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FBGNO

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  1. Mack Pro, Thank you for responding, I'm sorry for the delayed response to you. I haven't been on since I last answered you, and I didn't know that you sent more correspondence. Please realize that I really do appreciate you taking the time to answer and help out with my problem. Here's what happened. I said that the truck has been doing this from new, it's been back to Mack at least 8 times for the problem, they kept telling me clogged filters, (bull$&%t). I started to think that it had something to do with the def system, so I asked the driver if the truck goes into regeneration often, he told me the truck only went into regen once since new. I thought that was strange. Last week he got back to the garag, at the end of the day, and while backing into the yard the truck started to regen, It went for 50 minutes, since that time the truck is running perfectly.
  2. Joey Mack, Thank you, I appreciate your response!!!!
  3. After I did the delete, Mack programed it. After putting more time into this, I'm starting to believe that it's something in the DEF department. Still working on it as It isn't a constant problem, it's more intermittent. Thank you all that have responded, it's appreciated. I'm an old dog in a new world, and I'm still feeling my way around all of this computer and electronics garbage.
  4. Mackpro, Thank you for the response, I've been busy and I never had a chance to get on the site to see if I had any replies. I remember doing the delete probably about a year ago, Mack sent me the part and we did it in house. I will have to check the flapper in the filter housing, as I don't think I've ever seen it. We drop the filter, clean the housing and install the new one. I will check that out. Thank You for your time and attention I appreciate it.
  5. Is there a fuel pressure sensor on a 2020 Granite GR64F with 425 MP7, that senses low fuel pressure and causes the truck to loose all power. This problem has been present since new. The check engine light comes on and the truck looses all power. Mack changes the fuel filter, resets the computer and says fuel filter was clogged. The truck runs well for three weeks with new filter then starts all over gain. We clear the computer and reset and the truck runs well, for anywhere from one day to three weeks, repeatedly after reset, without changing the fuel filters. We run beautiful clean fuel, I know the filters are not restricted, ten other trucks and ten other machines, running off of the same fuel, never have a problem, or have a fuel filter changed, for any other reason except a regularly scheduled service interval. Could there be a defective sensor that senses a very light normal restriction and it sets off some kind of fuel shut down?
  6. Can anyone tell me where Relay # 2MR2149M is used on a 2001 RD Mack with a 460 Engine
  7. What a beautiful looking truck. Fantastic Job well done!
  8. I was following the progress on a beautiful B75 mack tractor. The chassis was stretched and so was the nose and hood. I believe it had a 450 big cam cummins installed in it. I had the thread saved so I could go right to it to check the progress. Somehow I lost it and I can't seem to find it anywhere. The truck was a light purple and the guy was doing such a nice job with it. Does anyone know how I can find that project again. I believe it might have been a 57 B75.
  9. My 98 RD was doing exactly the same thing. I suspected it might be a liner. When I tore it apart it ended up being 2 of the liner seals were hard and crusty like bak o lite.
  10. We have always cut them out with the torch. Take your time , don't go crazy, light blast pressure and you'll be fine. Just wear your protection, the sparks and hot metal only have one way to go and that's right back at you.
  11. By any chance, did anyone ever check the harmonic balance wheel
  12. Thank you for that information, I'll check it out.
  13. On a 1996 CH600 with a 427, the red hose connection from the turbo to the charge air cooler, sucked out from the clamp and away from the the cooler mouth, where it was clamped. The first time it happened I found a broken clamp and didn't think anything about it, I just slipped the hose end on and installed a new clamp. The second time it happened, maybe the third time the truck was used after the repair, I figured maybe it wasn't tightened enough, but I decided to check the air intake filter and found it to be excessively dirty, so I changed it and I figured, that might have been the problem. Today I got called that the truck lost the hose again, under a load condition, pulling a hill on the interstate. The driver heard a loud pop and saw a billow of black smoke. He pulled off to the side of the highway and called. I went to the highway and found the same hose, either sucked in, or blown off, I'm not sure. Before reinstalling the hose, I checked the suction from intake manifold at the mouth of the charge air cooler where the red hose connects, thinking that maybe there was a restriction in the cooler, but the suction was so strong, it was enough to suck your hand into the cooler. I also checked from the air filter side and all was clear. I wanted to take off the hoses at the turbo to check if the impeller was okay, but the side of the interstate was not really the place to do that. I wanted to bring the truck back to the shop to investigate what's going on. I reconnected the hose and drove the truck back 20 miles to the shop, completely normal without any problems at all, it ran beautifully. I did, however notice that the filter minder gauge was at 8 and the air filter is brand new. Tomorrow I'll get into it and see what I can find. Has anybody had this problem before, or does anyone have any suggestions.
  14. Don't think that I'm crazy, but I had one driving me crazy, checked the pressure and pressure was low, changed the box great pressure, same exact problem, I disconnected the steering column and all was fine. The problem was the bearing on top of the housing for the double u-joints. The truck was a bear to steer, I changed that bearing and you could steer the truck with one finger. Now it is a must for any truck that comes into the shop for a service, that bearing gets oiled as part of the service.
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