jost JSK 39 Installation And Operating Instrucitons

Fifth wheel couplings

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JSK 36 & JSK 37
JSK 36 & JSK 37
39
9
EN
EN
Installation and operating instructions
Installation and operating instructions

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Do you have a question about the JSK 39 and is the answer not in the manual?

Questions and answers

Leon E. Ball
April 29, 2025

Should the 5th wheel rockers be luricated

1 comments:
Mr. Anderson
May 15, 2025

No, the context does not mention lubricating the 5th wheel rockers of the Jost JSK 39. Therefore, no specific lubrication instructions are provided for them.

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Summary of Contents for jost JSK 39

  • Page 1 JSK 36 & JSK 37 JSK 36 & JSK 37 Installation and operating instructions Installation and operating instructions...
  • Page 2: Table Of Contents

    Fifth wheel coupling with manual lubrication.. 15 2 Safety information..........6.1.2 Fifth wheel coupling with central lubrication 2.1 Safety information for operation........ Trailer rubbing plate guideline- JOST connection (version Z)........16 2.2 Safety information for servicing......... recommendation..6.1.3 Low-maintenance fifth wheel coupling with 2.3 Safety information for installation......
  • Page 3: Explanation Of Symbols

    ATTENTION! Means that slight physical injury or material damage can occur if the relevant safety instructions are not followed. ADVICE! Contains additional important information. JSK 36 & JSK 37 MUB 002 004 M01 (REV-C) 04-2019 JOST IND (REV-A) 06-2019...
  • Page 4: Safety Information

    Safety information for servicing Only use the specified lubricants for servicing work. The servicing work should only be conducted by skilled per- sonnel. MUB 002 004 M01 (REV-C) 04-2019 JSK 36 & JSK 37 JSK 39 JOST IND (REV-A) 06-2019...
  • Page 5: Safety Information For Installation

    All welding on fifth wheel couplings and their parts is strictly prohib- ited and will render the type approval void. JSK 36 & JSK 37 MUB 002 004 M01 (REV-C) 04-2019 JOST IND (REV-A) 06-2019 JSK 39...
  • Page 6: Proper Usage

    Other applications which do not comply with the manufactur- mounting plates or with comparable licensed equipment. er's recommendations JOST fifth wheel couplings are suitable for use with power steering systems. ADVICE! Technical modifications reserved. The latest information can be found at www.jost-world.com...
  • Page 7: Design

    Proper usage Design JOST catalogue sheets and stamped on the type plate. This load da- ta is applicable for proper usage pursuant to regulation ECE R55-01. AIS-091-01. The fifth wheel coupling is designed in combination with the vehicle by the vehicle manufacturer (the design must comply with Regula- tion ECE R55-01, Annex 7).
  • Page 8 D value, or use a heavier fifth Test symbol and Fifth wheel posed D value wheel coupling. Alternatively, consult JOST. Type approval coupling load U [kN]...
  • Page 9: Operation

    Locking bar Locking bar Lock jaw Lock jaw King pin King pin Safety catch Safety catch latch latch JSK 36 & JSK 37 MUB 002 004 M01 (REV-B) 12/2018 JSK 39 JOST IND (REV-A) 06-2019 JSK 39 JOST IND (REV-A) 06-2019...
  • Page 10: Opening The Fifth Wheel Coupling

    When opening the fifth wheel coupling without a semi-trailer engaged, the fifth wheel coupling is to be opened as per Fig- ures G50/20 and G50/21. MUB 002 004 M01 (REV-C) 04-2019 JSK 36 & JSK 37 JSK 39 JOST IND (REV-A) 06-2019...
  • Page 11: Uncoupling A Semi-Trailer

    (for example a padlock) can be inserted G50/31 into the hole of the catch holder in the handle as shown. JSK 36 & JSK 37 MUB 002 004 M01 (REV-C) 04-2019 JSK 39 JOST IND (REV-A) 06-2019...
  • Page 12: Installation

    General installation instructions The bolt connections are therefore to be designed so that the pre- scribed tightening torque values or pre-stressing forces can be ap- To fasten the JOST fifth wheel coupling (pursuant to Regulation ECE Directive 94/ ISO3842 plied permanently.
  • Page 13: Assembling The Fifth Wheel Coupling On The Mounting Plate

