JSK37U Series Fifth Wheels Overview
The JSK37U series is JOST’s flagship line of cast ductile iron fifth wheels that is a standard specification option at every OEM. This series features the original locking mechanism that all other JOST fifth wheels are based on and sets the industry standard for fifth-wheel construction and functionality. Designed with safety and operator efficiency in mind, the features included in the JSK37U line are included in all other JOST fifth wheel products.
- Available with a cushion ring or steel wear ring
- Infinite adjustment
- 3-Point Locking System
- Anti-high coupling lugs
- Requires only 60lbs of force to open
- Can be rebuilt on truck in 30 minutes without removing the top plate
Key Features & Benefits
Replaceable Cushion Ring
JOST Locking Mechanism
Anti-High Coupling Lugs
Download the jost fifth wheel catalog
A comprehensive look into each of the JOST fifth wheel products.
Parts, Assemblies & Specs
JOST’s JSK37U Series is available in standard, air release, and low lube top plate options, all of which seamlessly pair with a range of mount styles to suit any commercial trucking application. The JSK37U series has a maximum vertical rating of 55,000 lbs and a maximum horizontal rating of 150,000 lbs.
All JSK37U Series options are available below:
Troubleshooting 37U Series
Additional Service Tools & Parts
Bracket Exchange Program
The JOST Bracket Exchange Program offers additional flexibility. JOST will send a new bracket to you, in return of your current bracket.
Please call Customer Service at 800-253-5105 to learn more.
Inspection & Maintenance Guidelines
Interested in jost fifth wheel products?
Use our dealer locator tool to find a certified parts dealer near you.
Looking for more information? Have a question about a product or part? Fill out the form to submit your request.
Claims should be filed with JOST or any authorized sales or service outlet within 60 days of product failure.
Have a question you’d like to talk to us about? We’re here to help. Just let us know what you’re looking for.