BRACKET 4J8859 - Caterpillar

Securing the Work Tool
Inspect the coupler wedge engagement before you operate the excavator.Serious injury or death may result from an improperly engaged coupler.Inspect coupler wedge engagement from the cab by rotating the bucket or the work tool 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 work tool on a level surface.
Retract the bucket cylinder. Position the quick coupler in alignment between the hinges of the work tool.
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(1) Lower bosses (2) Hinges
Move the stick forward and raise the stick until the lower bosses (1) engage the hinges (2) of the work tool.
Illustration 3 g00748862
(A) Location of the switch for the quick coupler
Illustration 4 g00673900
(1) Locked (2) Locking position (3) Unlocking
Rotate the switch for the quick coupler to the UNLOCKING position in order to extend the wedge. The switch for the quick coupler is located rearward of the left armrest.Note: Whenever the wedge is extended, a warning alarm will sound.
Illustration 5 g00104709
(3) Center bosses (4) Locking area
Extend the bucket cylinder in order to rotate the quick coupler toward the work tool.Center bosses (3) must engage with the cut-out of the hinge.
Move the switch for the quick coupler to the LOCKING position in order to retract the wedge.Note: Whenever the wedge is retracted, a warning alarm will sound. The springs in the quick coupler will move the wedge into the locking area (4) .
Illustration 6 g00104710
Raise the boom or raise the stick. The work tool is locked in place. The work tool is ready to use.Releasing the Work Tool
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.
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Level the bucket or level the work tool on the ground.
Illustration 8 g00673900
Rotate the switch to the UNLOCKING (3) position in order to extend the wedge. The switch for the quick coupler is located rearward of the left armrest.Note: Whenever the wedge is extended, a warning alarm will sound.
Illustration 9 g00104713
Retract the bucket cylinder in order to move the quick coupler toward the machine.
Move the switch for the quick coupler to the LOCKING position in order to retract the wedge.
Illustration 10 g00104714
Lower the stick and move the stick toward the machine in order to disengage the quick coupler.