Hitachi EX27U Operator's Manual page 76

Shifting Auxiliary Pipe Line Selector Valve
When a hydraulic breaker (or other single actuating cylin-
der attachment) or a crusher (or other double actuating
cylinder attachment) is installed, selector valve (3) must be
positioned according to the type of attachment to be oper-
ated.
Position 4: Operating a breaker or similar (requiring only
ON/OFF operation)
Position 5: Operating a crusher or similar (requiring two
actions such as OPEN/CLOSE operation)
IMPORTANT:
1. Be sure to shift selector valve (3) only after stop-
ping the engine.
2. Always keep stop valve (6) on the arm closed when
an attachment is not installed or is not being oper-
ated.
3. When removing the attachment, be sure to cap or
plug the piping ends to prevent the hydraulic sys-
tem from being contaminated or the loss of hydrau-
lic fluid.
OPERATING THE MACHINE
5-6
3
Close
Open
M586-01-053
4
5
M586-01-050
6
M586-01-060
Plug
M586-01-061