Recently picked up a 71-73 401, Operator Manual is on order from JD dealer. Where is the hydraulic fluid and check points, please? Tractor also will not stay running after initial 2 mile drive up the mountain. Drained fuel tank, little crusty in the bottom, blew out line to fuel pump, replaced filter, refueled, added diesel additive and bled through fuel filter. No obvious fuel leaks, ran 1 time for 7-8 minutes and then died (exhaust much cleaner now), starts for 10-30 seconds before and after the 1 long run. Any suggestions would be appreciated.