Fulton 3" x 5" Bolt‑On Trailer Hinge Kit Fold‑Away Coupler 9,000 lbs Tongue Frame
Model: HDPB350101Fulton High Performance Series Fold-Away™ hinge kits are ideal for boat trailers that can be just a little too long to fit inside smaller garages. These high quality, precision engineered products provide options for solving this common problem.
FOLD-AWAY™ BOLT-ON HINGE KITS
- Converts standard trailer tongues into fold-away configurations while preserving the existing coupler
- Delivers strength at the pivot point with precisely machined heavy duty hinges made from die cast steel
- Easy to install bolt-on application with complete instruction manual
- Includes all mounting hardware
- Only recommended for trailers with steel tongue
- Application: 3" x 5" trailer tongue
- For use on trailers with material thickness between .188" and.120"
- Z-Max 600 hour clear zinc finish
- 9,000 lbs Capacity
- 5-Year warranty
Popular applications include canoe kayak Shorland'r Shorelander Karavan Boston Watercarft Whaler Dauntless Crownline Jet Ski and many many other non aluminum trailers
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Product Details
- Brand: Fulton
- Model: HDPB350101
- UPC: 783192023650
- Includes: 3" x 5" Bolt-On Trailer Hinge Kit
Description
Fulton High Performance Series Fold-Away™ hinge kits are ideal for boat trailers that can be just a little too long to fit inside smaller garages. These high quality, precision engineered products provide options for solving this common problem.
FOLD-AWAY™ BOLT-ON HINGE KITS
- Converts standard trailer tongues into fold-away configurations while preserving the existing coupler
- Delivers strength at the pivot point with precisely machined heavy duty hinges made from die cast steel
- Easy to install bolt-on application with complete instruction manual
- Includes all mounting hardware
- Only recommended for trailers with steel tongue
- Application: 3" x 5" trailer tongue
- For use on trailers with material thickness between .188" and.120"
- Z-Max 600 hour clear zinc finish
- 9,000 lbs Capacity
- 5-Year warranty
Popular applications include canoe kayak Shorland'r Shorelander Karavan Boston Watercarft Whaler Dauntless Crownline Jet Ski and many many other non aluminum trailers
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Fulton 3" x 5" Bolt-On Trailer Hinge Kit Fold-Away Coupler 9,000 lbs Tongue Frame Install Notes
Installation and Maintenance Instructions for Heavy Duty Fold-Away™ Coupler/Bracket Kit
Specifications:
- Compatible with steel trailer tongues:
- Dimensions: 2"x3", 3"x3", 3"x4", or 3"x5"
- Material thickness: 0.120"–0.188"
- Rated according to GTWR (Gross Trailer Weight Rating) and maximum pivot lengths.
- Welding must be performed by an AWS-certified welder.
Tools Required:
- 1/2” Drive Ratchet
- 15/16” Open-End Wrench & Socket
- 3/4” Open-End Wrench & Socket
- 7/16” Socket (for Torx bit)
- Metal Cutting Saw
- 1/2” Chuck Drill
- Drill Bits: 1/8”, 1/4”, 3/8”, & 1/2”
- Torque Wrench (Capable of 80 ft-lbs)
- Tape Measure
- Safety Glasses
- Gloves
- Center Punch
- Clamp
- Square
- Hammer
- Jack Stand
- Wheel Chocks
Safety Notes:
- Never exceed the rated capacity of the coupler, actuator, trailer, or pivot length.
- Safety chains must attach behind the castings on the trailer tongue, not to the coupler or swing tongue.
- Inspect swing tongue components for wear or damage before towing.
- Ensure wiring and brake lines are correctly routed to prevent pinching during operation.
- Properly secure all bolts, pins, and safety chains before towing.
Step-by-Step Instructions:
Preparation:
- Follow all safety precautions for tools being used.
- Support the trailer tongue with a jack stand behind the cut area.
- Remove all wiring and brake lines from the trailer tongue.
Measuring and Cutting:
- Measure the desired swing length from the coupler ball pocket and mark.
- Ensure the mark is at least 5" from obstructions.
- Cut the trailer tongue along the marked line. Remove sharp edges or burrs.
Safety Chain Installation:
- Drill 1/2” holes for safety chain bolts 4” from the cut end and 1” from the bottom.
- Attach chains with 1/2” bolts and locknuts, torqued to 45 ft-lbs.
Castings Installation (Bolt-On):
- Position the male casting on the trailer tongue and temporarily secure with a clamp.
- Drill holes in stages: 1/8”, 1/4”, 3/8”, and finally 1/2”.
- Attach casting with shoulder bolts and flange nuts. Torque to 75 ft-lbs.
Castings Installation (Weld-On):
- Weld the casting to the trailer tongue on all four sides with a 3/16” minimum fillet weld.
Final Assembly:
- Attach the swing tongue to the trailer tongue by mating the castings together.
- Apply grease to the pivot bolt and secure with a locknut torqued to 50 ft-lbs.
- Insert the hinge pin and secure with a hairpin cotter.
- Verify the swing tongue operation.
Wiring and Chain Rerouting:
- Route wiring through the swing tongue, avoiding sharp edges.
- Attach the coupler and torque bolts to 75 ft-lbs.
- Ensure safety chains are properly routed and do not bind or drag.
Maintenance:
- Inspect and maintain annually:
- Check welds and bolt torque.
- Grease pivot points and oil moving parts.
- Inspect safety chains and wiring for wear or damage.
Warranty Information:
- Limited Warranty:
- Bulldog and Fulton: 5 years.
- Other series: 1–3 years depending on the product line.
- Claims:
- Contact Cequent Trailer Products.
- Phone: 1-800-604-9466
- Address: 1050 Indianhead Dr., Mosinee, WI 54455
Additional Notes:
- Replacement parts are available through Cequent Trailer Products.
- Ensure all components comply with SAE J684 standards.
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