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

Claim 2:
3. The construction machine according to claim 1,
wherein the first flushing valve has a first manifold, and a first spool disposed in the first manifold,
the second flushing valve has a second manifold, and a second spool disposed in the second manifold,
a first tank connection line for permitting a line on a low pressure side of the cylinder closed circuit to communicate with the tank is formed at an intermediate portion of the first spool,
a second tank connection line for permitting a line on a low pressure side of the swing closed circuit to communicate with the tank is formed at an intermediate portion of the second spool, and
a width of the second tank connection line in a spool axial direction is smaller than a width of the first tank connection line in a spool axial direction.