Fifth wheel couplings and
mounting plates



Mounting and Operating Instructions
FlashTronic 07/2021
JSK - first greasing 08/2020
JSK 26 D 05/2020
JSK 34 Mounting and operating instructions 07/2021
JSK 36 / 37 03/2021
JSK 37 - check list 08/2010
JSK 37 ER 05/2004
JSK 38 / 50 04/2020
JSK 40 / 42 08/2008
JSK 40 / 42 Mounting and Operating Instructions 09/2023
JSK 40/42 Connecting / Disconnecting 04/2017
JSK 42 K7 06/2013
LubeTronic 1Point mounting and operating instruction 10/2015
LubeTronic 5Point Mounting and operating instructions 07/2020
SKS Sensor coupling system 01/2022
Sensor JSK 07/2020
Repair kits
JSK 26 D 07/2013
JSK 36 D 03/2011
JSK 37 06/2007
JSK 37 04/2012
JSK 37 C Cabel guard plate JSK 37 C - Sensor 08/2013
JSK 37 C Exchanging locking mechanism sensor JSK37C 07/2013
JSK 38/50 Repair Manual 11/2018
JSK 40 / 42 06/2012
LubeTronic 5Point Testing Instructions Standard 02/2017
LubeTronic 5Point Repair Manual 05/2024
Replacing the sensor set JSK34/ JSK36/ JSK 37C/ JSK 40/ JSK 42 08/2023
JOST High-performance-lubricant Bio 03/2019
JOST High-performance-lubricant Bio 08/2021
JSK 37CW / JSK 42W Now standard with LubeTronic 09/2016
JSK 52 Heavy Duty fifth wheel coupling 07/2013
LubeTronic 1Point 08/2021
LubeTronic 5Point The central lubrication system for fifth wheel couplings 01/2021
Repairkits Original spare parts 10/2021
SKS Sensor coupling system 09/2016
SKS Sensor-Coupling-System with remote display 08/2021
Safety and convenience Sensoric + LubeTronic 09/2016

Fifth wheel couplings and mounting plates

JOST submitted the patent application for the first cast steel fifth wheel coupling almost 60 years ago. Since then, JOST’s fifth wheel couplings have been a success story around the world. All renowned vehicle manufacturers put their trust in JOST’s expertise and performance.

The extensive product range and high quality are just as crucial for the customer’s trust as the company’s innovative skill and reliable global supply of finished and spare parts.

JOST provides fifth wheel couplings for any application. This includes weight-optimised pressed metal and robust cast steel couplings for imposed loads between 6 and 74 tonnes. Almost all variants are available with a large selection of pedestals in all common heights and with all common hole patterns for plate and frame assembly. Depending on the model and height, it is possible to reduce the weight by up to 100 kg. Different sensory variants that build on one another guarantee secure operation under all conditions, while the automatic lubrication solutions brought together in the LubeTronic product family save time and money.


Design / features

JOST’s range includes the perfect fifth wheel coupling with the required imposed load for a wide range of applications – from lightweight distribution traffic to normal road transport; from site traffic to heavy duty transport.

Excellent quality

  • Patented and reliable design
  • High-quality casting
  • Certification in accordance with ISO/TS 16949
  • Excellent corrosion protection

Wide range of products

  • Couplings for imposed loads of 6–74 tonnes
  • Pressed metal or cast couplings
  • Various bearings and mounting heights
  • Weight-optimised frame assembly possible
  • Low-maintenance variants
  • System solutions such as Sensoric and LubeTronic available for all common fifth wheel couplings

    Verified safety

    • High level of operating reliability
    • Regular inspections during series production in accordance with ECE R55
    • Can be used in complicated loading conditions
    • Automatic latch arrangement
    • Only a visual inspection is required to ensure proper engagement
    • Protection against unauthorised opening is possible using a padlock
    • Various sensory solutions available
    • Optionally with JOST King Pin Finder for visual coupling assistance

      High operating comfort

      • Long, easy-reach handle
      • The operator does not get dirty
      • The latch is released using a cable
      • Optional: One-handed operation with or without latch

        Customer-oriented service

        • Global site and dealer network
        • Expert individual support by sales and customer services
        • Customer support during the planning phase based on CAD data
        • Extensive distribution and global supply of spare parts

          Very easy maintenance

          • Stageless adjustment of the locking mechanism, resulting in lower wear
          • Easily replaceable top plate liners
          • LubeTronic solutions available for easier lubrication
          • All wearing parts available in practical spare parts kits
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