Forum Discussion
wolfe10
Jun 20, 2015Explorer
Klueck wrote:
This is a good question, as we have wondered the same thing. Our issue is when we use the EB, we slow down but the rpm's get too high when and we have to use the foot brake. This happens going down hills.
Do not guess whether the RPM's are too high.
There are several numbers you need to get from your engine manufacturer (call them with your engine serial number):
Peak torque RPM-- do not operate below this except at very light throttle settings.
Peak HP RPM-- just what it says.
Governed RPM-- the RPM at which the engine's fuel system will reduce fuel to keep RPM from going higher.
And, the one of interest for your question:
Maximum no-load RPM-- how fast may the engine turn while coasting/descending a grade.
While you can "get away" with just using the service brakes when coming to a stop, you will BURN THEM UP were you to use them on a long downgrade.
The service brakes should only be used on a long downgrade to allow you to slow down enough to shift to a lower gear. The exhaust, engine compression brake or properly functioning variable vane turbo is essential to safe mountain driving with a heavy vehicle.
About Motorhome Group
38,706 PostsLatest Activity: Jan 31, 2025