Hey guys, Got a Scat Trak 2300D- I think I have a problem with the left side drive motor. After it gets warm the left side looses power and you start to hear a buzzing sound like the pressure relief valve is bad.everything else works great. It only has 1200 hours on it. I checked the pump relief valve pressure and its to spec. 5000 psi @ 2500 rpm, I checked it cold, don't know if that will make a difference. If it is the motor, Volvo wants 7000.00 for the part. I's an Eaton/Charlyn VIS 45 series. Are these decent motors or are they prone to early failure?