Komatsu PC200-8M0 Shop Manual page 171

402 Hydraulic system, Part 2
Functions and operation by valve
When cylinder head pressure is higher than bottom pressure (digging operation, etc.)
Function
q Check valve (6) provided to regeneration circuit (C) closes to shut off the flow from the cylinder bottom
to the head.
PC200, 200LC, 220, 220LC-8M0
SEN06120-00
29
10-402