Use automotive grease (applied with a grease gun) for the gears, bushings, and screw on side-wind models. Use lightweight oil for the input shaft bushings at both sides of the jack or gearbox, and for the screw-stem on top-wind models. If equipped, the drop leg pin and spring must be kept clean and lubricated with lightweight oil.
Cequent Performance Products warrants to the original consumer purchaser that the product will be free from material defects in both material and workmanship for a period of five years, ordinary wear and tear excepted, provided that installation and use of the product is in accordance with product instructions. The warranty does not cover normal wear and tear, damage from abuse, neglect, misuse, accident, misapplication, overloading, improper installation (including welds), improper maintenance and repair, or product alteration by anyone other than the manufacturer. To make a warranty claim, contact Cequent Performance Products at 1-800-521-0510 or 47774 Anchor Ct. W., Plymouth, MI 48170, and identify the product by model number. You will be responsible for return shipping costs.
Replacement parts are available through Cequent Performance Products' Customer Service Department at 1-800-521-0510. Please specify the product model number when ordering. Use only Cequent Performance Products parts or parts of equal quality for repair.
This jack is designed for mounting to flat surfaces only and for vertical loading. Before installation, confirm there is no interference from the tow vehicle, tongue, ground, or other accessories in all positions including handle swing and swivel. Refer to the manual for specific fitment requirements for your trailer.
Yes. All welding must be performed by an AWS (American Welding Society) certified welder. This is required for both direct-mount and pivot tube mounting installations.
For direct-mount: three 2″ long 1/4″ fillet welds on both sides of the jack, spaced as far apart as possible. For pivot tube mount: weld all around the pivot tube with a 1/4″ fillet weld. All welding must be AWS certified.
Fully retract and/or rotate the jack before towing. The jack handle moves 5/8″ to 3/4″ while shifting, so ensure clearance is accounted for during installation.
Never position any part of your body under any portion of this jack or the load being supported. Never exceed the maximum rated capacity. Secure the load, vehicle, and trailer from rolling by blocking wheels when operating the jack.
Perform maintenance at least annually. Lubricate the gears, bushings, and screw with automotive grease (side-wind models) or lightweight oil (top-wind models). Apply lightweight oil to input shaft bushings and drop leg pin and spring if equipped.
Five years from purchase, covering material defects in material and workmanship, provided installation and use follow the product instructions. The warranty does not cover wear and tear, abuse, misuse, improper installation, or product alteration.
If you see clearance between the drop leg pin and housing, the pin is not fully seated. You must adjust the drop leg to fully seat the pin into the hole location. You may need to lubricate the drop leg pin assembly as described in the maintenance section. If you are unable to fully seat the pin, do not use the jack.
You may need to lubricate the drop leg pin assembly. Apply lightweight oil to the drop leg pin and spring as described in the maintenance section. Rotate the jack handle to distribute lubricant evenly. If the pin still cannot be fully seated after lubrication, do not use the jack.
| Part Number | Model Number | Support Capacity (lbs.) | Lift Capacity (lbs.) | Gearbox Style | Travel (in.) | A Retracted (in.) | B Extended (in.) | Pin Location | Companion |
|---|---|---|---|---|---|---|---|---|---|
| Non-Spring Return | |||||||||
| 183401 | SWQ 183 DL-BX | 12,000 | 10,000 | Planetary | 12.50 | 28.50 | 54.60 | Side | 182411 |
| 183416 | SWQ 183 DL-BX | 12,000 | 10,000 | Planetary | 12.50 | 29.50 | 55.60 | Front | 182415 |
| 183901 | SWQ 180 DL-BX T | 12,000 | 10,000 | Traditional | 12.50 | 29.50 | 55.60 | Front | 182415 |
| Spring Return | |||||||||
| 183816 | SWQ 183 DL-BX w/SR | 12,000 | 10,000 | Planetary | 12.50 | 29.50 | 55.60 | Front | 182815 |
| 183902 | SWQ 180 DL-B w/SRT | 12,000 | 10,000 | Traditional | 12.50 | 28.50 | 54.60 | Side | 182805 |
| 183903 | SWQ 180 DL-BX w/SR T | 12,000 | 10,000 | Traditional | 12.50 | 29.50 | 55.60 | Front | 182815 |
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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
