CURTMFG GOOSENECK Connect Fifth Wheel Gooseneck Pin Box User Manual
NOTICE BEFORE PURCHASE/INSTALLATION
Purchase verification required. See instructions below for pin weight measuring process.
Returns will not be accepted once product has been installed.
Purchase Verification
The CURT® Helux “Gooseneck” Pin Box is offered in different pin weight ratings. To accurately order the Gooseneck that supports the weight of your 5th wheel, you will need to know the pin weight. The best way to attain the pin weight is to take your 5th wheel to a certifed scale, i.e. CAT Scale.
For additional information, visit https://catscale.com/how-to-weigh/.
Note: Be sure your 5th wheel is fully loaded with everything you would normally have when travelling or camping including ATVs, golf cart, motorcycles, snowmobiles, etc.
- Connect the 5th wheel to the tow vehicle and drive onto the scale; front axle on Scale 1, rear axle on Scale 2 and the trailer axles on Scale 3.
- Note these weights and total the weights from #1 and #2.
- Disconnect the 5th wheel and reweigh just the tow vehicle on scales #1 and #2.
- Note these weights and total the weights from #1 and #2.
- Subtract the weight total in step 4 from the weight total in step 2 to find the actual hitch weight.
Pin weight can also be approximated by multiplying the GVWR of the 5th wheel by 22% (0.22). This weight result will provide you with approximate pin weight to match with the chart below. Depending on actual trailer weight and load distribution, approximate weight could vary from actual weight. For best results, getting the actual weight is preferred.
Weight Carrying Capacity – Curt Helux Gooseneck Pin Box Kits
Pin Weight Calculated, see Purchase Verification
- Optimal pin weight value range when choosing a Curt Helux Gooseneck Pin Box.
- Unloaded – No cargo and empty fresh, black, and gray water tanks.
- Loaded – Cargo loaded including toy hauler area, tanks travel-ready.
Note: The Gooseneck models are determined by the weight rating of the spring used between the upper and lower jaws.
Product Photo
Level of Difficulty
Moderate
Installation difficulty levels are based on time and effort involved and may vary depending on the installer level of expertise, condition of the vehicle, and proper tools and equipment.
Tools Required
ASSEMBLY
Parts List
SAFETY INSTRUCTIONS
Safety glasses should be worn at all times while installing this product.
WARNING
Never exceed the vehicle manufacturer’s recommended towing capacity.
NOTICE
Before you begin installation, read all instructions thoroughly.
Proper tools will improve the quality of installation and reduce the time required.
This installation requires: Two or three people to help support the weight of the pin box as it is being lifted.
To help prevent damage to the product or vehicle, refer to the torque requirements when securing hardware during the installation process.
Product Registration and Warranty
CURT stands behind our products with industry-leading warranties.
To get copies of the product warranties, register your purchase or provide feedback, visit: warranty.curtgroup.com/surveys
INSTALLATION
WARNING
An unsupported pin box during product removal can result in death, serious personal injury, severe product and/or property damage. Properly support Gooseneck throughout installation.
NOTICE
The pin box assembly weighs several hundred pounds. Installation and removal of pin boxes requires a minumum of two people. A forklift may be used to lift the Gooseneck into position.
The 5th wheel should always be towed while level. Adjustment of the Gooseneck mounting height, the tow vehicle height or suspension may be necessary to accomplish a level towing condition.
Step 1
Level the trailer front-to-back using the landing gear.
Remove the fasteners securing the old pin box and carefully lower it from the mounting bracket and move it from the area.
WARNING
Be sure to properly support pin box before removing mounting bolts.
Step 2
Back the tow vehicle under the 5th wheel’s upper deck.
Measure from the collar of the hitch pin up to the first set of hole(s), on center, in the uppder deck mounting brackets. Note the dimension (A).
Pull the tow vehicle away from the 5th wheel before installing the Gooseneck.
Lift the new Gooseneck and support it while positioning it at the appropriate height.
Mount the Gooseneck in the set of mounting holes that most closely keeps the 5th wheel level.
Note: The Gooseneck kit includes new mounting hardware. Do not reuse the mounting hardware from the previous pin box.
Step 3
Once the Gooseneck is appropriately positioned, secure it with the supplied hardware kit.
Torque mounting bolts bolts to 120 ft-lb±5 ft. lb.
Note: The CAUTION label provides instructions for the coupler lock.
HITCHING
WARNING
Failure to follow hitching instructions may result in death or serious injury.
NOTICE
Note: Be sure to consult your hitch manufacturer’s owner’s manual for proper hitching procedure.
Step 1
Place chocks firmly against the front and rear of each trailer tire to prevent movement, either forward or backward. If necessary, lower the tow vehicle’s tailgate to allow the Gooseneck to clear. Note: The clearance of the lowered tailgate to the trailer needs to be monitored during hookups, since some combinations of truck and trailer have little or no clearance.
Step 2
Measuring for Gooseneck clearance:
A. With the tailgate down, measure from the ground to the bed of the tailgate.
B. Measure from the truck bed to the top of the hitch pin.
C. Add A and B together to find C.
D. The measurement to the bottom of the coupler must be 2″.
WARNING these instructions may result in the Gooseneck being too high and coming to rest on top of hitch pin or not completely inside Gooseneck receiver. This could result in the trailer separating from the hitch which may result in death or serious injury.
WARNING to hitch the trailer by using trailer jacks to lower the trailer and kingpin. This could result in the kingpin coming to rest on top of the skid plate instead of within the hitch opening, which may result in death or serious injury.
Step 3
Back the truck slowly toward the trailer and position the coupler directly over the hitch ball.
Lower the RV onto ball.
The coupler will automatically latch when lowered onto the ball.
Note: Be sure to connect the safety chains to the truck bed anchors.
WARNING
Verify the hitch lock is in the locked position (Fig. 7). If the lock is in the unlocked position (Fig. 6), the procedure may result in severe property damage, serious personal injury or death.
Failure to secure the tow vehicle and trailer from movement during procedure could result in severe property damage, serious personal injury or death.
UNHITCHING
Step 1
Park the 5th Wheel into it’s destination.
Chock the tires firmly, front and rear.
Step 2
Disengage the Gooseneck coupler by pulling the cable release toward the rear, locking it into the cable stop.
Step 3
Extend the landing gear to lift the front of the 5th Wheel until the Gooseneck clears the hitch pin.
Step 4
Pull the tow vehicle clear of the 5th Wheel and level the RV.
TROUBLESHOOTING & MAINTENANCE
CURTMFG.COM · PRODUCT SUPPORT: 432.547.7378 · GOOSE-AM-PB · 05/30/25 · CCD-0010079
Documents / Resources
 |
CURTMFG GOOSENECK Connect Fifth Wheel Gooseneck Pin Box [pdf] User Manual 2024044575, 2024044574, 2024044576, 2024044577, 2024044578, 2024044579, GOOSENECK Connect Fifth Wheel Gooseneck Pin Box, GOOSENECK, Connect Fifth Wheel Gooseneck Pin Box, Fifth Wheel Gooseneck Pin Box, Gooseneck Pin Box, Pin Box, Box |