Fuel Pump: Service Precautions
FUEL HANDLING PRECAUTIONSThe following information provides basic precautions which must be observed if fuel is to be handled safely. It also outlines the other areas of risk which must not be ignored.
This information is issued for basic guidance only, and in any case of doubt appropriate enquiries should be made of your local Fire Officer.
Fuel vapor is highly flammable and in confined spaces is also very explosive and toxic.
When fuel evaporates it produces 150 times its own volume in vapor, which when diluted with air becomes a readily ignitable mixture. The vapor is heavier than air and will always fall to the lowest level. It can readily be distributed throughout a workshop by air current, consequently, even a small spillage of fuel is very dangerous.
Always have a fire extinguisher containing FOAM, CO2, GAS, or POWDER close at hand when handling or draining fuel, or when dismantling fuel systems, and in areas where fuel containers are stored.
WARNING:
- It is imperative that the battery is not disconnected during fuel system repairs as arcing at the battery terminal could ignite fuel vapor in the atmosphere. Always disconnect the vehicle battery BEFORE carrying out work on a fuel system.
- Whenever fuel is being handled, transferred or stored, or when fuel systems are being dismantled all forms of ignition must be extinguished or removed, any lead-lamps used must be flameproof and kept clear of spillage.
HOT FUEL HANDLING PRECAUTIONS
Before commencing any operation requiring fuel drainage from fuel tanks, the following procedures should be adhered to:
- Allow sufficient time for the fuel to cool, thus avoiding contact with hot fuels.
- Vent system by removing the fuel cap in a well ventilated area replace cap until commencement of tank drainage.
- Before disconnecting any part of the fuel system, it is vital to remove dirt, dust and debris from around components to prevent ingress of foreign matter into the fuel system. Cover the tank apertures after removal to prevent entry of dirt and escape of fuel vapors.
FUEL TRANSFER
CAUTION: Fuel must not be extracted or drained from any vehicle while it is standing over a pit.
The transfer of fuel from the vehicle fuel tank must be carried out in a well ventilated area. An approved transfer tank must be used according to the transfer tank manufacturer's instructions and local regulations, including attention to grounding of tanks.
FUEL TANK REMOVAL
A fuel vapor label should be attached to the fuel tank upon removal from vehicle. ENSURE TANK IS COMPLETELY DRAINED.
FUEL TANK REPAIR
Under no circumstances should a repair to any tank be attempted.
In addition to the above steps it is also recommended that you follow these basic steps.
WARNING: Adhere to the following procedures any time the fuel system is being worked on in order to reduce the risk of fire and personal injury:
- Keep a dry chemical (Class B) fire extinguisher near the work area.
- Place a "CAUTION FLAMMABLE" sign in the work area.
- Work in a well-ventilated area. Do not smoke, and keep sparks and open flames away.
- Wear eye protection.
- Use caution when working near the catalytic converter to prevent the possibility of burns or fire. (The temperatures within the converter can exceed 537 degrees C (1000 degrees F).)
- Relieve the fuel system pressure prior to disconnecting fuel system components.
- Disconnect the negative battery cable except for tests where battery voltage is required.
- Use a suitable container to store or catch fuel.
- Do not replace fuel pipe with fuel hose.
- Plug all disconnected fuel line fittings and hoses.
- After making any fuel system repairs ALWAYS inspect for fuel leaks.