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Bulldog
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Complete kit bundle containing all necessary components for your project. Professional-grade components designed for reliable performance and long-lasting durability.
| BRAND: | BULLDOG |
| PART NUMBER: | 028584 |
| WARRANTY: | LIMITED 5 YEAR WARRANTY |
| WEIGHT: | 9.2 LBS |
| BALL DIAMETER: | 2 IN. |
| CAPACITY: | 7,000 LBS. |
| MODEL NUMBER: | 3B6M |
| MATERIAL: | STEEL |
| HITCH CLASS: | IV |
| SAFETY CHAINS INCLUDED: | NO |
Keywords: BD028584-30PK bundle kit, complete kit, professional components, industrial kit, BD028584, Bulldog
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 Bulldog Collar-Lok™ coupler is a trailer tongue coupler that connects a trailer to a towing vehicle via a hitch ball. It is available in three styles (L-Style, H-Style, and M-Style) and four models (2B, 3B, 4B, and 5B) with different minimum tongue overlap requirements. The coupler features a collar mechanism that captures and secures the hitch ball, and is rated according to SAE J684 standards.
Minimum tongue overlap varies by model: 2B, 4B, and 5B models require 8.5" minimum overlap; 3B model requires 6.5" minimum overlap. One model allows 7" minimum overlap, and another allows 2.5" minimum overlap (tongue may fit over or into coupler). The coupler internal stop must be butted against the end of the trailer tongue for maximum overlap.
No. The 3.0" channel is not included with the coupler and must be purchased separately. The manual indicates "3.0" Channel (Not included)" in the parts diagram.
The coupler is supplied with bolts and a retaining pin. The exact number and size of bolts must be specified by the trailer manufacturer. Grade 5 bolts with locknuts are required for bolt-on installation.
The manual does not specify which tools are required for installation. For weld-on installation, an AWS certified welder is required. For bolt-on installation, tools to tighten bolts to the specified torque values are needed, but specific tool names are not listed.
Yes. All welding must be performed by an AWS (American Welding Society) certified welder. This is stated as a requirement multiple times in the manual and is non-negotiable for safe installation.
Before mounting the coupler, 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 both open and closed coupler positions before installation. After installation is complete, check for interference again to ensure coupler operation has not been impaired.
Weld 3/16" around the interface between the coupler and tongue. Ensure the coupler internal stop is butted against the end of the trailer tongue for maximum overlap. Do not create undercut or washout while welding. All welding must be performed by an AWS certified welder.
1. Assure the coupler internal stop is butted against the end of the trailer tongue for maximum overlap. 2. Torque grade 5 bolts with locknuts to the appropriate SAE proof load specifications (see torque table). 3. Do not allow any deformation of the trailer tongue end. The number and size of fasteners required must be specified by the trailer manufacturer.
Torque specifications for grade 5 bolts are: 3/8" diameter – 23 ft. lbs.; 1/2" diameter – 55 ft. lbs.; 5/8" diameter – 110 ft. lbs. These are SAE proof load specifications. Channel hardware should be tightened to 75–100 lb-ft (as noted in the Spanish and French sections of the manual).
1. Block trailer wheels. 2. Align hitch ball beneath coupler. 3. If coupler is closed, open it by removing the pin behind the collar and sliding the collar away from the ball pocket; ensure coupler cap is open. 4. Lower trailer onto hitch ball. 5. Visually check that hitch ball is fully seated in coupler. 6. Close coupler cap carefully; ensure collar springs toward ball pocket and captures cap. 7. Reinsert pin behind collar. Do not tow without pin in place. 8. Always secure safety chains to vehicle before towing per SAE J684.
1. Block trailer wheels. 2. Align hitch ball beneath coupler. 3. If coupler is closed, open it by removing the pin in the latch and lifting the latch; ensure coupler cap is open. 4. Lower trailer onto hitch ball. 5. Visually check that hitch ball is fully seated in coupler. 6. Close coupler cap carefully and lower latch; ensure collar springs toward ball pocket and captures cap. 7. Reinsert pin in latch. Do not tow without pin in place. 8. Always secure safety chains to vehicle before towing per SAE J684.
1. Block trailer wheels. 2. Open coupler by removing pin behind collar and sliding collar away from ball pocket; ensure coupler cap is open. 3. Raise trailer from hitch ball.
1. Block trailer wheels. 2. Open coupler by removing pin in latch and lifting latch; ensure coupler cap is open. 3. Raise trailer from hitch ball.
Do not exceed the lesser of the mounting bracket, coupler, hitch, vehicle, ball, or trailer weight ratings (including load). Never exceed the maximum rated capacity. Refer to 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.
Use only the proper ball for the coupler as indicated on the coupler body. If uncertain about which ball size is correct, contact Cequent Performance Products at 1-800-632-3290 or www.cequentgroup.com.