    M16 x 1.5-8.8 or M20 x 1.5-8.8 10.9 10.9 10.9 12 Optional washer/disc spring G50/09 ADVICE! Tightening torques must absolutely be adhered to; see section 5.3 JSK 36 & JSK 37 MUB 002 004 M01 (REV-C) 04-2019 JSK 39 JOST IND (REV-A) 06-2019...
  • Page 14: Fastening Material And Tightening Torques

    The values shown above are guide values for a coefficient of friction µ tot. = 0.14. Further information is available in VDI 2230. MUB 002 004 M01 (REV-C) 04-2019 JSK 36 & JSK 37 JOST IND (REV-A) 06-2019 JSK 39...
  • Page 15: Servicing And Testing

    Max. 2 mm unevenness Grease the fifth wheel coupling plate, locking mechanism parts Adequate reinforcement must be assured and king pin with high-pressure grease (EP), JOST high-per- Smooth and groove-free surface if possible, without weld formance lubricant (article no. SKE 013 440 000).
  • Page 16: Connection (Version Z)

    Lightly grease the fifth wheel coupling plate, locking mecha- Check the top plate liners for signs of wear and damage (see The skid plate must cover the fifth wheel coupling’s nism parts and king pin with high-pressure grease (EP), JOST section 6.6). set-down surface in every position.
  • Page 17: 6.1.4 Grease Specification

    You can also install automatic lubricant dispensers. To prevent cor- rosion on the skid plate, we recommend that the skid plate is We recommend high-pressure grease (EP), e.g. JOST high-perfor- greased lightly during the above service intervals. mance lubricant (article no. SKE 013 440 000).
  • Page 18: Lubrication Instructions

    With the standard version (not the low-maintenance version), the centre area around the wearing ring (6) must be completely filled with grease (see marked area). Grease specification: We recommend JOST high-performance lubricant (article no. SKE 013 440 000). MUB 002 004 M01 (REV-C) 04-2019 JSK 36 &...
  • Page 19 (see section 4.3). G50/040 Swivel lock jaw (1) forward, e.g. with a large slotted screwdriver, until the locking bar (3) is free. G50/041 JSK 36 & JSK 37 MUB 002 004 M01 (REV-C) 04-2019 JSK 39 JOST IND (REV-A) 06-2019...
  • Page 20: Test Instructions

    To ensure the smooth running of the mechanisms When the wear limit on the king pin has been reached, it must be and repaired where necessary (see the appropriate JOST repair in- replaced. After the king pin has been replaced, the locking mecha- structions at www.jost-world.com).
  • Page 21: Adjusting The Locking Mechanism

    To ensure the smooth running of the mechanisms When the wear limit on the king pin has been reached, it must be and repaired where necessary (see the appropriate JOST repair in- JSK38/59 replaced. After the king pin has been replaced, the locking mecha- structions at www.jost-world.com).
  • Page 22: Wear Limit - Top Plate Liners

    To ensure the smooth running of the mechanisms When the wear limit on the king pin has been reached, it must be and repaired where necessary (see the appropriate JOST repair in- replaced. After the king pin has been replaced, the locking mecha- structions at www.jost-world.com).
  • Page 23: Wearing Ring, Lock Jaw ,Rubber Bush Wear Limit To Remove And Install Locking Mechanism To Remove And Install Pedestal, Rubber Bush & Swivel Pin

    To ensure the smooth running of the mechanisms When the wear limit on the king pin has been reached, it must be and repaired where necessary (see the appropriate JOST repair in- replaced. After the king pin has been replaced, the locking mecha- structions at www.jost-world.com).
  • Page 24: Locking Mechanism Wear Limit

    To ensure the smooth running of the mechanisms When the wear limit on the king pin has been reached, it must be and repaired where necessary (see the appropriate JOST repair in- replaced. After the king pin has been replaced, the locking mecha- structions at www.jost-world.com).
  • Page 25: Adjusting The Locking Mechanism

    If there is still excessive play, the wearing ring and the lock jaw must be replaced as described in the repair in- structions. JSK 36 & JSK 37 MUB 002 004 M01 (REV-C) 04-2019 JSK 39 JSK 39 JSK 39 25 JOST IND (REV-A) 06-2019...
  • Page 27 JOST, Germany, Tel. +49 6102 295-0, tkd-technik@jost-world.com, www.jost-world.com India, +91 (0) 657 6617500, sales-coordinator@jost-world.com, www.jost-world.com MUB 002 004 M01 (REV-C) 04-2019 • 4.0 JOST IND (REV-A) 06-2019 1000178 832108...

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