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Automotive HD/Fleet Forum

Professional automotive forum for discussion of heavy-duty trucks, buses and other on- and off-road equipment, and maintenance of automotive fleet vehicles. Discussion topics include fuels and lubricants, hydraulics, performance, on-board diagnostics, powertrain, power distribution, anti-lock braking and stability control systems, and best practices as they relate to heavy duty and fleet maintenance. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the HVAC Forum.

Recent Automotive Discussions in the Automotive HD/Fleet Forum

11/19/2019 in the HD/Fleet Forum
Can anybody out in the Detroit world send me the DDE-SVC-MAN-0127 A&I file? The A&I manual is included with a Detroit DDDL diagnostic software PSL subscription. To access, open the PSL program & go to Help > References. In the drop down box you'll see App...
More fun with regens
11/19/2019 in the HD/Fleet Forum
Have an 012 Thomas C-2 with a 6.7 ISB giving us a hard time with repetitive regens. We've gone through it pretty good, DOC / DPF are clean, pulled the intake did the EGR differential ports, cleaned the valve and all that. The DPF lamp is illuminated, the ...
Need schematic New Holland T4050
11/18/2019 in the HD/Fleet Forum
4wd farm tractor - Per the subject - Appears likely to be a power supply issue with both the instrument cluster and transmission TCM - engine starts and runs readily but won't move and the dash is dark with no datalink voltages at the DLC. DLC does have +...
belt squeal no belt?
11/14/2019 in the HD/Fleet Forum
[Engine: 14 Ford F-550 Super Duty XL 6.7L] This f-550 came in with a bad serp belt and idler pulley. however when moving it with the belt removed there is a very loud squeal from the engine with the serp belt on the bench? I cannot tell where it is comin...
2012 7400 will not crank
11/14/2019 in the HD/Fleet Forum
Can any one tell me or have a wiring diagram on a 2012 international 7400 starting system they brought it in because the marker lights where not working but now it will not start in the shop all it will not crank the breakers and fuses seem to be good any...

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