Here is the instruction show you guide on how to perform relief valve setting pressure for Kubota L3301 L3901.
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Relief Valve Setting Pressure
1 Disconnect the power steering delivery pipe joint bolt.
2 Install the adaptor E instead of joint bolt, and then set a thread joint, cable and pressure gauge.
3 Start the engine and set the engine speed at max. speed.
4 Fully turn the steering wheel to the left or right and read the pressure when the relief valve functions.
5 Stop the engine.
6 If the pressure is not within the factory specifications, check the pump delivery line, and adjust relief valve setting pressure by turning adjusting screw (1).
