Installation
LXG520R
Grapple
22
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)
5.4.3 Electrical Connections
00804
4
5
3
6
1
2
Fig. 13 –
Electrical harnesses
1. Control Valve Connector
2. Harness
3. Control Switch
4. Power Connection
5. Fuse
6. Control Decal
IMPORTANT! When assembling wire harnesses, apply
a thin coating of silicone dielectric grease to the harness
connectors. The grease helps to stop any possibility of
future corrosion.
Clean the ends, then apply a small amount to the surfaces of
the connectors where they meet. Wipe off any excess.
•
Connect the harness to the control valve on the grapple.
Tie-wrap the harness to the auxiliary hoses and route along
the boom to the cab. Secure the harness to avoid chafing
or pinching.
•
In the cab, mount the control switch in a convenient place.
It should be positioned to easily toggle back and forth when
operating. For example, tie wrap it to the auxiliary valve
control handle. Place the decal near the control so it is
clearly visible.
•
Connect the harness to a 12 VDC power supply.
5.5 Grapple Removal
WARNING!
Risk of serious injury from escaping high-
pressure oil. Actuate controls after engine
shut down to relieve trapped pressure before
loosening hydraulic connections.
W080
1.
Select an area to store the grapple that is dry, level and free
of debris, away from human activity.
2.
Open the grapple forks for maximum stability. Set it down
on wood planks to keep it off the ground. Make sure the
grapple is stable.
3.
Shut down the excavator and apply the hydraulic circuit
lockout device. Actuate hydraulic controls to relieve any
trapped pressure in the circuit. Disconnect the hydraulic
hoses from the grapple and cap the lines to prevent dirt
from getting into the couplers.
4.
Remove the stick and link pins. Move the boom out of the
attachment bracket.
5.6 Storage
Store the grapple away from human activity in a dry, level area.
Place wood planks under it to keep it off the ground. If the
grapple cannot be stored inside, cover with a waterproof tarp.
1.
Clean the grapple to remove all dirt, mud, and entangled
material.
2.
Inspect the cylinder, rotator, pivot and grapple for damage.
Repair or replace damaged parts.
3.
Touch up all paint nicks and scratches to prevent rusting.
