Volvo EC360B - Page 234

2-stage port relief valve operation
(1) 1-way (Hammer)
- When x1 selection switch is ON and X1 uses 1way, releif valve goes to low pressure setting without pilot
pressure.
(2) 2-way (Shear)
- When x1 selection switch is ON and X1 uses 2way, releif valve goes to high pressure setting due to pilot
pressure ON.
Picture text: