HYDRAULIC CY 0786876 - Caterpillar

Turn the engine start switch key to the OFF position in order to stop the engine.
Exit the machine. Note: If you are installing a material handling arm that is not equipped with the optional center step, do not exit the machine. A second person needs to perform steps 12 through step 14.
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Engage the coupler pins (3). If the machine is equipped with a manual coupler, ensure that the levers (1) for the coupler are in the ENGAGED position. If the machine is equipped with a electrical quick coupler, refer to Operation and Maintenance Manual, "Operator Controls" for details on engaging the coupler pins.
If the work tool requires hydraulics, refer to the following procedure in order to connect the hydraulic hoses.
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Route the hydraulic hoses through the hose guide on the machine in order to prevent damage to the hoses. Not all work tools require the hydraulic hoses to be routed through the hose guide. The work tool Operation and Maintenance Manual will inform you if the hydraulic hoses need to be routed through the hose guide. Cat work tools require the hoses to be routed through the hose guide.
Ensure that the quick connect couplers are clean. Visually inspect the couplers for corroding, cracking, damage, or excessive wear. Replace the couplers if necessary.
In order to release the pressure, push the couplers together and hold for 5 seconds. The pressure is released as the couplers are installed.
Connect the auxiliary hydraulic hoses for the work tool to the machine (J), (K), and (L). Full connection is made when the sleeve of the female coupler slides forward.
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If the work tool is equipped with electrical lines, then route the electrical lines with the hydraulic hoses. Connect the wire harness to the electrical connector (E) on the host machine. Check the connections in order to ensure that the connections are properly secured. Check the connections on the work tool in order to ensure that the connections are in the correct receptacle. Note: If your High Flow work tool does not have a wiring harness, a Jumper Plug should be installed on the electrical plug for the work tool control. Without this Jumper Plug, the machine will not provide high flow to the work tool. Refer to your Parts Manual for the current part number for the Jumper Plug.
If the work tool is equipped with a water line, then connect the water line from the work tool to the connector on the machine. Move the water line to a position that is away from the work tool mounting bracket.
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(3) Coupler Pins
(4) Manual Work Tool Coupler
(5) Electric Work Tool Coupler
(6) Lever for the Coupler Pin
Visually ensure that both coupler pins (3) are extending out of the holes in the work tool mounting bracket.
Use the following procedure to verify engagement of the coupler pins.
Enter the machine.
Fasten the seat belt and lower the armrests.
Start the engine.
Disengage the parking brake.
Raise the work tool off the ground.
Visually inspect the coupler pins (3) in order to ensure that