Auto 5th wheel jaw release help

Discussion in 'International Forum' started by earnies2, Mar 16, 2021.

  1. earnies2

    earnies2 Medium Load Member

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    I have a 2009 prostar with the incab 5th wheel release... I'm having issues that I can't figure out. The truck has not been used for 9 month's due to a motorcycle accident and then covid....I had the double fitting valve changed before the accident and haven't used it till now. That being said when I apply my parking brakes it unlocks the 5th wheel with air pressure....when I release my breaks the pressure goes away.... the electric switch sounds like its working but I'm stumped...
     
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    Release is surely just for the slide?
    Is the double fitting valve the the parking brake push pull valve assy? If so I would assume a line was crossed up in the dash.
     
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  4. earnies2

    earnies2 Medium Load Member

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    Release is for the 5th wheel jaws to release the trailer.
     
  5. BoxCarKidd

    BoxCarKidd Road Train Member

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    Never saw one of those on a road tractor just spotter trucks. Sounds like a bad idea.
     
  6. ChuckMartel

    ChuckMartel Light Load Member

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    Same.
    Was it factory installed?
     
  7. earnies2

    earnies2 Medium Load Member

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    Dedham, MA.
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    Yes factory installed all Werner some US express and England trucks have them. Its a nice option especially on a rainy, snowing or when you are in the mud. You still need to get out and remove your air lines and electrical cable but you don't need to pull your 5th wheel. You can only release it when the tractor brakes are applied so its safe.
     
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  8. Arctic_fox

    Arctic_fox Light Load Member

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    That 5th wheel release is actully getting to be pretty common. I know one company i worked for was installimg them on all new trucks as a standard option. Their great to avoid getting dirty reachimg under the trailer. And their great when they work.

    That said, try greaseing your jaws and ourgeing your airlines. Could be they are stiff with old grease that has been sitting almost a year. Otherwise no idea.
     
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  9. flood

    flood Road Train Member

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    why do you think it's a bad idea.....?
    I've had 10 trucks (2000-2015) with it.... love it
     
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  10. earnies2

    earnies2 Medium Load Member

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    Dedham, MA.
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    Its not the 5th wheel its somthing in the operation with the air pressure it shoulnt supply air without touching the switch.
     
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  11. supersnackbar

    supersnackbar Road Train Member

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    I had it on the '95 FLD I owned...and all of the company trucks where I work have it.

    PXL_20210317_133843415.jpg PXL_20210317_134022501.MP.jpg
     
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