Kubota KX71-3GLS/HGLS: auxiliary flow, control patterns and manual scope

KX71-3 auxiliary flow and control patterns

Kubota's KX71-3S operator manual gives the service port its own activation and flow settings. The right and left directions can be limited independently through 15 steps. The last selected operating mode returns when the key is switched on again, so a slow attachment may be running with a previous owner's restricted setting.

Check the display before assuming the main pumps are worn.

The manual also cautions that identical limit selections on two machines need not produce identical attachment speeds. Set the tool on the excavator that will actually operate it, including the combined movements needed for the job. Its theoretical service-port delivery is 49.5 litres per minute, with a specified maximum pressure of 20.6 MPa.

That is an attachment connection rating. It is different from quoting one main pump's displacement or adding unrelated hydraulic capacities.

The pattern selector sits beside the operator's seat and has a locking knob. Its two positions exchange boom and arm functions between the joysticks while bucket and house-swing commands retain their listed functions. Secure the selector after choosing a pattern, then verify the controls slowly.

A familiar cab layout is insufficient evidence that a rented machine uses the pattern the operator expects.

Which KX71 figures identify a part or an attachment?

The factory brochure labels its machine KX71-3S; this comparison retains the GLS and HGLS catalogue identifiers. It does not document a new performance package from those letters alone. The operator book names the V1505-E4-BH-1 engine, whereas the brochure abbreviates the engine designation.

For engine parts, use the plate on the installed engine instead of treating every shortened catalogue name as a different engine.

The brochure's two piston-pump entries and separate gear pump are not the auxiliary-port flow specification. Its hydraulic-oil table also separates reservoir quantity from complete-system quantity. Those distinctions matter when deciding whether an attachment can run and when preparing an oil service: a pump delivery rate measures movement of oil, while a reservoir figure measures stored oil.

Cab and canopy equipment have separate weight and height entries. Lift diagrams make another distinction, showing front lifting with the blade raised or lowered and lifting over the side. Choose the matching diagram before using a capacity number.

The coupling-hook drawbar limit in the operator manual is a different measurement from the brochure's low-speed traction figure; neither is a suspended-load rating for the boom.