my case 430 skid steer loader worked fine then just quit.

my case 2006 430 skid steer loader worked fine then just quit. No noise...nothing...just quit. The seat buzzer works, the lights work, the buzzer sounds when you turn the key on but the engine just turns over not firing has only 1500 hrs :Banghead

thank you

my case 430 skid steer loader worked fine then just quit.