Disposing on spring actuator Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning from swallowing hydraulic fluid. Risk of injury caused by drilling gas-filled assemblies or components (noncombustible gases) - OS32.30-P-0620-01A

Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses. Wear safety glasses and a face mask. 

1. Allow hydraulic fluid or brake fluid to flow out of the oil gallery (a) into a suitable container for disposal.
2. Drill gas chamber (b) of the spring accumulator on the arched side (arrow) with a drill bit (3 mm dia.) until the gas flows out.
3. Dispose of spring brake reservoir as scrap metal.
   Fig 1: Identifying Gas Chamber Drilling Hole

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
   Fig 2: Identifying Oil Gallery And Gas Chamber

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.