Komatsu PC200-8M0 Shop Manual page 173

402 Hydraulic system, Part 2
Functions and operation by valve
When cylinder head pressure is lower than bottom pressure
Function
q Check valve (6) installed to regeneration circuit (C) closes and shuts off the oil flowing from the cylinder
head to the bottom.
PC200, 200LC, 220, 220LC-8M0
SEN06120-00
31
10-402