Wallenstein LXG520R, Руководство оператора

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Installation
LXG520R
Grapple
20
5.4 Hydraulic Circuit Requirements
For the most efficient operation and ease of handling, the
hydraulic controls should provide variable-flow, and preferably
be fingertip-controlled. A simple on-off control is not desirable.
You want to be able to pick up your load cleanly and not smash
down on top of it.
If your excavator does not have an auxiliary circuit,
or an extra spool on the main control valve, other
provisions must be made and are not covered in
this manual. Contact your distributor, dealer, or
Wallenstein Equipment.
At least one auxiliary bidirectional hydraulic circuit
is required on your excavator to power the grapple
(a
bidirectional valve is able to supply controlled hydraulic fluid
flow in two directions). Hydraulic fluid flow must be supplied
to either side of the grapple allowing it to open and close, and
rotate.
Hydraulic circuit requirements for the grapple can be setup on
an excavator two different ways:
1. The excavator has two auxiliary circuits available to
power grapple functions (1) open/close and (2) rotate.
2. The excavator has one auxiliary circuit to power the
grapple functions and the fluid flow must be redirected
to (1) open/close and (2) rotate. In this case, an auxiliary
selector valve kit must be installed and connected to a
12 VDC electrical power supply.
5.4.1 Excavator with Two Auxiliary Circuits
For a log grapple, two auxiliary circuits are ideal. The control
valve must be bidirectional, and permit setting flow and
pressure. If there is only one circuit available on your excavator,
an extra control valve must be installed that can shift fluid flow
between the rotate and open/close. See
Excavator with One
Auxiliary Circuit on page 21 .
Grapple Hydraulic Connections
Valve Port Function Size
1 Grapple close
1/2" JIC (#8) 2 Grapple open
3 Grapple rotate
01318
2
3
1
Fig. 9 –
Control valve connections
01320
1
2
3
Fig. 10 –
Hydraulic connections