Komatsu Galeo PC800-8 Shop Manual page 161

10 Structure, function and maintenance standard
4. Safety valve
Function
• When the engine is started, the pressure in port
P of the fan motor is heightened in some cases.
• Safety valve (1) is installed to protect the fan sys-
tem circuit.
Operation
• If the pressure in port P rises above the cracking
pressure of safety valve (1), valve (2) of safety
valve (1) opens to release the hydraulic oil into
port T.
• By this operation, generation of abnormal pres-
sure in port P is prevented.
PC800, 850-8
SEN00383-03
39