Recently purchased a 1970 JD 3020. Like many I have been around, needed 30 seconds of engine running for steering / hydraulic system to fully pressurize when I got it. Fluid had water when I got it home, so changed and replaced filter, which was also pretty plugged. All was good for the next 5 hours of use. Then the steering needed more time, followed by the PTO slipping under even light load. Now PTO will not pull any load and steering is intermittent. Advice? Do I need to have it split and PTO clutch replaced?