Airman AX50U-4LA
Series: Airman Midi Excavator
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Airman midi excavators – the AX50U-4 and AX50U-4LA at 29.8 kW from four-cylinder 4TNV88-type engines, 4,730 to 5,350 kg operating weight
This page gathers the midi excavators AX50U-4 and AX50U-4LA from the Japanese maker Airman, part of the construction-equipment division of Hokuetsu Industries. The AX range marks Airman's excavator family, the number 50 the approximate weight class in hundreds of kilograms; the "LA" suffix on the AX50U-4LA marks a long-arm variant with greater reach.
Read on 3 more paragraphs
The register lists here 2 versions at 29.8 kW from four-cylinder engines of the 4TNV88 type with 2,189.3 cm³ displacement at 2,500 rpm, with operating weights from 4,730 to 5,350 kg.
Midi excavators in this weight class between the mini excavator and the standard excavator are sought on sites with tight working space, offering more digging force and reach than a mini excavator without fully losing its compactness; Airman positions itself alongside the established Japanese brands chiefly through compact, short-tail-swing designs. The tight tail-swing radius also makes it easier to work in narrow street spaces and on inner-city building sites.
On used examples, operating hours and the condition of the four-cylinder engine, undercarriage wear and track tension, the tightness of the hydraulic cylinders, and the condition of the boom, arm and bucket all matter; spare parts run through Airman importers, and for the engine also through independent workshops experienced with four-cylinder diesel engines of this type.
Technical data
Engine
| Engine model | 4NTV88correct |
|---|---|
| Power | 40.6 hp (29.8 kW)correct |
| Rated speed | 2,500 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 2,189.3 cm³correct |
Dimensions and weights
| Ground clearance | 335.3correct |
|---|---|
| Unladen weight | 5,350 kgcorrect |
Working data
| Pump flow | 125.3 l/mincorrect |
|---|---|
| Hydraulic pressure | 240 barcorrect |
Where this model stands
Power-to-weight ratio: 5.6 kW/t (30 kW / 5.3 t)
Stronger than 4% of the excavators & compaction in the register — out of 1,666 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Airman AX50U-4LA have?
The Airman AX50U-4LA delivers 40.6 hp.
How much does the Airman AX50U-4LA weigh?
The unladen weight is 5,350 kg.
What engine does the Airman AX50U-4LA have?
4 cylinders, 2,189 cm³ displacement.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 10 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: [1]
Excavator in 3D section
Turn the model, look inside and click an assembly — each one is explained.