PLUG-DRAIN 2043134 - Caterpillar

Make reference to the S on the first several pages of the Testing And Adjusting section.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Note: Although the parking brake is spring applied, it is still important to remove the air from the parking brake system. Use the following procedure to remove air from the parking brake system.
Illustration 1 g00294889
Bleeder Screw for the Parking Brake (1) Bleeder screw. (2) Cylinder.
Start the engine and allow the oil pressure to reach the cut-out pressure. Stop the engine.
Put the parking brake control valve in the RELEASE position by lowering the parking brake lever.
Connect a hose to bleeder screw (1) that is located near the top of cylinder (2) on the parking brake housing assembly.
Slowly open bleeder screw (1) until oil flows through the hose.
Allow the oil to flow until there are no air bubbles in the oil. Tighten bleeder screw (1) .
Repeat steps 1 through 5 for the other parking brake assembly bleeder screw.