No. Do not tow if the ball is not fully seated and/or the coupler is not closed. Before towing, check that the hitch ball is fully seated in the coupler ball pocket, close the coupler, and insert the pin behind the collar or through the latch.
Use caution when uncoupling as the tongue may rise suddenly due to negative tongue load. Always block trailer wheels before latching or unlatching the coupler. Never position any part of your body under any portion of the product or the load being supported.
Before towing, perform the following checks: 1. Check vehicle, channel, hitch, hitch ball, and coupler for signs of wear or damage and that the coupler handle opens and closes freely. 2. Replace bent, broken, or worn parts before using. 3. Check that hitch ball is fully seated in coupler ball pocket, close coupler, and insert pin. 4. Check channel hardware for wear and proper tightness; tighten to appropriate SAE proof load specifications using grade 5 hardware. 5. Ensure trailer safety chains are properly connected per SAE J684. 6. Verify all trailer lighting is hooked up and working properly.
Perform the following maintenance at least annually: 1. Check welds and mounting bolt torque. 2. Grease the ball pocket. 3. Oil pivot points with SAE 30 wt. motor oil. 4. Inspect retaining pins and replace if necessary. Keep the ball pocket and mechanism clean. When parking or storing the trailer, keep the coupler off the ground so dirt and foreign material will not build up in the coupler ball pocket.
Keep the ball pocket and mechanism clean by regularly removing dirt and foreign material. When parking or storing the trailer, keep the coupler off the ground so dirt and other foreign material will not build up in the coupler ball pocket. Grease the ball pocket at least annually.
Do not use the coupler if its operation has been impaired in any way. After installing the channel and/or coupler, if coupler operation has been impaired, do not use it. If the coupler and/or channel is deformed or damaged, replace the complete coupler and bracket.
Cequent Performance Products warrants the coupler to be free from material defects in both material and workmanship for five years from the date of original purchase, provided installation and use are in accordance with the product instructions. The warranty does not cover normal wear and tear, damage from abuse, misuse, overloading, improper installation (including welds), improper maintenance, or product alterations. The warranty is not transferable. For warranty claims, contact Cequent Performance Products at 1-800-632-3290 with your model number and purchase receipt.
The coupler is available in four models (2B, 3B, 4B, 5B) with different minimum tongue overlap requirements (2.5", 6.5", 7", or 8.5"). Confirm your trailer tongue length matches the model's minimum overlap requirement. The coupler must be rigidly attached to the trailer. Contact Cequent Performance Products at 1-800-632-3290 if you are unsure which model fits your trailer.
No, the 3.0" channel is not included and must be purchased separately.
Yes, if you are installing a weld-on coupler, all welding must be performed by an AWS certified welder. For bolt-on installation, an AWS certified welder is not required.
Weld 3/16" around the interface between the coupler and tongue. Do not create undercut or washout while welding. The coupler internal stop must be butted against the end of the trailer tongue for maximum overlap.
Torque 1/2" grade 5 bolts to 55 ft. lbs. according to SAE proof load specifications.
No. Do not tow without the pin in place. The pin must be reinserted behind the collar (L/M-Style) or in the latch (H-Style) after closing the coupler.
Check that the hitch ball is fully seated in the coupler, the coupler is closed, the retaining pin is in place, channel hardware is tight, and all trailer lighting and safety chains are properly connected per SAE J684.
Perform maintenance at least annually: check welds and mounting bolt torque, grease the ball pocket, oil pivot points with SAE 30 wt. motor oil, and inspect retaining pins.
This indicates a problem with coupler operation. Check for signs of wear or damage to the coupler. If the coupler is deformed or damaged, replace the complete coupler and bracket. Do not attempt to use the coupler if operation is impaired in any way.
Do not tow. Ensure the hitch ball is fully seated in the coupler ball pocket before closing the coupler. Lower the trailer fully onto the hitch ball and visually confirm that the ball is completely seated. If the ball will not seat properly, check that you are using the correct ball size as indicated on the coupler body. If uncertain, contact Cequent Performance Products at 1-800-632-3290.
This indicates the coupler mechanism is not functioning properly. Check the ball pocket and mechanism for dirt, mud, or foreign material that may be preventing the collar from moving freely. Clean the ball pocket thoroughly. If the collar still does not spring properly after cleaning, the coupler may be damaged and should be replaced. Do not use the coupler if operation is impaired.
Tighten all channel hardware to the appropriate SAE proof load specifications: 3/8" bolts to 23 ft. lbs., 1/2" bolts to 55 ft. lbs., and 5/8" bolts to 110 ft. lbs. Use only grade 5 bolts. If hardware is bent, broken, or worn, replace it before using the coupler. Check channel hardware for wear and proper tightness at least annually.
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