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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

Kubota coolant
10/15/2018 in the HD/Fleet Forum
13 year old 50 hp Kubota tractor needs a coolant drain & cleaning. This unit has the old fashion green, tests "replace" with the strip. Does Kubota specify a long life coolant for the newer machines, and is it backward compatible for replacement in a 05 K...
GMC C7500 Park Brake
10/15/2018 in the HD/Fleet Forum
[Brakes: 09 GMC C7500 Topkick C7C042 7.8L] Hi Friends. Looking for advise here. In our fleet, we have this truck. Is Hydraulic Brakes. Isuzu Engine 6HK1. It only have a Manual Park Brake Lever Operated and Brake Drum and Shoes at the rear of the Allison ...
Peterbuilt 382 w/Cummins ISL Fan issue
10/13/2018 in the HD/Fleet Forum
I have an engine cooling fan issue. The fan stays locked up after start up. This fan defaults to lock up when there is no power to the fan solenoid. When I turn the key on/engine off the fan solenoid has power and the fan free wheels. As soon as the engin...
Brake squeal
10/12/2018 in the HD/Fleet Forum
[Brakes: 07 International 4300 7.6L] this truck has horrible front brake squeal, we have adjusted them tight and lose, replaced them with deal shoes and replaced all hardware and if you back up the noise is actually scares you when he hits the brakes, th...
Brake Warning Light Inop
10/09/2018 in the HD/Fleet Forum
[Brakes: 96 International 4700 7.6L] Looking for direction on this truck, the brake warning light is not working. For that matter there are no warning lights that illuminate on the dash, but the brake light is needed to pass its annual inspection. This i...

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