Bulldog Gooseneck to 5th Wheel Trailer Coupler Adapter 25,000 lbs Convert Ball Fifth Wheel Hitch to Gooseneck Round Tube
Model: 0289580300KING PIN GOOSENECK COUPLER
• Allows gooseneck trailer to be towed with vehicles equipped with a fifth wheel hitch
• Feature dual set bolts
• Round model features exclusive load bearing pin
• Square model features exclusive load bearing pinch bolt
• Available with or without outer tube
| Part Number | 0289580300 |
| Brand | Bulldog |
| Capacity | 25,000 lbs. |
| Retracted Height | 23.3" |
| Extended Height | 31.3" |
| Range of Adjustment | 8" |
| Inner Tube Diameter | 4" |
| Outer Tube Diameter | 4.5" |
| Warranty | 5 Year |
| Installation Instructions |  |
About Bulldog
This part is a perfect choice for your Cattle horse Livestock and other trailers made by manufacturers like Big Tex Kaufman PJ ATC Gatormade Anderson Load Trail GN WITZCO Wells Cargo Barret Red Rhino Middlebury Elite Lark Snake River Load N Go and many more
$395 59
- Best Price on Web Guarantee
- Fastest Shipping
- FREE Shipping
- In Stock
We match lower prices from major authorized retailers for brand-new products in original packaging, provided the item is in stock. The competing seller must be an authorized, professional retail business; offers from
individuals, auctions, peer-to-peer sites, or unauthorized sellers don’t qualify. Used, refurbished, or open-box items are excluded.
Please see our full terms for details.
$395 59
Learn more
Questions? Call our Auto Experts at (877) 869-6690
Get it now, pay later
Select installments at checkout to split your purchase into 4 interest-free payments of $98.75 every 2 weeks.
- No fees, ever.
- No impact on your credit score.
Payment options are offered by Affirm and are subject to an eligibility check and might not be available in all states. CA Residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lender license.
Installments in partnership with
.
Affirm and its offerings are supported in English only. Translations are not provided by Affirm.
Product Details
- Brand: Bulldog
- Model: 0289580300
- UPC: 016118084948
- Includes: Gooseneck to 5th Wheel Coupler Adapter
Description
KING PIN GOOSENECK COUPLER
• Allows gooseneck trailer to be towed with vehicles equipped with a fifth wheel hitch
• Feature dual set bolts
• Round model features exclusive load bearing pin
• Square model features exclusive load bearing pinch bolt
• Available with or without outer tube
| Part Number | 0289580300 |
| Brand | Bulldog |
| Capacity | 25,000 lbs. |
| Retracted Height | 23.3" |
| Extended Height | 31.3" |
| Range of Adjustment | 8" |
| Inner Tube Diameter | 4" |
| Outer Tube Diameter | 4.5" |
| Warranty | 5 Year |
| Installation Instructions | |
About Bulldog
This part is a perfect choice for your Cattle horse Livestock and other trailers made by manufacturers like Big Tex Kaufman PJ ATC Gatormade Anderson Load Trail GN WITZCO Wells Cargo Barret Red Rhino Middlebury Elite Lark Snake River Load N Go and many more
Get Expert Help
Bulldog Gooseneck to 5th Wheel Trailer Coupler Adapter 25,000 lbs Convert Ball Fifth Wheel Hitch to Gooseneck Round Tube Install Notes
Installation and Maintenance Instructions for Gooseneck Coupler
Specifications:
- Rated according to SAE J2638 standards.
- Requires a 2 5/16” hitch ball rated equal to or greater than the coupler’s capacity.
- Maximum extension: 8 inches from the fully retracted position.
Tools Required:
- Torque wrench capable of 125 ft-lbs.
- AWS-certified welder (for welding tasks).
Safety Notes:
- Do not exceed the coupler, hitch, vehicle, ball, or trailer weight ratings, including the load.
- Never position any body part under the product or the load it supports.
- Secure the load, vehicle, and trailer by blocking wheels before latching or unlatching the coupler.
- Inspect all components for signs of wear or damage before towing.
- Replace bent, broken, or worn parts before use.
- Ensure the hitch ball is fully seated in the coupler ball pocket and the latch is closed.
- Use safety chains and ensure trailer lighting complies with regulations.
Installation Instructions:
Pre-Installation:
- Confirm no interference from the tow vehicle, tongue, ground, or mounted accessories during operation.
- Ensure set bolts face the towing vehicle.
- Gussets must extend as low as possible to support the outer tube.
- Avoid heat damage to the coupler during welding.
Welding:
- All welding must be performed by an AWS-certified welder.
- The outer tube must be rigidly attached to the trailer to support the rated load.
Post-Installation:
- Ensure the coupler remains vertical for proper operation.
- Confirm that the coupler operation has not been impaired.
- Apply included labels and remove pre-mask tape after painting.
Operating Instructions:
To Couple:
- Block trailer wheels.
- Align the hitch ball beneath the coupler.
- Set the locking pin in the open position.
- Lower the trailer onto the hitch ball and ensure it is fully seated.
- Slide the locking plate into the closed position.
- Set the locking pin to secure the coupler.
To Uncouple:
- Block trailer wheels.
- Set the locking pin in the open position.
- Raise the trailer from the hitch ball.
Maintenance:
- Perform the following annually:
- Check hardware torque (125 ft-lbs).
- Grease the ball pocket.
- Oil pivot points with SAE 30 wt. motor oil.
- Inspect retaining pin and replace if necessary.
Warranty Information:
- Three-Year Limited Warranty:
- Covers defects in materials and workmanship under normal use and service.
- Exclusions:
- Normal wear and tear.
- Damage due to misuse, overloading, or improper installation.
- For warranty information, please retain your purchase receipt and contact the manufacturer.
Additional Notes:
- Gussets must extend to within 3” of the bottom of the outer tube for rated load support.
- For high-load or rough-service applications, additional reinforcement and banding may be required.
- Replacement parts are available through authorized retailers.
For technical support and assistance, visit www.trailerjacks.com or call 877-869-6690.
Attention: This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information, please download the full installation PDF.
People Also Bought
