26
Fluids & Lubricants
FUEL SPECIFICATION
The quality and grade of fuel can seriously affect the lubrication and overall service life of
the fuel injection pump. It is vitally important that the correct grade of fuel is used. Pre-
filters and water separators must be checked daily and cleaned if necessary.
ACCEPTABLE FUELS
No warranty liability whatsoever will be accepted for failure of injection
equipment where the failure is attributed to the quality and grade of fuel
used.
Only the following types of fuel are considered acceptable by NC
•
EN590 Diesel fuel types (Auto/C0/C1/C2/C3/C4)
•
French EN590 (RME5) with 5% maximum
•
RME content blended with mineral derived diesel
•
BS2869 Class A2
EFFECT OF FUEL CONTAMINANTS
DIRT: A severely damaging contaminant. Finely machined and mated surfaces such as
delivery valves and distributor rotor are susceptible to the abrasive nature of dirt particles.
Increased wear will almost certainly lead to greater leakage, uneven running and poor fuel
delivery.
WATER: Water can enter the fuel through poor storage or careless handling and will
condense in fuel tanks. The smallest amounts of water can result in effects that are just as
disastrous to the fuel injection pump as dirt, causing rapid wear, corrosion, and in severe
cases even seizure. It is vitally important that water is prevented from reaching the fuel
injection equipment. The filter/water trap must be inspected daily and drained if necessary.
1st Fuel filter/Water trap
2nd Fuel Filter
WAX: Wax is precipitated from diesel fuel when the ambient temperature falls below that of
the fuels cloud point, causing a restriction in fuel flow, resulting in rough engine running.
Special winter fuels may be available for engine operation at temperatures below 0°C. These
fuels have a lower viscosity and limit wax formation.
If water trap is full of water, the 2nd fuel filter
must also be drained.
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