Caterpillar 613C

3,105 hours, OROPs, 23.5 x 25 tires, Front tires 80%+, Rear tires 40%, Contractor says it runs great, Has been sitting for a while (winter a,nd bad weather) and batteries were too weak to start it, Brakes are not working, not sure why, Seat needs a bottom cushion, Sheet metal good, Sprockets good, Chains and flytes 50%, No leaks around engine, Cylinders dry, Leak at control valve (see photo), Only has front glass, Wiper gone, Some surface rust on floorboard of cab where paint worn off by operator, FOB: VIRGINIA, CALL FOR MORE INFORMATION