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.

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Recent Automotive Discussions in the Automotive HD/Fleet Forum

	Prentice 490 log skidder cold start system wire diagram 07/25/2024 in the HD/Fleet Forum I don't know what year this is. S/N SK15184. It has what looks to be a 12 valve 5.9 Cummins. I'm not able to read the engine data plate. Both cold start heater grid relays only have .04 volts to the control wire when cold start is activated. The heat grid...
	05 Dodge Cummins fuel in oil 07/22/2024 in the HD/Fleet Forum bought a used 05 dodge ram 5.9 diesel. Truck is fairly low mileage 105,000 and runs very well. it is getting fuel in the crankcase. It does take a couple revs for engine to start. I understand this may be a sign of leaking injector O-rings. I have replace...
	2011 F450 junk in the tank 07/22/2024 in the HD/Fleet Forum 2011 F450 6.7 diesel died on the highway and the driver cranked it until the starter died. So we towed it in to check it out. No codes cranks hard, batteries bad, starter shot. So replace starter and batteries canks won't run, pull both filters and take a...
	DIRT IN EVAP SYSTEM AND IN ENGINE 07/18/2024 in the HD/Fleet Forum I have posted on here many times, Tech at pipeline company with many Ford super duty trucks, always have problems with dirt in engine and evap system. We haven't had a lot of problems recently but getting worse again because of areas we are working in. Th...
	Long Shot Freightliner 07/17/2024 in the HD/Fleet Forum [Driveability: 01 Freightliner FLD112 FLD11242S 10.8L] Friend of mine's Freightliner. The gauge shows oil pressure but the warning light and buzzer are on. Is there a seperate sensor for the light and buzzer? No codes in ecm. I did try a new oil mpressur...

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