ENGINE ARRANGEMENT 1W0740 - Caterpillar

Table 1
Required Tools    
Part Number    Part Description    Qty    
4C-4890     Hydraulic Test Group     1    
Move the transmission control to the NEUTRAL position and move the parking brake control to the ENGAGED position. Shut off the engine.
Install the steering frame lock. Refer to Operation and Maintenance Manual, "Steering Frame Lock".
Illustration 1 g01058391
Location of the test port for the service brakes on the trailer
Connect a 20700 kPa (3000 psi) pressure gauge to the test point.
Start the engine. Operate the engine at low idle for one minute in order to fully charge the service brake system.
Press the brake pedal and read the pressure on the gauge. The gauge should show 11000 700 kPa (1600 100 psi).If the pressure is incorrect, there may be a problem with the service brake control valve.
Release the brake pedal and observe the fall of the brake pressure. The pressure should fall below 30 kPa (4 psi). Residual pressure above this value can cause brake drag.If residual pressure occurs in the braking system there may be a problem with the service brake control valve or the braking system may require purging. Refer to Testing and Adjusting, "Service Brake Air - Purge".
Shut off the engine. Remove the pressure gauge and the steering frame lock from the machine. Refer to Operation and Maintenance Manual, "Steering Frame Lock".