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DieselDog5.9

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Everything posted by DieselDog5.9

  1. Yes lots of oil, Got a few weeks till mud season shut down, If it has a wabco, does a wabco have to go back in? Wabco seems to build air slow on all macks, and super expensive.
  2. Compressor is worn out, I am hoping to make it to mud season before I pull the compressor. The gasket between block and compressor is also leaking pretty bad, hoping to upgrade compressor, havent done any research on that yet. I changed the Air Dryer and Governor last week so it would build air when cold. My fan is not air actuated, it is a viscus clutch like a car. Leak is constant.
  3. Hello all, Have a leak on the back side of what I think is the treadle valve, Blue arrow showing port leaking air, not sure what the purpose of this aditional valve is, but my experience with leaking valves is the issue is somewhere else and the leak shows up at the exhaust port. Could the leak be just the valve? Can this valve be ordered separate?
  4. I repaired a broken wire on the front left wheel, cleared the codes, ABS light still on, have a code, SYSTEM DIAGNOSTIC CODE #1 SID 151- FMI 14, the wheel sensor code cleared, so assuming it is an issue with the ABS module, I have the schematic, and have a few clerifying questions. What is the voltage supposed to be on the other side of the resistor feeding an Eaton abs module on pin #18? I have an ABS light on, inspection tomorrow, Pin #8 and #9 have 12 volts. 👍 Pin #18 on the ABS module, 0.87 volts, seems odd, this pin is feed from the fuse box to a resistor, before resistor 12V, after resistor 0.87V. Fail 😕
  5. Pictures please. Some guys are big on the V8, for me the parts availability would steer me clear, also dont these engines have to be driven carefully or they drop valves and such?
  6. As I understand it the 427 tune is for vocational trucks and is better than the 460 tune for highway trucks. I sent my ECM to an independant to reprogram to get the engine to pull under 1500 rpms, it is a whole different truck now. The dealers in the early 2000's had a "smoke tune" that would really make a 427 pull, that program is gone, and a 460 tune would require additional hardware from Mack for me to go from ai400 to 427/460 You guys in maine have a great dealership, we are recovering from loosing our local Mack Dealer.
  7. I carry a 5lbs sledge hammer, and a fitsall, metric and standard versions. Air hose, pressure guage and adapter to get air from trailer glad hand.
  8. Yes, the owner has had fantom light issues for multiple years, all set now. What an odd spot to hang a stop light switch.
  9. I Did find it, had fallen down on the intake manifold and shorted out.
  10. Have a 99 Mack RD686S that the stop lamp circuit has a mind of its own, looking for the stop lamp switch, but have found 4 switches in the air circuit, but not sure what is what.
  11. There are numerous paramaters in the program that can be turned on or off. One of those is road speed, if the road speed is limited to 63mph, you are not going to pull full rpms out of the engine in top gear. I went to the mack garage and they turned off the torque limiting when on the low side of the transmission, and the speed limit of 63mph. The worst part of that 400 is the rpm range, it falls on its face at 1500rpm, but mine is a 2003 so maybe it is different. But I found a cure for that also.
  12. Truck ran into the shop just fine, Changed the exhaust manifold and radiator now a miss, this all came before I touched the injectors. There is a specification of 14.34mm between the top of the cylinder head and the top of the injector when installing the injector but before putting the caps on, this is a check to make sure there are not double washers. After changing the injectors ran fine. It was before the injector change that it had a miss.
  13. I have seen this setup in single axle plow trucks, the little peanuts come out and lock against the outer plate, but I did not think it was selectable, thought it acted as a locker/posi works in a car differential. Any Mack I have seen with "quad locks" has hendrickson suspension and Rockwell or Eaton rears.
  14. Cracking injectors it acted like combustion was backfeeding through the injector line. 2 injectors and we are back in buisness.
  15. I had run the truck for a while, longer than it should have taken, we were cracking injectors looking for cylinder contribution, and fuel started dripping out of the turbo exhaust. 😬 I had thought about swapping the eup's, was concerned about damaging the O-rings. Unfortunatly the truck really needs to run Monday, I have aranged a hired truck for monday if I need it. I had a spare set of injectors from an AI400 that went to the Mack Garage and was turned up to 460 when it was new, I swapped the injector in Cylinder no 4, runs alot better, cylinder is coming up to temp, still have a miss, cracking the injectors Cyl 4 has engine droop 5 does not and has a ton of air, almost like it is being pushed back past the injector. I will be tearing into it again, swapping 5,6 injectors with the spare ones I have.
  16. Catching up on some maintenance, changed the exhaust manifold gaskets due to a leak, replaced the radiator, belt tensioner and belt. As part of this process had to remove the fuel jumper lines from the unit injectors to the cylinder head, immediatly put plastic covers on the unit injectors. Job went fairly smoothly however primined the fuel system, and got the truck to fire, definitly missing on No4, we cracked the line, checked the wires, no4 manifold cold, crack the line and no engine droop, definitly have a miss. I have done this job on multiple other trucks and they fire up and eventually work the air out. This spring I changed the fuel pressure regulator and took a few minutes for it to clear out. So not sure if I have an issue, with the unit injector or just need to let the truck run longer and work the air out.
  17. My 03 Granite with an AI 400 has a thermostatic fan clutch not an air clutch. The thermostatic fan clutch is just like a car fan clutch it has an internal mechanism that locks up the fan when it gets warm, so there is no external control that you can tie into were the air fan clutch takes the temperature of the coolant remotely and turns the fan on and off with air, and that system you could tap into electronicly.
  18. I have only done this job when removing the back box of the transmission to repair the Hi/Lo clutch. If I recall we jacked up the cab and removed the air bags so cab could be lifted higher, but watch the firewall of the cab hitting the back of the engine.
  19. So my experience is with the 18 speed transmissions, but assuming they have similarities, front box has 6 gears, rear box has high low split and reverse. In my opinion you have an o-ring that is cracked and allowing air into the case, now in the 18 speed the rear piston is for high low, and can be replaced externally. The reverse piston I think is on top of the transmission.
  20. I was assuming also that it was the overdrive version. 5th being direct? From the conversation the Owner and I had noisy all the time, hi or low side.
  21. So we pulled a 6 speed out and put a 12 speed in 3-4 years ago. The hired driver, (nice guy, just young and inexperienced) had to drive the old R model while the Granite was out of commission for a few days........ Well now 4th gear is noisy in high or low, so thoughts? I think there are 2 versions of this 12 speed, one for off highway trucks a little lower geared and a highway version, we have the highway version.
  22. Is the T310M the ten speed with selectable reverse, similar to an old twelve speed? 5 reverse gears, yellow selector lever?
  23. Just got a quote from Mack for 2 new rails. 26k not installed. Our frame is not awful rusted but the spread is bad. 3/4 inch. Cannot just get a whole frame rail from supplier because an R model frame is "Fashioned" in the front and they do not do that only straight frames. Guess I am looking at 2 options: Cutting the outer frame off, sand blasting and putting back together and welding. Reading here I see some have done this but couple of questions. Where is a good spot under the cab to cut that you can get under there and weld back together. Will the frame come back together as it is spread pretty far apart from original. 2. Pull the inner frame rails out Lots more work but no welded joint Will the frames come back together What is going to be a complete SOB when pulling the inner rails out? Would love some more pictures of some others experiences with this repair.
  24. I had a friend put a marine engine in a superliner, had to come up with some jakes and rework the pump for variable speed governor.
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