Good tractors. 86 pto hp. 268 cuin Ford engine. Could have the syncronized or non syncronized trans in it. With or without dual power (direct or underdrive wet disc clutch) activated by floor push switch. Can have a optional second hydraulic pump on the left rear of engine. If it has it you will see the pump and a screw on filter easy enough. This nearly doubles the flow out the remote valves. Cabs are decent, quite, just not as much glass as newer models.

We have an early 7710 with about 7000 hours on it and 2 new style cab 6610, 5610 tractors.

One common thing on high hour machines is oil seeping at the rear of the head gasket. This is where the pressurized oil is fed to the rocker arms.