I have a 2009 Cat 277c MTL. Bought it 2 years ago used. It has started beeping inside the cab when moving in any direction and won't stop beeping when moving. It takes about 30 seconds of travel after startup before it starts beeping. No warning lights accompany the beeps. All the lights are on when turning the key. The seat and armrest switches seem to be working OK. Fluid levels and temps OK. The hour meter has a little flashing hour glass in it which I cannot find in the manual. There seems to be no explanation about the user safety features in the maintenance manual. Questions: 1. What is causing it, 2. How do I fix it? Can anyone help or direct me to a service manual that explains the beeper system?