Holmatro CORE XR 4360 RAM, Owner'S Manual

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6
6. Operation
The oil from the hydraulic pump is supplied to the unit via high-pressure hoses. The oil returns at
atmospheric pressure to the pump if the dead-man's handle is in the neutral position.
Fig. 1. Control handle label.
Oil is admitted under the piston if the dead-man's handle is in the “open” position. The arms will
then open. The oil above the piston flows back to the pump.
Oil is admitted above the piston if the dead-man's handle is in the “close” position. The arms will
close. The oil under the piston flows back to the pump.
The dead-man's handle always returns to the neutral position when released.
TWIN-LINE TOOLS
The hydraulic system in the unit is provided with a safety valve. This safety valve prevents
excessive pressure in the tool if the return line to the pump is blocked or disconnected. Never
change the setting of this safety valve. Oil will discharge from the rear of the tool if the return hose
becomes blocked or disconnected while the pump pressure relief valve is in
“PRESSURE”/”OPERATION” position. If this happens, first switch the pump pressure relief valve
to the “NEUTRAL” position, and then re-connect the return hose of the tool.
CORE™ TOOLS
The hydraulic system in the unit is provided with a safety valve. This safety valve prevents
excessive pressure in the tool if the return line to the pump is blocked. Never change the setting of
this safety valve. Oil will discharge from the rear of the tool if the return hose becomes blocked
while the pump is running. If this happens, first switch the pump engine/motor to OFF and
disconnect the hose. Then connect a new hose.
When Holmatro valve blocks are mounted on your Holmatro power unit, the manual
operated release valve is no longer needed. As soon as the hose is connected, oil is flowing through
the hose’s inner shell and returning back to the tank of the pump through the hose’s outer shell.
When a rescue tool with the adaptor installed has been connected to the hose, oil will flow
into the tool. To change from one rescue tool to another, the user simply disconnects the rescue tool
from the hose and connects the alternate rescue tool to the hose. Oil always flows from the female
coupler into the male coupler for Holmatro systems.