WSL90D-20 pump adopts Caterpillar No. 3306 type 210 horsepower diesel engine, while main oil pump and hydraulic valve use imported REXROTH originals, so that the pump can reach up to: 90M3/h of pumping displacement, above 210m of vertical pumping height, and above 1100m of horizontal pumping distance. Service mortar concrete pumps life of pumping vat can not be lower than 35,000 -70,000m2 concrete, service life of wear-resistant parts under high voltage shall not be lower than 15,000 m2 concrete, while 25,000 m2 concrete under low voltage.