Hi I just purchased a new sa424 tlb this week and had a question. I have 6 hours on it and using the loader to dig into a pile of dirt or to peel up sod the tires have only spun once. I keep it in low and tried 4wd and just barely pushing the pedal and pushing it harder all it will do is sit there and whine or make worse noises. Driving a John Deere in the past it would spin the tires fairly easily once it couldn't dig anymore. Could the pressure be set to low? Sorry for the long winded question. Love the tractor was a great deal compared to orange or green near me. Thanks