Ice 18ZR, Руководство по эксплуатации и обслуживанию

Страница: 47 / 86

Section 6: MAINTENANCE Page 4 5 OM-ZR-May15
Setting Clamp Restore Pressure
The Clamp Pressure Switch (PS1 on hydraulic schematic) monitors clamp pressure when the clamp is closed. If
clamp pressure drops below 4500 (310 bar), the pressure switch activates the clamp control valve to restore
clamp pressure.
To set clamp pressure switch:
1. The Clamp Relief Valve (RV2) must be set to 4800 psi (330 bar) prior to setting the Clamp Pressure
Switch.
2. The Clamp Pressure Switch is located on the clamp manifold, which is located on the right behind the
quick-disconnect couplers at the power unit (see drawing on page 44).
3
. Connect clamp hoses from clamp to the power unit. Make sure the quick disconnects are fully
tightened.
4. Start engine and adjust to 1000 rpm.
5. Bleed clamp hoses before attempting to set the Pressure Switch.
6. With the power unit running and warmed up, turn Clamp switch to CLOSE. It will take a few
seconds for the clamp cylinder to move and begin building full pressure.
7. Observe the pressure reading on the Clamp gauge. Adjust the adjusting screw of the pressure switch with
a flat blade screw driver to 4500 (310 bar). Clockwise increases the pressure setting and counterclockwise
reduces the pressure setting.
8. It may be necessary to momentarily turn the Clamp switch to OPEN and release some of the pressure
before bringing the pressure adjustment down. Make adjustments to the switch and then turn the Close
Clamp switch to CLOSE again.
9. Once the pressure is adjusted, recheck your setting. Readjust if necessary.
Setting Clamp Temperature Relief Valve
The Clamp Temperature Relief Valve (RV4 on hydraulic schematic) must be set at 5,800 psi (400 bar).
The clamp temperature 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 (see drawing on page 44).
To set clamp temperature relief valve:
1. While holding the clamp temperature relief valve adjusting screw with a hex key, loosen the adjusting
screw jam nut with an open-end wrench.
2. Turning the adjusting screw clockwise as far as it will go.
3. Back off adjusting screw counter-clockwise 1/4 to 1/2 turn.
4. Tighten adjusting screw jam nut.
840210
Thermal relief valve
(RV4)
Clamp pressure switch
(PS1)