EGR cooler cores on a Maxxforce 13, low temp for plugging (low flow) and the high temp for coolant consumption. Using the new tool is sure better than the old way of pulling the whole assembly for tear down.
Exhaust manifold on that same truck, this one has seen better days...
Pulled the trans in this Superduty for a clutch, once out on the ground what caught my attention wasn't the various broken clutch pieces floating around in the bell housing but the input shaft. The pilot bearing was completely gone at about 200K miles.
Pulled the injection pump on a 5.9 24 valve, the customer (FedEx) diagnosed and supplied the new pump. Well, they were wrong. Truck is still in the shop waiting for approval to continue on it I think.
I needed a precision measuring instrument recently.
This the clutch brake or low capacity inertia brake (LCIB) as Eaton calls it that they are using on Ultrashift + transmissions.
This was an intermittent power derate on a Cummins powered T300. Wire harness shorted to a fuel injection line.
Intermittent electrical problem with the amber warning lights and radio in this school bus, found a sticking relay. You can see evidence of water intrusion, I suspect this is not the only problem this will have as a result.
We were slow for awhile so I fab'd up a bracket to hold my creeper and air hose.
This is the result of a preset hub not setup correctly. 350 ft-lb spec and could be disassembled by hand. You can see the sheer amount of wear in the second picture. I measured an 1/8" gap between the roller and inner race holding it in that position. Pulled the diff to clean and inspect, rolling it over by hand revealed the faint sound of roller bearings hitting each other. It had spun the inner pinion bearing and it was so worn the rollers would fall into each other as they came up over the top.
This last Saturday I diagnosed a failed upstream NOX sensor on a Paccar MX, apparently there have been some problems, part number supersedes 3 times and the updated sensor is 4x the cost of the original. There is also software calibration that is supposed to fix NOX faults but as I found it only changes the fault from a P3805 to 3954 and 3958. Ran a regen to get the exhaust temp up enough for the NOX sensors to come online and the upstream sensor value was 0, downstream at ~14. Read through the 2 steps in troubleshooting (step 1 is check for fault codes, step 2 is also check for fault codes). Changed the sensor out and ran the regen again, upstream reading ~188.
