WK-4A Mine-use Excavator

A.	The first 4m³Excavator had been manufactured in 1961, now it is still running in Neimenggu Pingzhuang and playing its role
B.	4m³ Excavator early stage products: D-4 and WK-4 two series.
C.	Dominant products of 4m³: WK-4A, WK-4B and WK-4C three types, on sale about 226 sets
D.

2. WK-4A Excavator

WK-4A Mine-use Excavator is the second generation of WK-4 modified machine type, and also one of the present main dominant product, had awarded the Shanxi Province Science & Technology Accomplishment Third Prize and Ministry Science & Technology Accomplishment Third Prize, had manufactured about 180 sets, widely used in the metallurgical, coal etc. middle and small opencast mines for excavating and stripping works, as well as Petroleum, Chemistry, Hydro-power, Construction etc. earth/stone work engineering

Technical Spec. of WK-4A
Nominal bucket volume	4m³	Main motor	250kW
Lifting speed	0.855m/s	Max. Excavating radius	14.3m
Pushing speed	0.53m/s	Max. Excavating height	10.1m
Traveling speed	0.43km/h	Max. Dumping radius	12.65m
Max. Lifting force	450kN	Max. Dumping height	6.3m
Max. Pushing force	225kN	Excavating depth	3.2m
Max. Crawling angle	12º	Working weight	202t
Average bearing pressure	238kPa	Theoretical productivity	572m³/h


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