LIFT ARM ASSEMBLY 1302407 - Caterpillar

Hydraulic Quick Change Coupler with Single Effect (If Equipped)
Securing the Implement
Inspect coupler wedge engagement before operating the excavator.Serious injury or death may result from improperly engaged coupler.Coupler wedge engagement can be inspected from the cab by rotating the bucket or implement inward. Extend the bucket cylinder to bring the coupler actuator into view and bring the stick in until the wedges are visible.
Illustration 1 g00104707
Position the implement on a level surface.
Retract the bucket cylinder. Position the quick coupler in alignment between the hinges of the implement.
Illustration 2 g00104708
Move the stick forward and raise the stick until the lower bosses (1) engage the hinges (2) of the implement.
Illustration 3 g00652982
(A) Button (B) Button (C) Indicator light
The control for the quick coupler is located above the monitor panel. Push buttons (A) simultaneously. Indicator lights (C) above buttons (A) will start flashing. Stall the bucket circuit momentarily in the fully retracted position. The wedge on the quick coupler will extend.
Illustration 4 g00104709
Extend the bucket cylinder fully in order to rotate the quick coupler toward the implement.Center bosses (3) must engage with the cut-out of the hinge.
Push button (B) in order to retract the wedge on the quick coupler.Stall the bucket circuit in the fully extended position. The springs and hydraulic pressure in the quick coupler will move the wedge into the locking area (4) .
Illustration 5 g00104710
Raise the boom or raise the stick. The implement is locked in place. The implement is ready to use.Releasing the Implement
Place the work tool or bucket in a safe position before disengaging the coupler. Disengaging the coupler will release the work tool or bucket from control of the operator.Serious injury or death may result from disengaging the work tool or bucket when it is in an unstable position or carrying a load.
Illustration 6 g00104711
Level the bucket or level the implement on the ground.
Illustration 7 g00652982
(A) Button (B) Button (C) Indicator light
The control for the quick coupler is located above the monitor panel. Push buttons (A) simultaneously. Indicator lights (C) above buttons (A) will start flashing. Stall the bucket circuit momentarily in the fully retracted position. The wedge on the quick coupler will extend.
Illustration 8 g00104713
Retract the bucket cylinder fully in order to move the quick coupler toward the machine.
Push button (B) in order to retract the wedge on the quick coupler.
Illustration 9 g00104714
Lower the stick and move the stick toward the machine in order to disengage the quick coupler.