Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

2011 Peterbilt 348 engine fan won't shut off.

Discussion in 'Peterbilt Forum' started by Lazer, May 12, 2022.

  1. May 12, 2022 #1
    Lazer

    Lazer Road Train Member

    1,390
    2,170
    Jan 22, 2017
    0
    2011 model year, PX-8 motor. Engine fan won’t shut off, on full time. Truck is a former BJ Services fleet truck. Have a hunch former owner rigged it somehow to have fan on full time. No noise from fan clutch when turning on ignition, even with full air. No air from fan solenoid on fire wall when pulling off air line to fan clutch, with engine running, and flipping fan switch in cab.
    TIA
     
    Lazer, May 12, 2022
    Lazer, May 12, 2022
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. May 12, 2022 #2
    baha

    baha Road Train Member

    4,137
    2,834
    Jul 25, 2013
    ga
    0
    Ck the switch to be sure it's not the problem and may be sending power to the fan at all positions? You can try to air up the air line going to fan hub and then ck fan for free wheeling?
     
    Last edited: May 12, 2022
    baha, May 12, 2022
    baha, May 12, 2022
    #2
  4. May 12, 2022 #3
    SmallPackage

    SmallPackage Road Train Member

    4,524
    13,618
    Dec 20, 2019
    Marion Texas
    0
    Is it an electronic viscous clutch? They never do stop turning or freewheel much and are pretty quite.

    Might be BJ put one on or modified the clutches in the air clutch to run full time and left the disabled plumbing and solenoids intact since those trucks just idle all day in the heat with the Ac blowing cold.
     
    SmallPackage, May 12, 2022
    SmallPackage, May 12, 2022
    #3
  5. May 12, 2022 #4
    Lazer

    Lazer Road Train Member

    1,390
    2,170
    Jan 22, 2017
    0
    Well, thats possible, but this one is not quite, it roars. Going down the road with the windows open, listening to the radio is a lost cause.
     
    Lazer, May 12, 2022
    Lazer, May 12, 2022
    #4
  7. May 12, 2022 #5
    SmallPackage

    SmallPackage Road Train Member

    4,524
    13,618
    Dec 20, 2019
    Marion Texas
    0
    What i meant by quite is the clutch itself. It is not really noticeable by sound when it kicks in fully. Doesn’t add extra sounds or make anything loader then it already is so to speak. Them plastic fan blades are noisy no matter what and I can relate to them driving one crazy running full speed all the time.
    The old school steel bladed air fans were nice. No noise from them. The only way to tell they kicked on was the temp gauge falling and a rush of heat thru the firewall. Lol.
     
    SmallPackage, May 12, 2022
    SmallPackage, May 12, 2022
    #5
  8. May 13, 2022 #6
    Lazer

    Lazer Road Train Member

    1,390
    2,170
    Jan 22, 2017
    0
    Had time this morning to disconnect the air line from the solenoid, and direct connect to the shop air. Evidently the fan clutch is locked up, could not free spin the fan with or without air pressure. Clutch made no noise when pressurized, or released.
     
    Lazer, May 13, 2022
    Lazer, May 13, 2022
    #6
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.