NHTSA ID Number: 10183466
Manufacturer Communication Number: IK1500074
TSB/Document Date: 2020-12-02
Summary
Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
IK1500074 - Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
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Title : Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
Applies To : Cummins Engines
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
11/17/2020 Articel updated to include B6.7
02/01/2019 - Auther corrected 3379001 link for feedback Purposes
01/23/2019 - Author updated for feedback purposes
04/03/2018 - Author updated for feedback purposes
11/24/2014 - Added Feature Code 15LMJ
Introduction
The purpose of this article is to help the user understand proper fuel selection and problems associated with fuel. This
article covers the requirements of filtration and general maintenance guidelines, issues with winter fuel, blending fuel with fuel,
winter fuel additives, and optional fuel heaters.
NOTE: This article contains static information from February 24, 2014. For further and perhaps more current
information about Cummins Inc. Fuel recommendations and specifications, see Cummins
Service Bulletin 3379001.
Fuel Cleanliness
This section explains the importance of fuel cleanliness to the successful operation of Cummins® Engines.
Modern fuel systems have been developed to reduce emissions and fuel consumption, and improve engine performance. These
high-pressure systems operate at pressures approaching 2100 bar [30,500 psi] and with component match clearances typically
from 2 to 5 microns for injectors. At these pressures, very small, hard particles are potential sources of fuel system malfunction.
Excessive contamination of diesel fuel can cause premature clogging of diesel fuel filters and/or premature wear of critical fuel
injection system parts. Depending on the size and nature of the particles, this can lead to:
• Reduced component life.
• Component malfunction.
• Fuel system and/or engine failure.
Fuel Filters
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Cummins® engines are supplied with the latest in fuel filtration technology from Cummins Filtration™. These systems are
designed to remove water and other harmful particles from the fuel before they damage the fuel pump and other engine
components.
The fuel system requires the use of two fuel filters. The suction side filter must have the
following characteristics as of February 24, 2014:
•
•
•
•
•
Water-separating
10-micron rating
Water-in-fuel sensor with shunt resistor
Water drain valve
Engine or chassis mounted.
The pressure side filter must have the following characteristics as of February 24, 2014:
• 5-micron rating
• Engine mounted.
Use the following procedure for fuel filter recommendations. Refer to Procedure 018-024
in Section V.
For further information about Cummins Inc. suction fuel filter micron rating requirements and specifications, see 006066 Fuel Filter Suction in Section 4 of ISX15 CM2350 X101 Operation and Maintenance Manual.
Fuel Filter Maintenance
Fuel filters must be changed periodically to prevent restriction of fuel flow from the fuel tank to the fuel pump. Fuel restriction will
increase over time as sediment gets collected in the filter media. Sediment could possibly consist of rust, dirt, dust, oxidation
products, and biological growth.
Change fuel filters as recommended by the appropriate Cummins® Engine Owner's Manual or Operation and Maintenance
Manual. When operating under severe conditions, additional fuel filter changes can be required. To determine if this is
necessary, fuel filter restriction must be checked. Refer to the appropriate Cummins® Engine Service Manual for fuel filter
restriction checking procedures. After checking the restriction a few times, a maintenance schedule for fuel filter changes can be
established for each type of operation.
Common Issues With Winter Fuel
This section presents the various winter fuel issues and methods of dealing with them.
Two winter fuel handling issues, wax and ice, have annoyed diesel operators for years. There is no solution to either of these
problems that is ideal for all situations, but the better the problem is understood, the less difficult the process of finding a solution
becomes. Determining whether a low power complaint is due to a fuel filter plugging complaint is fairly simple: replace the fuel
filter with a new filter. If this allows the vehicle to operate normally even for a short period of time, then obviously something in
the fuel is plugging the filter and causing the complaint. A simple way of determining whether the filter plugging is caused by wax
or ice is to bring the plugged filter into a warm shop, drain out the liquid fuel, place the filter upside down on a piece of paper or
in a shallow pan, and allow the filter to warm to room temperature. If there is ice in the filter, it will melt and run out of the filter
and the water on the paper or in the pan will be obvious. Most petroleum wax, on the other hand, will not melt at room
temperature. To speed the analysis process, the filter can be cut open and spread out. Once the cause of the low power
complaint is determined, a logical solution can be chosen.
Fuel Wax
All middle (or intermediate) distillate fuels, such as jet fuels, heating fuels, and diesel fuels, contain paraffin wax. Paraffin wax is
a solid, crystalline mixture of straight-chain or normal hydrocarbons melting in the approximate range of 40 to 60°C [104 to 140°
F]. This paraffin wax occurs naturally in the crude oil from which fuel oils are distilled. The wax content of a distillate fuel varies
greatly, depending on the crude oil from which the fuel is produced and in the processing of the fuel. Generally, higher boiling
distillate fuels, such as U.S. Number 2-D diesel fuel, have a higher concentration of paraffin wax than lower boiling distillate
fuels, such as jet fuel.
