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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

Vacuum Filling Combination Pressure/Overflow tanks (coolant)
12/11/2017 in the HD/Fleet Forum
Just out of curiosity. Anyone figure out a slick way to vacuum fill these, most commonly found on Freightliners? Doesn't matter if it's a Detroit, CAT, or Benz they seem to all have a very similar setup. You cannot fill through the pressure side, because ...
Code reader with Regen function?
12/09/2017 in the HD/Fleet Forum
Customer looking for an inexpensive HD code reader that also does regens. Thanks, for the help.
blower motor inop
12/07/2017 in the HD/Fleet Forum
[HVAC: 06 Freightliner M2 106 7.2L] I have several 2005,2006,2007 freightliner m2's with phantom blower motor problems. have 12v+- at large terminals at blower motor. small terminals which I believe are pwm fields are dead or missing fields. does anybody...
6.4 HP pump
12/07/2017 in the HD/Fleet Forum
[Driveability: 08 Ford F-350 Super Duty XL 6.4L] We have this high mileage 6.4 and we need help to decide whether to install a hipressure pump without replacing all the injectors. It codes p0087 (fuel rail/system pressure low), initially intermittently o...
ABS pump relay location
12/07/2017 in the HD/Fleet Forum
[Brakes: 06 International 4300 7.6L] Can anyone tell me where the ABS pump relay is located .Shows it in Wabco wiring diagram but can not locate it.I have codes for pump motor but I can cycle motor in when I apply 12 volts .I only get 9.5 volts when test...

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