Hydrofluoric acid
This highly toxic and corrosive substance is formed when certain types of synthetic rubber are heated above 400°C, which are used to make some o-rings, cuffs, fuel hoses, etc. The rubber chars or turns into a solid containing fluoric acid. This acid is very stable and does not decompose for years. When this acid gets on the skin, it is sometimes necessary to amputate the affected organ.
If you have to repair a fire-damaged machine or handle parts removed from such a machine, wear protective gloves and destroy them after work.
Battery
The battery contains sulfuric acid, which is extremely harmful to skin, eyes and clothing. Be careful when filling and carrying the battery.
Hydrogen that can be released from the battery is explosive. Do not use open flame and avoid creating sparks near the battery. Be careful when connecting and disconnecting the charger and other portable cords.
Air security bags
The air bag can cause injury if it is triggered unexpectedly. Be careful when removing the steering wheel and dashboard. Follow the instructions for handling the bag.
Diesel fuel equipment
The diesel fuel pump creates very high pressure. Be careful when working with the pump and nozzles.
Warning: Never expose your hand, face, or any other part of your body to a jet of fuel from the nozzle: fuel can penetrate the skin and be fatal.
Remember...
What to do
Protect your eyes when using power tools and when working under the machine.
Use gloves or protective cream if necessary.
If you are working alone, have someone check in from time to time to make sure you are all right.
Keep loose clothing and long hair away from moving machine parts.
Remove rings, watches, etc., before working on the vehicle, especially on wiring diagrams.
Before using lifting and supporting devices, make sure that they have sufficient strength for the intended work.
What not to do
Do not try to lift something that is beyond your capabilities - call an assistant.
Do not rush to finish the work - take breaks.
Do not use a defective tool as it may break and cause injury.
Do not scatter the tool on the floor around you - someone may trip on it. Wipe up spilled oil immediately.
Do not allow children and pets to play in or near the vehicle being worked on.