DISC 5449055 - Caterpillar

Jaw Circuit
Lower the work tool to the ground and stop the engine of the host machine. Relieve the pressure from the hydraulic system. Refer to the Service Manual for the host machine for the proper procedure.
Illustration 1 g01897494
Install Tooling (A) and Tooling (B) on test fitting (1) .Note: You may also use the pressure gauge on Tooling (C) to check the pressure. Install Tooling (A) and (C) between two hoses (2) for the jaw circuit. Close the valve on the flow meter in order to check pressure.
Start the engine of the host machine and operate the machine until the hydraulic oil reaches normal operating temperature.
Open the jaws of the work tool. Close the jaws and continue to hold the control in the CLOSE position in order to allow the cylinder to stall. Observe the pressure on the gauge. The pressure should be 35000 2500 kPa (5075 360 psi). If the pressure is not within the specification, the pressure must be adjusted accordingly. Refer to the Service Manual for the host machine for the proper procedure.
After adjustments have been made, stop the engine on the host machine and relieve the hydraulic pressure.
Disconnect two hose assemblies (2) from the work tool. The two hoses complete the