Patent ID: 11859367
Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E  F

Claim 1:
2. The construction machine according to claim 1,
wherein the first flushing valve has a first manifold, a first spool disposed in the first manifold, a first spring that is disposed in the first manifold and that biases the first spool, and a first shim disposed between the first spool and the first spring,
the second flushing valve has a second manifold, a second spool disposed in the second manifold, a second spring that is disposed in the second manifold and that biases the second spool, and a second shim disposed between the second spool and the second spring, and
a thickness of the second shim in a spool axial direction is larger than a thickness of the first shim in a spool axial direction.