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Because of the strong relationship between temperature and solubility of wax, wax separation is a problem in handling and
using diesel fuel during cold weather. As fuel cools, a temperature is reached at which the soluble paraffin wax in the fuel begins
to come out of solution (Cloud Point); any further cooling will cause wax to separate out of solution. The temperature at which a
certain fuel will become saturated with wax and causes filter plugging problems is termed the Cold Filter Plugging Point (ASTM
D6371). The temperature at which fuel will no longer flow is the Pour Point (ASTM D97). At the pour point, most of the fuel is still
liquid, although it is very thick or viscous and trapped in a honeycomb-like network of wax crystals.
Since diesel powered equipment is frequently used at temperatures low enough to cause wax to separate, a number of
techniques have been devised to prevent the wax from causing problems by plugging fuel screens, lines, filter, and so on, and
preventing fuel flow to the engine. Vehicles designed to operate at very low temperatures have provisions for heated fuel tanks,
insulated fuel lines, heated fuel filters and other mechanisms to warm the fuel so that the wax does not separate. These more
elaborate systems are usually not practical in more temperate climates where they are needed only a few days a year.
Fuel Blending
There are two different types of fuel blending processes referred to in this section. The first is the blending of used engine
lubricating oil to reduce fuel costs and to aid in disposing of used engine oil. This section also discusses the blending of fuel and
engine oil in on-highway applications. The second is the blending of heavier fuels with lighter fuels to lower the wax content,
cloud point, and pour point, and thus improve cold weather operation. In addition, the effects and hazards of mixing alcohol with
diesel fuel are discussed.
Blending Fuel with Fuel
This section presents the effects of blending fuels with other fuels. Biodiesel fuel blends, used and new lube fuel blends, and
gasoline, gasohol, or alcohol fuel blends are discussed in a separate section of this service bulletin (Cummins Service Bulletin
3379001).
Cummins Inc. recommends the use of a premium diesel fuel during winter (ambient conditions at -7°C or 20°F or below)
operating conditions. Blended fuel must meet the specifications in Table 1: Cummins Inc. Required Diesel Fuel Specifications.
See the Additives section in this service bulletin.
In coldweather operation, the most common method of preventing fuel waxing problems is to dilute heavier, higher wax content
fuels such as diesel number 2 (D2) with lighter, lower wax content fuels such as diesel number 1 (D1) or jet fuel. This reduces
the concentration of wax and thereby reduces both the cloud point and pour point. Blended fuels of this nature are more
expensive to use both because they cost more and because they have a lower thermal energy content. A typical blended fuel
contains 30 to 60 volume-percent light distillate fuel, usually yielding a 3 to 7°C or 5.4 to 12.6°F drop in cloud point, and a 5 to
11°C or 9 to 20°F drop in pour point. Lower wax content fuels must be added BEFORE wax forms to be effective.
Cummins Inc. Required Diesel Fuel Specifications
This section presents the Cummins Inc. required fuel specifications.
Fuels meeting national and international specifications can be used if they observe the specifications listed in Table 1: Cummins
Inc. Required Diesel Fuel Specifications. Cummins® engines will operate satisfactorily on fuels meeting all the properties listed
in Table 1; however, fuels meeting only the required specifications will not give the same level of performance, efficiency,
reliability, or maintenance costs as premium fuels.
Table 1: Cummins Inc. Required Diesel Fuel Specifications1.
Viscosity
1.3 to 4.1 centistokes at 40°C [104°F]
Cetane Number
42 minimum above 0°C [32°F]; 45 minimum below 0°C [32°F] 2
Sulfur Content
Reference Procedure 018-002 (Fuel Recommendations and Specifications) in Section V of the
appropriate Owner’s Manual, and/or warranty documentation for specific fuel sulfur content
requirements.
Active Sulfur
Copper Strip Corrosion not to exceed Number 3 rating after 3 hours at 50°C [122°F].
Water Sediment
Not to exceed 0.05 volume-percent.
Carbon Residue
Not to exceed 0.35 mass-percent on 10 volume-percent residuum
Density
0.816 to 0.876 grams per cubic centimeter (g/cc) at 15°C [59°F].
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Table 1: Cummins Inc. Required Diesel Fuel Specifications1.
Cloud Point
6°C or 11°F below lowest ambient temperature at which the fuel is expected to operate.
Ash
Not to exceed 0.02 mass-percent. For vehicles equipped with exhaust aftertreatment, there shall be no
detectable ash in the fuel.
Distillation
10 volume-percent at 282°C [540°F] maximum, 90 volume-percent at 360°C [680°F] maximum, 100
volume-percent at 385°C [725°F] maximum. The distillation curve must be smooth and continuous.
