CURT 31091 2-Inch Front Receiver Hitch Instruction Manual
- June 13, 2024
- Curt
Table of Contents
CURT 31091 2-Inch Front Receiver Hitch
INSTALLATION MANUAL
Level of Difficulty
Moderate
Installation difficulty levels are based on time and effort involved and
may vary depending on the installer’s level of expertise, the condition of the
vehicle, and proper tools and equipment.
Weight Carrying Capacity
- Gross trailer weight (GTW) 5,000 lbs.
- Tongue weight (TW) 500 lbs.
- Straight line pulls 9,000 lbs.
Parts List
| Item | Qty | Description |
|---|---|---|
| 1 | 2 | Serrated-flange nut, 1/2″ |
| 2 | 2 | Square hole spacer, 1/4″ x 1-1/2″ x 3″ |
| 3 | 2 | Round hole spacer, |
.188 x 1-1/2″ x 2″
4| 2| Fishwire, 1/2″
5| 2| Hex bolt, M12
6| 2| Carriage bolt, 1/2″
7| 2| Conical-toothed washer, 1/2″
Tools Required
- Ratchet Tape
- Socket, 18mm Pry bar
- Socket, 3/4″ Tape measure
- Boxed end wrench, 18mm Paint marker
- Socket extensions Reciprocating saw
- Torque wrench Safety glasses
- For a tools reference guide visit curtmfg.com/trailer-hitch-installation
WARNING
Never exceed the vehicle manufacturer’s recommended towing capacity.
NOTICE
Visit www.curtmfg.com for a full-color copy of this
instruction manual, as well as helpful videos, guides and much more! Before
you begin installation, read all instructions thoroughly. Proper tools will
improve the quality of installation and reduce the time required. This
installation requires:
- May require lower air dam trimming
- Fishwiring required
- Remove two factory tow hook bolts (one per side)
Periodic inspection of the trailer hitch should be performed to ensure all mounting hardware remains tight and structural components are secure. To help prevent damage to the product or vehicle, refer to the specified torque specifications when securing hardware during the installation process.
SAFETY INSTRUCTIONS
Safety glasses should be worn at all times while installing this product.
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
ASSEMBLY
Parts List
Item| Qty| Description
1| 2| Serrated-flange nut, 1/2″
2| 2| Square hole spacer, 1/4″ x 1-1/2″ x 3″
3| 2| Round hole spacer,
.188 x 1-1/2″ x 2″
4| 2| Fishwire, 1/2″
5| 2| Hex bolt, M12
6| 2| Carriage bolt, 1/2″
7| 2| Conical-toothed washer, 1/2″
WELDNUT CLEANING
To remove debris from weld nuts in the frame, spray lubricant or compressed
air into the hole. For heavy debris, use a wire brush. Take care not to damage
threads.
CONICAL TOOTHED WASHER ORIENTATION
FISHWIRE TECHNIQUE
Insert the coiled end of the fishwire tool through the hitch mounting hole in
the vehicle frame rail and out the access hole. Pass the coiled end of fishwire
through the spacer and thread bolt into the coil. Kink wire to keep the spacer
separate from the bolt as shown. Pull fishwire, spacer, and bolt through the
frame and out the mounting hole. Use fishwire to guide the hitch during
mounting and prevent loss of bolt or spacer inside the frame rail.
INSTALLATION
Step 1
Remove the existing M12 bolts with an 18mm socket and 18mm boxed wrench.
Remove the rearmost bolts and hex flange nuts securing the tow hooks and
return the bolts to the vehicle owner. Do not remove the forwardmost bolts
securing the tow hooks. Save the M12 flange for later.
Step 2
Use a small pry tool to remove the rearmost wire harness clip on the inside
of the frame on the driver side.
Step 3
Insert the coiled end of the fishwire through the existing hole in the
bottom of the frame and out of the end of the frame rail. Attach the 1/2”
carriage bolt (#6) and square hole spacer (#2). Pull the fishwire and
fasteners into position on both sides. Make sure the spacers are sitting flat
inside the frame and leave the fishwires attached.
Step 4
Tape the round hole spacer (#3) to the bottom of the frame with tape on
both sides of the vehicle. Fishwire the bolt through the round hole spacer. Be
sure that the spacers are flat against the bottom of the frame.
Step 5
Temporarily raise hitch into position and determine if trimming is needed
or desired. If needed, locate the center line of the vehicle and mark roughly
a 3-1/4” wide by 1” tall notch from the lower edge of the lower plastic
fascia. Use a reciprocating saw or cutoff wheel as needed to make the cut.
Step 6
Raise the hitch back into position with the fish wires inserted into the
lower mounting holes and slide the long M12 hex bolts (#5) and 1/2” conical-
toothed washers (#7) through the hitch and into the rear mounting holes of the
tow hook on each side. Loosely install the existing factory M12 flange nuts on
each bolt. Pull the 1/2” carriage bolts (#6) through the lower mounting holes,
remove the fish wire and loosely install the 1/2” serrated-flange nuts (#1).
Step 7
First, torque all 1/2″ fasteners to 110 ft-lbs. Next, torque all M12
fasteners to 79 ft-lbs.
Final Installed Image
TOWING BASICS & SAFETY INFORMATION
- For information on safely towing your trailer, visit curtmfg.com/understanding-towing.
- CURTMFG.COM
- PRODUCT SUPPORT: 877.287.8634
- 31091-INS-RA
- 01/13/2023
- ECN10430
References
- CURT: Trailer Hitches - Trailer Wiring - 5th Wheel - Gooseneck
- 8 Easy Steps - Trailer Hitch Installation How-To
- Towing Guide, How-tos, References & Glossary
- CURT: Trailer Hitches - Trailer Wiring - 5th Wheel - Gooseneck
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