RELIEF VALVE, INLET (KU-RG13870080)

Title:

Kubota Section Valve (Inlet)

Description:

The Kubota RG138-70080 Section Valve (Inlet) is a genuine OEM hydraulic control component designed as the inlet section of the main control valve assembly used in a variety of Kubota mini-excavators. This inlet section is responsible for receiving pressurized hydraulic fluid from the pump and distributing it into the multi-section valve block where it powers the machine’s primary working functions.

Engineered to Kubota’s factory standards, the RG138-70080 inlet valve section ensures consistent hydraulic flow, proper system pressure regulation, and smooth, responsive operation of boom, arm, bucket, and auxiliary circuits. As the first point of hydraulic entry into the control valve, this component is critical to maintaining peak system performance and preventing internal leakage or flow loss.

Constructed from precision-machined, high-strength alloy materials, the valve section is designed for long service life in demanding jobsite environments. It features OEM-designed internal galleries, relief ports, O-ring sealing surfaces, and mounting points that integrate seamlessly with the original control valve stack—guaranteeing perfect fit, reliable sealing, and correct hydraulic function.

Typical symptoms indicating the need to replace this part include stiff or unresponsive hydraulic controls, improper flow to one or more circuits, internal bypassing, weak hydraulic power, or visible leakage at the valve stack.

Model Fitment:

KX018-4

KX019-4

KX027-4

KX41-3S / KX41-3SV

U27-4