Decided most likely a leak, based on the amount of fluid soaked up by the dirt/dust. We couldn't determine if it was leaking or poor maintenance. The entire rear end from the Hydro outlets and down to the hitch was covered with a caked black soot like stuff, which was most likely Hydro oil mixed with the dust from the fields soaking up the fluids. It hadn't been cleaned up at all, and most likely hadn't been since they bought it. I went back two more times to look it over, and took a high tech tractor mechanic with me. It was offered in a auction in central Illinois on July 16th. I want to thank everyone that responded to my questions concerning a New Holland 6610 tractor, and helping me identify the year and finding the serial number location, etc. ahvn't even started my 5000 / 10' mower but once this year.a nd that was to change the oil and service it. small patches are being hit by my 4600 and 950 with 6' and 5' mowers.
save for needing to charge the battery between uses, as now it can set for 4 months between starts due to no rain / grass / weeds to cut. very likely my least wrenched on tractor. prev owner ran it into a tree and bent the fender before he let it go back to the dealer still new and under warranty and traded for a slightly smaller tractor that was harder to run into trees in his orchard. but the button and horn were fine., replaced wireing harness ( i made mine ) for the fender lamp. a couple batteires now past the original one as mine is a 2000 model.and i think maybee 1 fuse. like fuel fitles and orings on the fuel line. On mine I've swapped a remote pack with a used one due to a defect in a pilot circuit. The -S models are for sure plain jane and economy. that would have been a huge 4dlt battery up there. on it's earlier cousings the 5xxx/7xxx at least to the 圆00 anyway. they have the space for a big truck battery, and at leas ton the 7610s. the only starting problems I ever have with it are battery related.