CURT 13570 Trailer Hitch Instruction Manual
- June 13, 2024
- Curt
Table of Contents
INSTALLATION MANUAL
13570
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.
Weight Carrying Capacity
| Gross trailer weight (GTW) | 3,500 lbs. |
|---|---|
| Tongue weight (TW) | 350 lbs. |
Parts List
| Item 1 | Qt | Description |
|---|---|---|
| 1 | 4 | Carriage bolt, 7/16” |
| 2 | 4 | Square-hole spacer, 7/16” x 0.88” x 2.25” |
| 3 | 4 | Serrated-flange nut, 7/16” |
| 4 | 2 | Flat washer, 7/16” |
| 5 | 2 | Fishwire, 7/16” |
Tools Required
| Ratchet | Flathead screwdriver or panel trim removal tool |
|---|---|
| Torque wrench | Exhaust hanger removal pliers |
| Socket extension, 8” | Aviation shears or hole saw |
| Sockets, 10mm, 17mm | Safety glasses |
- For a tools reference guide visit curtmfg.com/trailer-hitch-installation
WARNING
Never exceed the vehicle manufacturer’s recommended towing capacity.
Product Photo
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:
- Lowering of the exhaust
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
Step 1
Using an exhaust hanger removal tool, lower the exhaust by removing the two
rearmost rubber exhaust isolators from the frame mounted hangers (if dual
exhaust, repeat on both sides). Remove the exhaust hanger near rear
differential.
Note: Support the exhaust during installation to prevent damage. Spraying
lubricant may ease removal of the isolators
Step 2
Remove the four M6 x 1.0 muffler heat shield bolts using a 10mm socket and
remove the heat shield (if dual exhaust, repeat both sides). Cut a 1-1/2”
diameter hole in the heat shield(s), 2-3/4” behind the front-most mounting
hole to clear the mounting plate(s) in the area shown.
Step 3
Remove the three rubber plugs in each frame rail. Fishwire a 7/16” carriage
bolt (#1) and square hole spacer (#2) into the forward access hole in the
frame rail and pull into position. Repeat for the remaining three locations.
Leave fishwire attached.
Step 4
Using fishwire as a guide, raise the trailer hitch into position along with
the flat washers (#4) between the hitch and the frame on the rearmost mounting
holes. Center the hitch on the vehicle, remove fishwire, and loosely secure
the hitch to the vehicle with the provided 7/16” serrated-flange nuts
(#3).
Step 5
Torque all 7/16” hardware to 70 ft-lbs using a 17mm socket and torque wrench.
Reinstall the heat shield(s), raise the exhaust back into position and
reinstall the rubber isolators.
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
13570-INS-RA 06/14/2023
ECN10858
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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