VALVE GP-CHECK 3278043 - Caterpillar

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.
Illustration 2 g00104708
(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 g01220231
Pull up on the switch and move the switch for the quick coupler to the UNLOCKED position in order to extend the wedge. The switch for the quick coupler is located on the right side of the operator. Note: Whenever the wedge is extended, a warning alarm will sound. When the switch for the quick coupler is moved to the LOCKED position in order to retract the wedge, the warning alarm will stop.
Illustration 4 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 cutout of the hinge.
Illustration 5 g01098797
Pull up on the switch and move the switch for the quick coupler to the LOCKED position in order to retract the wedge. The springs in the quick coupler will move the wedge into the locking area (4).
Retract the bucket cylinder. Make sure that the wedge is engaged. Shake the work tool.
Visually check in order to ensure that the work tool is properly locked.
Illustration 6 g01207244
Verify that the quick coupler and the work tool are locked together.
Place the work tool on the ground.
Apply pressure to the work tool against the ground.
Drag the work tool backward. 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.
Illustration 7 g00104711
Level the bucket or level the work tool on the ground.
Illustration 8 g01220231
Pull up on the switch and move the switch to the UNLOCKED position in order to extend the wedge. The switch for the quick coupler is located on the right side of the operator. Note: Whenever the wedge is extended, a warning alarm will sound. When the switch for the quick coupler is returned to the LOCKED position in order to retract the wedge, the warning alarm will stop.
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 LOCKED 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. Circuit for Universal Coupler (If Equipped)
Operation
This procedure describes the use of the hydraulic circuit with a Caterpillar dedicated quick coupler. If a different quick coupler is used, please contact your Caterpillar dealer for pressure adjustment and consult the documentation for the quick coupler for proper operation.
The engine start switch is on.
The engine is running.
The hydraulic lockout control must be in the UNLOCKED position in order to operate the quick coupler