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hi i have a 724 international the arms dont want to lift on 3 point hitch i cant anyone have any thoughts on were to start you can pick arms up by hand so not stuck any tips would be great
 

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Hydraulic layout 724.

Pressure oil from pump may pass through a pressure filter, then to the flow divider which is the base block for the auxiliary valves, then to the main hitch valve.

When an auxiliary valve is operated the flow divider diverts flow to the aux valves and stops oil flow to the hitch, when aux valve is released the flow to the hitch is restored.

A quick test put a 3000 psi gauge into an aux valve outlet and operate that valve, you should get 2000 t0 2500psi, if not pump is @ fault, if ok then problem lies in the hitch control valve assy, see second att above for layout.
 
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