Komatsu Galeo PC800-8 Shop Manual page 141

10 Structure, function and maintenance standard
When EPC valve is not operated
• Sleeve (4) of VC valve (1) does not operate if the
pilot pressure from EPC valve (2) is not present.
• In this case, ports (PH) and (PS) are connected
and the connection between ports (PS) and (TD)
is cut off.
• Since the pressure in chambers (a) and (b) is set
to the same level, servo piston (4) is moved to
the left.
• The pump delivery is kept at the minimum.
PC800, 850-8
SEN00383-03
19