Wallenstein LXG520R, Руководство оператора

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LXG520R
Grapple
Installation
21
Set Flow Rate and Relief Pressure
IMPORTANT! After installation is complete, cycle the
grapple, and then check the excavator hydraulic fluid level.
Check and adjust the grapple circuit so it is within the
specification.
• Set fluid flow rate at 5.3 US gpm (20 Lpm) .
• Set relief pressure at 3000 psi (207 bar)
• Check and adjust both grapple circuits so they are within
the specification.
5.4.2 Excavator with One Auxiliary Circuit
With only one circuit available for the two grapple functions, the
Selector Valve Kit must be installed.
• To Open or Close the grapple , actuate the auxiliary circuit
in either direction.
• To Rotate the grapple, press the momentary switch,
while actuating the auxiliary circuit in either direction. The
momentary switch is connected to the 12 V coil on the
grapple control valve. The valve spool shifts to divert fluid
to the grapple rotator.
Selector Valve Kit
IMPORTANT! If the excavator auxiliary circuit relief
pressure is set above 2900 psi (200 bar), the selector valve
must have a case drain line connected at port 'L' that returns
uninterrupted back to tank.
• The excavator auxiliary circuit hoses are connected to ports
A1 and A2 on the grapple control valve. The valve ports are
1/2" JIC (#8). See illustration.
• The grapple open/close function works through ports A1 ,
A2 and B1 , B2 ports. Shifting the valve spool diverts fluid
to C1 and C2 ports to rotate the grapple.
• Connect 3/8" JIC (#6) case drain line L back to the
reservoir.
Valve Port
Name
Function Size
A1 Pressure / return
(bidirectional)
1/2" JIC (#8)
A2 1/2" JIC (#8)
B1 Grapple close 1/2" JIC (#8)
B2 Grapple open 1/2" JIC (#8)
C1 Grapple rotate 1/2" JIC (#8)
C2 Grapple rotate 1/2" JIC (#8)
L
Case drain
(return to reservoir)
3/8" JIC (#6)
C1
C2
B2
A2
A1
B1
L
01319
A1
C1
A2
C2
L
B1
B2
Fig. 11 –
Control valve connections
A2 L
A1
01322
Fig. 12 –
Excavator hose connections