Sany SY420
Series: Sany Hydraulic Excavator
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Sany Hydraulic Excavator – the SY range from the Changsha construction-equipment group: SY135 to SY420, Cummins engines, 69.1 to 235 kW, 13,500 to 41,600 kg
Sany is a Chinese construction-equipment group headquartered in Changsha in Hunan province. This page gathers the hydraulic excavators of the SY range: SY135, SY210, SY230, SY310 and SY420. On Sany excavators the number in the type designation gives roughly the operating-weight class in tonnes, so the SY135 sits in the 13.5-tonne class and the SY420 in the 42-tonne class; the range thus spans a wide field from mid-size excavator to heavy crawler machine.
Read on 3 more paragraphs
The register lists here 5 versions with 69.1 to 235 kW of power, three- to six-cylinder diesel engines of 4,302 to 11,951 cm³ displacement, mostly from Cummins, operating weights of 13,500 to 41,600 kg and rated speeds of 1,950 to 2,200 rpm.
Since the 2000s Sany has grown from the Chinese domestic market into one of the world's largest construction-equipment makers and is now present in Europe and North America with its own sales and service networks; there the SY excavators compete chiefly on price with established Japanese, Korean and European brands.
When buying used, what counts is the condition of the undercarriage and track tension, the tightness of the hydraulic cylinders on the boom, arm and bucket, the condition of the slew ring, the engine's operating hours, and rust on the undercarriage and boom bearings; spare parts and service increasingly run through Sany's own branches and authorised dealers.
Sources: Kennwerte der Modelle Sany Hydraulic Excavator, Sany (Hersteller)
Technical data
Engine
| Engine model | 6D24-TLU2Gcorrect |
|---|---|
| Power | 319.6 hp (235 kW)correct |
| Rated speed | 2,000 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 11,951.1 cm³correct |
Dimensions and weights
| Ground clearance | 557.8correct |
|---|---|
| Unladen weight | 41,600 kgcorrect |
Working data
| Pump flow | 720.4 l/mincorrect |
|---|
Where this model stands
Power-to-weight ratio: 5.6 kW/t (235 kW / 41.6 t)
Stronger than 87% 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 Sany SY420 have?
The Sany SY420 delivers 320 hp.
How much does the Sany SY420 weigh?
The unladen weight is 41,600 kg.
What engine does the Sany SY420 have?
6 cylinders, 11,951 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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
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This page carries 9 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.