Yeah agree with feeding front first, strange thing is the relief only passes when a lever is operated, like it’s getting dead headed. I’ll get some gauges on tomorrow and see what they say
If you could send me a picture of the hydraulics schematic for the rear control that would be great,
Yeah I know but hoping if I can identify block there might be a relief available under the manufacturers part as opposed to the Massey one
Cheers
Can you test pressure between front and rear block without dead ending the circuit
Struggled for jic fittings so best I could was put a gauge on dipper ram hoses, max pressure was only 700psi, also there is 300psi in the return side.
If there's no relief valve on the back, then the power beyond is a good place to look. As far as I know, it's not a valve, just a plug to block off the passage. Could have blown an O ring. If that doesn't show anything, then I'd check for leakage in the return off the loader valve when you operate the back, or disconnect the pressure line to the rear and check the pressure there, would have to be able to block the flow to do that, or see if it loads the engine and goes over the loader main relief.
I know the older 50's didnt have a relief vavle for the back block as we soon found out when we tried using the block on a hiab, had to fit one
Yeah there is a return to tank from front block which I presume takes return fluid from services and PRV with minimal back pressure, I’m thinking if there’s issue with power beyond sleeve then the majority of the fluid will be getting dumped to tank as easiest route. As it’s stuck in a wet field I’m thinking I’ll need to run a line from front 3rd service to back block just to get it operating as front block is tucked up beside gearbox
, job for another day once I get oil
