OM2041 9/09 Safety - Section 20 Page 20-13 Radiator Coolant Level Precautions When Performing Maintenance Near High Temperature Or High Pressure If it is necessary to add coolant to the radiator, stop the engine and allow the engine and radiator to cool down before adding the coolant. Depress the pressure release button on the cap to vent cooling system pressure. Slowly loosen the cap to relieve any remaining pressure. Immediately after stopping operation, engine coolant and operating oils are at high temperature and under high pressure. If the cap is removed, the oil or water is drained, or the filters are replaced under these conditions, it may result in burns or other injury.
Wait for the temperature to cool and pressure to subside before performing the inspection and/or maintenance as outlined in the shop manual. Use Of Lighting When checking fuel, oil, coolant or battery electrolyte, always use lighting with anti-explosion specifications. If such lighting equipment is not used, there is danger of an explosion. Precautions With High Pressure Oil Work equipment circuits are always under pressure. Do not add oil, drain oil or perform maintenance or inspections before completely releasing the internal pressure. Small, high-pressure pin hole leaks are extremely dangerous. The jet of high-pressure oil can pierce the skin and eyes.
Always wear safety glasses and thick gloves. Use a piece of cardboard or a sheet of wood to check for oil leakage. If you are hit by a jet of high-pressure oil, consult a doctor immediately for medical attention. Precautions With The Battery When repairing the electrical system or performing electrical welding, remove the negative (-) terminal of the battery to stop the flow of current. Waste Materials Never dump oil into a sewer system, river, etc. Always put oil drained from your truck in appropriate containers. Never drain oil directly onto the ground.
Handling High Pressure Hoses Obey appropriate laws and regulations when disposing of harmful objects such as oil, fuel, coolant, solvent, filters and batteries. Do not bend high pressure hoses or hit them with hard objects. Do not use any bent or cracked piping, tubes or hoses. They may burst during use. Always repair any loose or broken hoses. If fuel or oil leaks, it may result in a fire.