Section 6: MAINTENANCE Page 4
3
OM-ZR-May15
Setting Clamp Relief Valve for Vibrator
The Clamp Pressure Relief Valve (RV2 on hydraulic schematic) must be set at 4,800 psi (330 bar).
The clamp relief valve is located on the power unit clamp manifold that is located on the right behind the quick-
disconnect couplers at the power unit.
Keep hands away from the clamp as it opens and closes
.
To set clamp relief valve:
1. Clamp hoses must be attached to set relief valve.
2. Start and warm up the diesel engine.
3. With the engine warmed up, increase engine speed to 1800 rpm.
4. While observing the CLAMP pressure on the CLAMP pressure gauge (GA1), turn the clamp (OPEN-
CLOSE) switch to OPEN.
5. The pressure should read 4800 psi (330 bar).
6. If the pressure does not read 4800 psi (330 bar):
a. Release the clamp (OPEN-CLOSE) switch.
b. While holding the clamp relief valve adjusting screw with a hex key, loosen the adjusting screw
jam nut with an open-end wrench
c. Adjust the clamp relief valve by turning the adjusting screw approximately 1/8th turn in the desired
direction. Turning the screw clockwise will increase the pressure setting. Turning counter-clockwise
will decrease the pressure setting.
7. While observing the CLAMP pressure gauge (GA1), turn the clamp (OPEN-CLOSE) switch to OPEN.
8. The pressure should read 4800 psi (330 bar).
9. If the pressure is not correct, repeat steps 6 through 8.
!WARNING – Safety!
Clamp relief valve
(RV2)
Clamp pressure switch
(PS1)
Thermal relief valve
(RV4)
Clamp Solenoid Valve
(V1)
840210
