Almost all our Mack trucks with the mp7 engine seem to experience a low oil pressure problem when pulling long grades.
The engine warning light will come on and the pressure gauge will read low oil pressure and not long after the engines will shut down.
This only happens going up a long fairly steep grade, but numerous of our trucks do this.
The upgrade tomthe engines for the oil pump idler gear or what ever upgrade required the back of these engines to come apart has done.
Anybody can give me a cure for this problem. Not a good thing when a fully loaded truck goes up hill and the engine dies.
Thanks in advance