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  1. greasytshirt

    2012 Hino 268 P2047, 204F

    You want to know how it works. Let me find some pics of this thing. I appreciate the feedback. It's so much easier than cars.
  2. greasytshirt

    Mechanical 2012 hino 716 hybrid

    I think it'll last forever in those conditions.
  3. greasytshirt

    2012 Hino 268 P2047, 204F

    P0410 doesn't mean anything. It means that the air pressure in the tanks was low and it had to fill them up first before it could fire the burner to heat up the SCR. If you had hino dx in front of you, this is how you'd silence an SCR fault / limp mode: Go into the engine diagnostic menu, go...
  4. greasytshirt

    Regen problems

    Any engine with a history of EGR cooler failure is prone to regen and SCR efficiency problems. The ingredients in coolant can poison the DOC and SCR catalysts. There will be insufficient DPF heating if the DOC is poisoned, and the soot in the DPF will never completely burn off during a regen...
  5. greasytshirt

    Regen problems

    "Hey new guy, want some of the gas that came out of this truck?" Now it caused an employee problem.
  6. greasytshirt

    Regen problems

    The ones that run like crap are the ones with regen problems. If the engine uses oil, or has bad injectors, or has low compression, or has had no maintenance, the engine will emit more soot. This extra fuel in the DPF will either melt it when it overheats, or it will clog so bad the engine...
  7. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    Ask what codes are being pulled. The codes should be in the Pxxxx or Uxxxx format. The Aisin TCM is more robust, imo, than Allison TCMs. I doubt it's the TCM (but I'm not there to troubleshoot it either. The first thing to do is load test the batteries and clean all connections. A crappy...
  8. greasytshirt

    2012 Hino 268 P2047, 204F

    P2047 is a def injector malfunction. Def usage varies widely. I wouldn't worry about that part. Sent from my XT1585 using EO Forums mobile app
  9. greasytshirt

    2012 Hino 268 P2047, 204F

    And a burner fuel filter and crankcase ventilation filter. Fill the burner filter all the way with diesel before screwing it back on. Sent from my XT1585 using EO Forums mobile app
  10. greasytshirt

    2012 Hino 268 P2047, 204F

    Your def injector is crapped up. The dcu is seeing a "second order differential in the def injector circuit waveform". Replace the def injector and def filter. Do not force the clips on the def or coolant tubes. They are not available separately. Clean the area before messing with it. Use...
  11. greasytshirt

    2012 Hino 268 P2047, 204F

    It's rarely the pump. Gimme a few min. Sent from my XT1585 using EO Forums mobile app
  12. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    I'd look up specs for the cam and crank position sensors, and replace them if they're out of spec, on the edge of spec, or if they have thermal damage of any sort. Of course, this is all a guess because I'm not there in person. Sent from my XT1585 using EO Forums mobile app
  13. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    I'd start by locating the fuel pump relay and testing it. Maybe I'd put 12v into the wire going to the pump to see if it turns on, or to see if there's a break in the wiring or something. Then again, you've got more to check. I'd want to see if the ignition system worked when cranking it...
  14. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    It is much more likely that the engine will pump excess coolant into def tank than the other way around. Did they show you the injector cups they removed? Sent from my XT1585 using EO Forums mobile app
  15. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    Unless one is completely off the chart bad, replace them all. I've played the 'find the worst injector' game several times. You'll end up replacing them all after cooking another DPF. Sent from my XT1585 using EO Forums mobile app
  16. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    On the injector cups: Did someone put DEF in cooling system? DEF corrodes the copper in the injector cups very badly. This does happen somewhat frequently. A bad human error, the truck has no way of failure that will put DEF in the cooling system. BCU failure, in my experience, is very...
  17. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    I feel your pain. Gear wrench 3/8 drive, six inch allen driver with a ball end. They sell them in a set at advance auto for $30. Easiest thing I've found. If you start to strip one, stop. Get a long narrow punch. Put it on the side of the bolt head and pop it squarely with a 12-16 oz...
  18. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    Somewhere, someone is reading this and freaking out. Sent from my XT1585 using EO Forums mobile app
  19. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    1492-1508 is a fairly wide rpm delta. The theoretical maximum allowed is 25 rpm, but if this truck was under warranty I would have recommended their replacement. 17xx degrees is absolutely scorching hot. The ceramic the DPF is made of melts around 1485 or something. 1700 degrees is hot...
  20. greasytshirt

    Big Truck I work on Hino trucks. I'll answer any questions I know the answers to.

    And tighten the igniters to 20 lb/ft. I see them under torqued frequently. The gap between igniter tips is supposed to be between 2.5-3.5 mm. Sent from my XT1585 using EO Forums mobile app
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