Kubota KX040-4
The 4-tonne all-rounder rental fleets love
The Kubota KX040-4 is a 4-tonne class minimal-tail-swing excavator famed for reliability, smooth hydraulics and excellent resale value.
+Strengths
- Legendary Kubota reliability and resale value
- Strong, smooth hydraulics for its class
- Comfortable, roomy cab
- Simple to maintain
−Watch-outs
- Wider than 3-tonne class machines for tight access
- Needs a heavier trailer and tow vehicle than smaller minis
Overview
The Kubota KX040-4 sits at the top of Kubota's core mini excavator range and has become a staple of rental fleets and contractors around the world. At around 4 tonnes, it is big enough for house foundations, drainage runs and sewer connections, yet small enough to move with a large pickup and trailer in many markets.
Design and performance
Kubota builds the engine, the hydraulic pumps and much of the machine in-house, which contributes to its reputation for reliability. The minimal tail swing design keeps the counterweight close to the track width without sacrificing much stability. The hydraulic system is load-sensing, giving smooth combined movements, and the auxiliary circuits can be adjusted from the cab for different attachments.
Comfort
The cab is roomy for a mini, with good visibility, air conditioning in most markets and a digital display. Travel automatically shifts down when pushing, and the angle-blade option makes backfilling quicker.
Who it suits
Groundworkers, landscapers, utility contractors and rental companies who need one machine that can do most small to medium jobs reliably for many years.
Buying used
Kubota minis are easy to resell, so used prices stay high. Check track tension and sprocket wear, slew ring play, blade cylinder leaks and the condition of pins and bushings at the boom foot and bucket linkage.
Kubota KX040-4 specifications
| Operating weight | ≈4,200–4,400 kg (9,300–9,700 lb) |
|---|---|
| Engine power | ≈30 kW (40 hp) |
| Max. digging depth | ≈3.5 m (11 ft 5 in) |
| Engine | Kubota V2607 diesel |
| Tail swing | Minimal tail swing |
| Width | ≈1.95 m (6 ft 5 in) |
| Travel speed | ≈2.9 / 4.8 km/h (1.8 / 3.0 mph) |
Figures are typical for standard configurations as published by Kubota. Values vary by market, emissions tier, attachments and options; confirm with your dealer before purchase, transport or lifting.
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Frequently asked questions
Is the KX040-4 a zero tail swing excavator?
No. It has a minimal (reduced) tail swing, which keeps the counterweight close to the tracks while offering better stability than a pure zero tail swing design.
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