OM2228 Safety - Section 22 Warnings and Cautions Page 22-3 A warning plate is mounted on top of the radiator surge tank cover near the radiator cap. The engine cooling system is pressurized when the engine is on and/or when the system is hot. Turn the engine off and allow the engine to cool before removing the radiator cap. Release the internal pressure by depressing the pressure relief. Unless the pressure is first released, removing the radiator cap will result in the hot coolant being expelled from the radiator. Serious scalding and burning can result. 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 three microns. 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 the safety procedures when performing service on these components. A caution decal is attached below the hydraulic tank oil level sight gauge. Check the oil level with the body down, engine stopped, and the key switch OFF.
Refer to the filling instructions outlined in Section 40, Lubrication and Service. Instructions are also out- lined on the following decal.