OM2044 Safety - Section 20 Page 20-15 Precautions With The Battery Before repairing the electrical system or when performing welding, turn the key switch to the OFF position. Wait two minutes after the engine has stopped, and if no warning lights illuminate, then turn the master disconnect switch (3, Figure 20-1) and starter disconnect switch (4) located in the isolation box (6) to the OFF position. When the switches are in the OFF position, LED lights (8) will be illuminated. Maintenance Near High Temperatures And High Pressures Immediately after stopping the truck, the engine coolant and operating oils are at high temperature and under high pressure.
In these conditions, opening the system or replacing filters 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 service manual. Rotating Fan And Belts Keep a safe distance from rotating parts such as the radiator fan and fan belts. Handling High Pressure Hoses 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. Serious bodily injury may result from direct or indirect contact with rotating parts and flying objects. Always repair any loose or broken hoses.
Fuel and/or oil leaks may result in a fire. Waste Materials Precautions With High Pressure Oil Never dump oil or other harmful fluids into a sewer system, rivers, etc. Always remember that work equipment circuits are always under pressure. Obey appropriate laws and regulations when disposing of harmful objects such as oil, fuel, coolant, solvent, filters, batteries, and others. DO NOT add oil, drain oil, or perform maintenance or inspections before completely releasing the internal pressure. Always put fluids drained from your machine in appropriate containers. Never drain fluids directly onto the ground. Small, high pressure pin-hole leaks are extremely dangerous.
The jet stream 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.