| 摘要 |
PROBLEM TO BE SOLVED: To achieve a mechanism for prioritizing a handle operation with a simple configuration in a wheel loader in which a steering operation can be performed by a handle operation and a lever operation, and to stably operate the mechanism.SOLUTION: A steering device of a wheel loader includes a handle-prioritizing valve 50 having a prioritizing control valve 51 and a selector valve 52. The prioritizing control valve is disposed between a handle control valve 26 and a lever electromagnetic control valve 27, and between the handle control valve 26 and a steering valve 25, and includes: a handle stage Sh that communicates the handle control valve with the steering valve and blocks between the lever electromagnetic control valve and the steering valve; and a lever stage Sl that blocks between the handle control valve and the steering valve and communicates the lever electromagnetic control valve with the steering valve. The selector valve switches the prioritizing control valve to the handle stage when a differential pressure occurs between right and left pilot oil paths. |
