5. Installation
The skid steer must have enough weight in the rear to balance
the load of the grapple.
5.1 Matching Grapple to Skid Steer
Use the following table as a reference guide.
Grapple
Model
Recommended
Engine Power
Required
Hydraulic Oil
Flow
Grapple
Weight
LXG420S
25–65 hp
(19–48 kW)
5 US gpm
(19 Lpm)
560 lb
(254 kg)
LXG420R
30–70 hp
(22–52 kW)
5 US gpm
(19 Lpm)
588 lb
(267 kg)
LXG430S
60–100 hp
(45–75 kW)
5 US gpm
(19 Lpm)
1050 lb
(476 kg)
LXG430R
60–100 hp
(45–75 kW)
5 US gpm
(19 Lpm)
1124 lb
(510 kg)
LXG430RP
70–100 hp
(52–75 kW)
10 US gpm
(38 Lpm)
1444 lb
(655 kg)
5.2 Hydraulic Connection
Requirements
LXG420S, LXG430S Models
Grapple '
S
' models require one remote pressure and one return
connection.
LXG420R and LXG430R Models
Grapple '
R
' models require two sets of remote pressure and
return connections—one set for the grapple open/close, the
other for the hydraulic rotator.
LXG430RP
The LXG430RP model requires one remote pressure and one
return connection. This model is equipped with a flow divider
valve so that the boom extend and winch are controlled with the
same hose connections.
Arrows on the Rotator Body Indicate
Function
For reference, models equipped with the hydraulic rotator have
connection functions indicated on the rotator body.
Grapple Open
Grapple Close
R
Grapple Rotate
5.3 Connecting to the Skid Steer
LXG400 series grapples are equipped with a universal quick-
attach plate, that is compatible with skid steer quick-attach
hitches. See the skid steer manufacturer's documentation for
specific instructions on hitch-plate mounting.
1.
Clear the area of bystanders.
2.
Make sure that there is enough room and clearance to
safely drive the skid steer to the grapple, and that the skid
steer is square to the grapple.
3.
Lift the latch arms on the quick-attach hitch and make sure
that the latch pins are retracted.
4.
Tilt the hitch forward until the top edge of the hitch is below
the flange on the rear of the grapple plate and centered
between the vertical plates.
5.
At the slowest speed possible, drive the skid steer forward
to the grapple plate.
6.
Tilt the skid steer hitch back to engage the flange on the
grapple plate.
7.
Turn off the skid steer, apply the parking brake, and then
dismount to inspect the pin alignment.
8.
Push the latch arms fully down to extend the latch pins
through the grapple plate latch-pin mount and secure
the grapple. Make sure that the hitch and latch pins are
correctly engaged and secure.
9.
Connect the hydraulic lines as required.
10.
For LXG420R, LXG430R, and LXG430RP models, fit the
control selector in the skid steer cab and connect it to a
12 V power supply.
5.3.1 Set Flow Rate and Relief Pressure
•
Set oil 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.
IMPORTANT! After installation is complete, cycle grapple
then check the skid steer hydraulic oil level.
LXG400 Series
Log Grapples
Installation
23
