CH613 Shutdown After 30 sec

[doubleh]

Hi everyone. Im new here. First, I want to thank everyone for all the help in the past. There is so much good info on here Ive never had to even register, Ive figured it out from everyones discussions.

My issue- I just picked up a 95 Mack CH613 E7-350HP has been sitting several yrs with bad clutch. New batteries got her fired up but it will run for approx 30 seconds and then shut down. Bump the key fires right back up with no hesistation. Can anyone help me? Just to tell all if it helps or not but the "electrical malfunction" light comes on, "brake pressure" comes on during that 30 sec. Also, air will not build ANY pressure, sounds like its leaking in steering column or possibly firewall, sounds more like its bypassing than an air leak because it wont build any psi and then power steering doesnt work at all during run time which probably has nothing to do with it but that it. Shut off and air might be two seperate issues but any help would be much appreciated. Thanks!!

[farmer52]

Does it shutdown with the engine at low idle? Have you tried running the engine at 1000-1200 rpm and see if it still shuts down? Could be computer is programmed to shutdown after 30 seconds at idle. Seems quick (30 seconds) but you need to check the computer shutdown setting.

BTW, welcome to BMT.

[2stacksuperdog]

Check fluid levels

[doubleh]

Fluids are all good. Yes itll shutdown at idle, or revving motor up any rpms, doesnt matter. Owner said it was running fine of course when it was shutdown & may have but he mentioned some "override switch" kinda acted like he may have had trouble in the past with that but never really said.

And thanks for the welcomes!!

Edited August 8, 2013 by doubleh

[turckster]

On vmac I and II, only 3 thing will cause the engine to shut down- oil psi, coolant temp and coolant level. These are programmable to be turned on/off. It would help to know the blink code of the active fault when the engine shuts down. To retrieve an active code- with the cruise switch in the off position and an active MIL light, push the cruise set/resume switch up until the MIL light goes out. The MIL light will flash a certain amount of times, pause and flash a certain amount of times again. This is the blink code. Repeat to see if there are any other faults since it will only show one fault at a time.

Make sure all fluids are ok and you have oil psi while cranking and running.