Kubota KX033-4 and U35-4: arm choices, tail clearance and attachment circuits

KX033-4 front equipment versus U35-4 rear clearance

Kubota's U35-4 American brochure calls the machine tight-tail-swing, with the counterweight protruding 1.9 inches. The engine hood sits inside that counterweight edge. Tight tail does not mean every part stays within the tracks: the boom, attachment and working load still have their own swept area.

Compare the counterweight clearance with the space available beside a trench before choosing between these machines.

On the U35-4, blade float is standard on both straight and angle-blade versions, while hydraulic angling is an option. The angle function uses the rocker on the blade lever; the same lever handles blade height and float. A dozer lever with a travel-speed switch does not, by itself, establish that hydraulic angling is installed.

The auxiliary diverter provides another distinction worth checking during an attachment change. Kubota describes diverting oil to an attachment without removing the thumb pipeline. The third-line return has a different purpose: returning oil directly to the tank for one-way attachments, bypassing the control valves.

These features describe different parts of the plumbing.

Source: Kubota U35-4 American brochure, tail swing, blade and auxiliary circuits.

Which KX033-4 arm and hydraulic setting is fitted?

The KX033-4 booklet offers an extendable arm separately from the standard front. Its stated extension describes movement of that arm section, not an equal increase in every digging or loading dimension. Obtain the working-range diagram for the fitted arm when the job depends on reaching over an obstacle.

The digital panel stores attachment flow settings, with AUX1's maximum specified separately from the excavator's pump capacities. Adding the pump figures would not produce a usable thumb or breaker allowance. An attachment's selected flow and its required return path must agree with the actual installation.

Kubota also describes a Tier 4 Final engine without DOC or DPF in this KX033-4 publication. That specific exhaust arrangement matters when interpreting a seller's claim about regeneration. It should not be replaced with the emissions description of a larger KX machine.

Finally, travel auto-shift can move from high to low as traction demand changes. It is separate from automatic engine idling when the controls remain neutral. Record whether the machine slows while travelling or merely drops engine speed at rest; those observations describe different functions.

Source: Kubota KX033-4 American brochure, arm option, flow controls, engine and travel behavior.