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air pressure issues.

Discussion in 'International Forum' started by madtrucker2014, Feb 14, 2015.

  1. Feb 14, 2015 #1
    madtrucker2014

    madtrucker2014 Bobtail Member

    5
    0
    Aug 14, 2014
    0
    so I gotta good deal on a 2001 International 9400 with a Detroit 60 12.7.......or so we thought. Me and my wife been trying to figure out wth is going on with our truck. When the truck runs, the pressure gauge is dropping about 30 psi in 15-45 seconds. The a/c isn't running and we are just having tons of issues. We checked the filter in the air dryer, and changed it. Not the issue, checked the lines, not the issue either. It went from not being able to hear the leak when parked and brakes applied to now we hear it and fixed that issue. My wife thinks its possible blockage in the air line, possible somewhere with the secondary tank. Any suggestions on this issue. We are just fed up.:biggrin_25512:
     
    madtrucker2014, Feb 14, 2015
    madtrucker2014, Feb 14, 2015
    #1
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  3. Feb 14, 2015 #2
    baha

    baha Road Train Member

    4,137
    2,834
    Jul 25, 2013
    ga
    0
    If you are able to get under your new truck with soap + water spray every thing till you find and fix leaks, ck,air bags in rear supp. pull or turn drains at end of tanks to ck. for equal press. in each tank?
     
    baha, Feb 14, 2015
    baha, Feb 14, 2015
    #2
  4. Feb 14, 2015 #3
    uncleal13

    uncleal13 Road Train Member

    3,756
    6,193
    Apr 9, 2009
    Humboldt, Sk
    0
    Hmm, maybe the signal line to the governor.
     
    uncleal13, Feb 14, 2015
    uncleal13, Feb 14, 2015
    #3
  5. Feb 15, 2015 #4
    Heavyd

    Heavyd Road Train Member

    7,625
    6,027
    Feb 4, 2009
    0
    Are you saying the pressure does not drop with the engine off? Probably fan clutch leaking.
     
    Heavyd, Feb 15, 2015
    Heavyd, Feb 15, 2015
    #4
  7. Mar 17, 2015 #5
    RustyBolt

    RustyBolt Road Train Member

    2,015
    3,166
    Feb 21, 2015
    Bement, IL
    0
    +1 if not leaking when shut off
     
    RustyBolt, Mar 17, 2015
    RustyBolt, Mar 17, 2015
    #5
  8. Mar 17, 2015 #6
    blr300

    blr300 Light Load Member

    76
    30
    Jan 5, 2014
    St. Thomas Ont. Canada
    0
    +1 signal line to gov...what uncleal13 said
     
    blr300, Mar 17, 2015
    blr300, Mar 17, 2015
    #6
  9. Mar 17, 2015 #7
    Mr.X

    Mr.X Heavy Load Member

    737
    596
    Oct 31, 2013
    Spokane, WA
    0
    Good idea! If there is a manual switch for the fan then turning fan on could isolate that problem, if it is a newer style fan that engages when pressure is released.

    ETA: could be related to the AC problem?
     
    Mr.X, Mar 17, 2015
    Mr.X, Mar 17, 2015
    #7
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