Perkins 4006-23 Operation And Maintenance Manual page 46

46
Maintenance Section
Fuel Specifications
Perkins fuel cleaner will remove deposits that can
form in the fuel system with the use of biodiesel and
biodiesel blends. These deposits can create a loss of
power and engine performance.
Once the fuel cleaner has been added to the fuel, the
deposits within the fuel system are removed after 30
hours of engine operation. For maximum results,
continue to use the fuel cleaner for up to 80 hours.
Perkins fuel cleaner can be used on an on-going
basis with no adverse impact on engine or fuel
system durability.
Detailed instructions on the rate of which the fuel
cleaner must be use are on the container.
Perkins Diesel Fuel Conditioner
The Perkins Diesel Fuel Conditioner is the only fuel
conditioner recommended by Perkins. The diesel fuel
conditioner is a proprietary metal and ash free
formulation that has been extensively tested for use
with distillate diesel fuels for use in Perkins diesel
engines. The diesel fuel conditioner helps address
many of the challenges that various fuels worldwide
present with regarding fuel life/stability, engine
startability, injector deposits, fuel system life, and
long-term engine performance.
Note: Diesel fuel additives/conditioners may not
improve markedly poor diesel fuel properties enough
to make poor diesel acceptable for use.
Diesel fuel conditioner is a proven high performance,
multipurpose diesel fuel conditioner that is designed
to improve:
• Fuel economy (through fuel system cleanup)
• Lubricity
• Oxidation stability
• Detergency/dispersancy
• Moisture dispersancy
• Corrosion protection
• Cetane (typically 2-3 cetane numbers)
The diesel fuel conditioner also reduces the
formation of gums, resins, and sludge, and disperses
insoluble gums.
For maximum overall benefits, ask your fuel supplier
to add the fuel conditioner at the recommended treat
rate before fuel delivery. Or you may add the fuel
conditioner at the recommended treat rate during the
early weeks of fuel storage.
Contamination Control
Recommendations for Fuels
Fuels of "ISO 18/16/13" cleanliness level or cleaner
as dispensed into the engine or application fuel tank
should be used. This recommendation will help to
reduce power loss, fuel system failures and related
down time of engines. This cleanliness level is
important for new fuel system designs such as
common rail injection systems and unit injection
systems. Injection system designs utilize higher fuel
pressures and tight clearances between moving
parts to meet required stringent emissions
regulations. Peak injection pressures in current fuel
injection systems may exceed 30,000 psi.
Clearances in these systems are less than 5 µm. As
a result, particle contaminants as small as 4 µm can
cause scoring and scratching of internal pump and
injector surfaces and of injector nozzles.
Water in the fuel causes cavitation, corrosion of fuel
system parts, and provides an environment where
microbial growth in the fuel can flourish. Other
sources of fuel contamination are soaps, gels, or
other compounds that may result from undesirable
chemical interactions in the fuels, particularly in
ULSD. Gels and other compounds can also form in
biodiesel fuel at low temperatures or if biodiesel is
stored for extended periods. The best indication of
microbial contamination, fuel additives, or cold
temperature gel is rapid filter plugging of bulk fuel
filters or application fuel filters.
To reduce downtime due to contamination, follow
these fuel maintenance guidelines.
• Use high-quality fuels per recommended and
required specifications
• Fill fuel tanks with fuels of "ISO 18/16/13"
cleanliness level or cleaner, in particular for
engines with common rail and unit injection
systems. When you refuel the tank, filter the fuel
through a 4 µm absolute filter (Beta 4 = 75 up to
200) in order to reach the recommended
cleanliness level. This filtration should be at the
device that dispenses the fuel to the fuel tank. In
addition, filtration at the dispensing point should
remove water to ensure that fuel is dispensed at
500 ppm water or less.
• Perkins recommends the use of bulk fuel filter /
coalescer units which clean the fuel of both
particulate contamination and water in a single
pass.
SEBU9077-01