1978 terramite 4 loosing Hydrulic pressure after about 20 minutes of working time, but always trams good. I’m thinking it’s the vane pump but not for sure. Anyone have any ideals?
1978 terramite 4 loosing Hydrulic pressure after about 20 minutes of working time, but always trams good. I’m thinking it’s the vane pump but not for sure. Anyone have any ideals?
Does it tram well even if it's a hill or over an obstacle that requires pressure? If you're only losing curl/cylinder function you might have a sticky relief though you should be able to hear it squealing.
It sounds like you're building up heat in the fluid maybe. Open all the access panels and get a thermometer gun. Look for temp spikes at relief valves and pumps.