Device for maintaining straight run of construction machines

摘要

The construction machine e.g. an excavator, crane etc. has two pumps (P1,2) with the same delivery vol., and a left-(TL) and right-hand hydraulic motor (TR). There are also other drives for working tools (SW,ARM,BM,OPT,BKT) operated by oil from the two pumps.There is an oil feeder from the two pumps to both hydraulic motors, when only the left- or the right-hand motor are operated. The oil from the two pumps is collected and uniformly distributed to the two motors, when a working tool has to be operated simultaneously with the two motors.