How do you prime a Carrier ComfortPro APU

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 88 Alpha, Sep 1, 2015.

  1. Jooeugen

    Jooeugen Bobtail Member

    19
    2
    Mar 14, 2021
    0
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. REEFERman450

    REEFERman450 Light Load Member

    188
    62
    May 3, 2016
    0
    I know this is an old thread but what is the process to reprime this APU? At what point do you crack open that bolt? Is it done while the engine is cranking, before or after? Thanks reefer
     
  4. Jooeugen

    Jooeugen Bobtail Member

    19
    2
    Mar 14, 2021
    0
    It dose make sens. Tripac APU have a in line 12 v primer pump , something that I don t see on carrier. No wonder why they updated with 12 v in line electric pump. Myself I had same issue. First it got fixed by replaissing in line small fuel filter ..them it start shutting down after 2 days working and last time after about 5 min working. I replaced the big fuel filter (full with diesel) and the primer fuel pump ..and still just cranking. I made sure to crank and release the air also from the screw and the metal lines to. They (online) selling 12 v in line pump on Amazon and e Bay (can try same as for tripac apu), I'll try and see if it brings back the pressure needed for smoth run instead blowing air in the tank.
     
  5. Skiharleydoo

    Skiharleydoo Bobtail Member

    8
    2
    Jun 12, 2017
    Rockies
    0
    E9D4873A-F36A-4608-A88A-BC335286AA12.jpeg How I primed my carrierpro apu, I had to relocate my unit from the frame side to the catwalk, as in behind the sleeper between the framerails. When I disconnected my fuel lines it lost prime. After relocating it and reconnecting all the wiring and fuel lines it would not start. Tried starting through 9 cycles. Nothing.
    I got out my weed spray bottle with a hand pump, put fuel in it, Hooked it to my fuel supply line and opened the air bleed bolt on the apu then pumped fuel into the system, closed the bleeder, reconnected the supply line to the fuel tank. The motor started on first cycle, sputtered a bit
    And then ran fine.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  • Draft saved Draft deleted