Copyright © 1998 Rayco - All Rights Reserved
Printed in U.S.A.
61
RG 1672 DXH DIESEL SUPER CUTTER
TM
RAYCO
®
T
ROUBLE
-S
HOOTING
of the operator, causing the cutting boom to move up
or down. In the case of lifting UP the cutting boom, for
example, the operator pulls the UP/DOWN lever
toward him, and the valve spool shifts to allow high
pressure fluid to enter the
rod
end port of the lift
cylinder, while simultaneously the spool opens a
passage that allows fluid from the cylinder
body
end
port to exhaust through the control valve body back to
the reservoir, where the oil is then recycled through
the hydraulic system. As the weight of the cutting
boom is thus overcome by the high pressure, the
piston inside the cylinder moves toward the exhausting
body
end port, raising the cutting boom.
Likewise, in the tongue IN/OUT circuit, the high
pressure is directed to one or the other side of the
directional control valve, through the hand of the
operator, causing the cutting boom to move in or out.
In the case of retracting IN the cutting boom, for
example, the operator pulls the IN/OUT lever toward
him, and the valve spool shifts to allow high pressure
fluid to enter the
rod
end port of the telescoping tongue
cylinder, while simultaneously the spool opens a
passage that allows fluid from the cylinder
body
end
port to exhaust through the control valve body back
HC (Hydraulic Cylinders) Circuits
All cutting boom motion is accomplished by controlled
pressure applied within hydraulic cylinders.
That pressure is created by the HC pump (8), which
is driven by the engine through a V-belt. The HC pump
should require no special maintenance. The pump, a
gear type, draws hydraulic oil from the reservoir (1),
and energizes it through a high pressure hose (11), at
2.86 GPM at 1,500 psi when engine speed is 2,800
rpm, to the three bank control valve (9). The control
valve contains an integral relief valve which prevents
system pressure from exceeding 1500 psi. The control
valves, under the influence of the operator's hands
upon the levers, control the movement of the cutting
wheel UP/DOWN cylinder (14), the telescoping tongue
IN/OUT cylinder (15), and the SWING cylinders (16 &
17). Exhaust oil from the control valve is routed
through a return hose (18), and back to the reservoir.
The hoses that run to the cylinder ports are attached
to respective ports of the directional control valve. In
the cutting boom UP/DOWN circuit, the high pressure
produced by the pump, is directed to one or the other
side of the directional control valve, through the hand
Summary of Contents for SUPER CUTTER RG 1672 DXH DIESEL
Page 4: ......