I have a 1995 Kamatsu excavator that wont shut off once its started?

I put a new ignition switch in it. Had just put a new starter in it. There is a electric motor that looks like a windshield wiper motor and gear box that runs the diesel on off, I am thinking. It used to go on and off (back and forth) now it doesnt move. So I can start it, it runs great but when I turn the key off everything quits working but the engine keeps running. If anybody has any ideas...........Thank you

Mike M is right.

there should be a intake shut-off for those diesels that are manual or electric ,try ,if not suffocate the engine by blocking the intake.

First get the battery terminal repaired. Even a healthful alternator won't be able to recharge a battery suitable with a nasty connection on the battery submit. Then, in case you're nevertheless purely getting 10-13 volts, you should interchange the alternator. 13.5 volts is totally the minimum for an alternator. And, once you goose the gas pedal, it is going to definitely bypass as a lot as fourteen.5-14.seventy 5 volts. also, are you leaving the vehicle operating with the A/C on and a intense watt stereo? because alternators purely placed out about 20-30 amps at idle. If the A/C is on and blower is on intense, that on my own can use 20 amps.

There's a solenoid on the fuel pump that is supposed to shut off the fuel when you turn the key off.It's usually not much. Go to the local dealership with the model and make and they'll be able to tell you for sure.They go out once in a while.It's nothing more than a little electro magnet just like a solenoid on a starter.

Start at the fuel cut of solenoid on the diesel fuel pump. When you turn the key to the off position it should kill the power to the solenoid, closing off the fuel to the cylinders. If there is still is power at the solenoid with the key off, then there is a problem at the ignition switch. If there is no power then the solenoid is stuck open and needs to be replaced. For some reason the cylinders are still getting fuel. All a diesel needs to keep running is fuel and air. Be sure to let me know how it goes. Good luck