JSK37UB SERIES FIFTH WHEELS 

Built for Tough Enviroments
The steel wear ring is designed for environments that are hard on the throat of the fifth wheel. Made with alloy steel hardened to 262 - 321 BHN. This will provide lasting performance, keeping your fifth wheel on the road longer.
Convenience
The steel wear ring is replaceable and can be quickly changed when it gets worn. It can also be used in place of the standard cushion ring on your JOST fifth wheel.

  • 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

If you don't see your part number check the links below or contact sales.

JSK37uB
Steel Ring
37USK_33
37FSL.88
UB conversion

JSK3CN LIGHTWEIGHT FIFTH WHEEL

The JSK3CNWL is one of the lightest on highway fifth wheels on the market without the cost of aluminum. This model features a fusion welded steel top plate that incorporates a carbon fiber beam. Other key features include:

  • Same proven locking mechanism
  • Convertible to a standard lubricated fifth wheel
  • Same surface area as JSK37UW low lube fifth wheels
  • Replaceable steel wear ring
  • Compatible with all JOST brackets
JSK3CN LIGHTWEIGHT FIFTH WHEEL
JSK3CN LIGHTWEIGHT FIFTH WHEEL
JSK3CN LIGHTWEIGHT FIFTH WHEEL

LOC-LIGHT SENSOR

The dual-sensor system on the JOST JSK37UBE is connected to the Go/No-Go indicator light located next to the handle. A proper coupling with the handle and kingpin in the locked position will be lit up as green or “Go light”. If the system does not detect the handle and/or kingpin in the proper locked position, the light will flash red or “No-Go light”

  • Green/Red/White Indicator Light with audible alert.
  • Throat illumination light for superior lock bar visibility (Sold Separately).
  • Easy field installation and replacement.
Loc-Light Flyer
LOC-LIGHT SENSOR

Comes with JOST’s Hardened Steel Wear Ring for maximum performance and durability.

SEE THE LOC-LIGHT SENSOR IN ACTION

Download the jost fifth wheel catalog

A comprehensive look into each of the JOST fifth wheel products.

Download Catalog
Download Catalog
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
Download Guide
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Request Info

Looking for more information? Have a question about a product or part? Fill out the form to submit your request.

Request Form
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Warranty Statements

Claims should be filed with JOST or any authorized sales or service outlet within 60 days of product failure.

Jost Warranty

Support Help

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.

Contact Sales