Holmatro ICU 40 A Serie Manual página 29

WARNING
Always make sure that the pressure relief valve is in the open (0) position, before you
disconnect hydraulic hose(s) from the pump.
• Disconnect the dust caps from each other.
• Turn the retainer ring on the female coupler anti-clockwise to unsecure the lock ring.
• Disconnect the quick couplers by pushing the lock ring on the female coupler backwards and the
male coupler will be released.
• Clean the couplers and the dust caps.
• Replace the dust caps on the female and male couplers.
5.4 Operate the deadman's handle
The deadman's handle is used to determine the movement of the blades. In the neutral position no
pressure is built up and the oil flows without pressure back to the pump. If the deadman's handle is
released, it returns automatically to the neutral position and stops the movement of the blades.
• Hold the deadman's handle in the
Return oil from the tool flows without pressure back to the pump.
• Hold the deadman's handle in the
Return oil from the tool flows without pressure back to the pump.
The tool has an overpressure relief valve. If the return line to the pump is blocked, this overpressure
relief valve will prevent excessive pressure in the tool by allowing oil to leak out.
WARNING
Never change the setting of this overpressure relief valve.
5.5 Relief the pressure in unconnected hoses or tools
5.5.1 General
Temperature differences can cause overpressure in unconnected hoses and tools. This overpressure
can make it impossible to connect the parts. You can use the pressure relief tool to remove this
overpressure. This accessory is available for all Holmatro hose systems and is supplied by default with
every pump.
NOTICE
We recommend you keep more than one of these tools on hand.
5.5.2 Quick-Lock system
Refer to Fig. 6.
• Turn the knob of the pressure relief tool counterclockwise to make room for the coupler.
• Press the pressure relief tool on to the coupler of the hose or tool.
• Wrap a cloth around the pressure relief tool, leave the knob free to operate.
WARNING
Make sure the cloth covers the oil openings, because a cloud of oil may appear without a
cloth.
• Turn the knob clockwise to release the pressure. Some oil will be released.
• Turn the knob counterclockwise and remove the pressure relief tool from the coupler.
ICU 40
position to open the blades. Pressure is built up in the tool.
position to close the blades. Pressure is built up in the tool.
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