OM2204 Warnings & Cautions - Section 22 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. Always turn the key switch off and allow the engine to cool before removing radiator cap. Unless the pressure is first released, removing the radiator cap after the engine has been running for a time will result in the hot cool- ant being expelled from the radiator. Serious scald- ing and burning can result. Warning plates are mounted on the frame in front of, and to the rear, of both front tires.
All personnel in this area are warned that the clearances change when the truck is steered and could cause serious injury. Warning plates are attached to both the hydraulic tank and fuel tank to alert technicians not to work on the truck with the body in the raised position unless body-up retention device (pins or cable) is in position. A plate on the side of the hydraulic tank furnishes instructions for filling the hydraulic tank. Keep the system open to the atmosphere only as long as absolutely necessary to lessen chances of system contamination. Service the tank with clean Type C-4 hydraulic oil. All oil being put into the hydraulic tank should be filtered through 3 micron fil- ters.