Safety - Section 22 10/11 OM2210 Page 22-4 Warnings and Cautions A warning plate is attached to the frame above the hydraulic system Auxiliary Power Unit (APU) quick disconnect fittings. The plate alerts technicians that high pressure hydraulic oil is present during opera- tion. Use caution when opening the hydraulic sys- tem. There is always a chance of residual pressure being present. Loosen fittings slowly to allow pres- sure to dissipate before removing any connections. A plate on the side of the hydraulic tank provides instructions for filling the hydraulic tank. Keep the system open to the atmosphere only as long as necessary to lessen the chances of system contamination.
Service the tank with clean type C-4 hydraulic oil. All oil being put into the hydraulic tank must be filtered to 3 microns. Pressurized operating fluids, such as hydraulic oil, can have sufficient force to penetrate skin. Serious injury and death may result if proper medical treatment from a physician familiar with this injury is not received immediately. This plate is located on the battery box and near the battery disconnect switches to indicate that the bat- tery system is a negative ground system. This danger plate is attached to each suspension and steering accumulator. These plates warn that the suspension and accumulators are charged with high pressure nitrogen.
Read the service manual and fol- low safety procedures when performing service on these components. These decals are placed above the battery discon- nect switches on the right side of the front bumper to indicate OFF and ON positions of the switches.