Lubricity (HFRR) or
(SLBOCLE)
High Frequency Reciprocating Rig (HFRR): Maximum of 0.52 mm [0.020 in] Wear Scar Diameter
(WSD) at 60°C [140°F].
Scuffing Load Ball-on-Cylinder Lubricity Evaluator (SLBOCLE): Minimum of 3100 grams.
1. In addition to the requirements in Table 1, Cummins Inc. strongly recommends the use of fuel with particle counts less
than the ISO 4406 code of 18/16/13. Reference the “Fuel Cleanliness” section of the service bulletin (Cummins Service
Bulletin 3379001)for more details.
2. Fuel must observe proper flash point requirements to satisfy local safety regulations.
3. Regional, national, or international regulations can require a lower sulfur content than what is listed in Table 1.
Fuel Additives
This section gives information on the use of fuel additives in Cummins® engines.
Cummins Inc. neither approves nor disapproves of the use of any fuel additive, fuel extender, fuel system modification, or the
use of any device not manufactured or sold by Cummins Inc. or its subsidiaries. Engine damage, service issues, or performance
problems that occur due to the use of these products are not considered a defect in workmanship or material as supplied by
Cummins Inc. and can not be compensated under the Cummins Inc. warranty.
There are a number of fuel additives available which reduce the pour point and cold filter plugging point (CFPP) of diesel fuel.
These are commonly referred to as pour point depressant additives, cold flow improver additives, wax crystal modifiers, or
fluidity improver additives (and can be collectively termed “Winter Additives”). Certain additives can reduce the Pour Point by as
much as 21°C [70°F] and the CFPP by as much as -1°C [30°F]. A survey of winter blend fuels by the Bureau of Mines (now a
part of the Energy Research and Development Administration) revealed that a large percentage of the commercially marketed
diesel fuels had been treated with a winter additive. Before purchasing such an additive to treat fuel, ask the fuel supplier
whether the fuel already contains a winter additive. Depending on the amount and type of additive already in the fuel, additional
additives will or will not be necessary.
These additives alter the size and shape of wax crystals, allowing pumping of fuel at lower temperatures. Although certain
additives can be very effective, they are not a cure all. Their performance varies depending on the paraffin type and content of
the fuel treated. Severe weather applications can require fuel warmers in addition to additives. Although other additives are
available that can provide some benefits, Cummins Filtration™ Fleet-tech™ Winter Conditioner and Turbo Diesel All Season
Fuel Additives are the only fuel additives recommended by Cummins Inc. to help prevent filter gelling in cold weather
applications.
Cummins® engines are designed, developed, rated, and built to operate on commercially available diesel fuel as listed
in Table 1: Cummins Inc. Required Diesel Fuel Specifications; therefore, it is not our policy to recommend fuel
additives.
In certain situations, when available fuels are of poor quality or problems exist which are peculiar to certain operations, additives
can be used. However, Cummins Inc. recommends consultation with the fuel supplier or Cummins Inc. Service Engineering
Department prior to the use of fuel additives.
Among the situations where additives can prove useful are the following:
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IK1500074 - Fuel Filters, Winter Additives, and Blending Fuels for Cummins® Engines
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1.
Cummins Filtration™ Winter Conditioner, and Turbo Diesel All Season Fuel Additive can be used to improve the pour
point and cold filter plugging point of diesel fuels in addition to preventing ice formation in wet fuels during cold storage.
Although other additives are available that can provide some winter performance benefits, Cummins Filtration™ Winter
Conditioner and Turbo Diesel All Season Fuel Additive are the only diesel fuel additives approved by Cummins Inc. for
winter performance improvements.
2.
Cummins Filtration™ Asphaltene Conditioner and Cummins Filtration™ Turbo Diesel All Season Fuel Additive can be
used to clean carbon deposits from injectors and improve lubricity in fuels that fall below the recommended lubricity
specification in Table 1: Cummins Inc. Required Diesel Fuel Specifications. Although other additives can provide some
performance benefits, Cummins Filtration™ Asphaltene Conditioner, and Turbo Diesel All Season Fuel Additive are the
only diesel fuel additives approved by Cummins Inc. for use with fuels that do not meet the lubricity specification in Table
1.
Premium diesel fuels can possibly contain several additives that can accomplish the same as buying additives and adding them
to lower quality diesel fuel. Cummins Inc. recommends the use of a premium diesel fuel during winter (ambient conditions at -7°
C or 20°F or below) operating conditions.
CAUTION
Over use of fuel additives can cause adverse effects such as fuel filter plugging and reduced aftertreatment life.
NOTE: Cummins Inc. accepts no liability for engine damage resulting from the use of fuel additives that are not
specifically approved. Consult your fuel supplier for guidance on additive use.
Standard and Optional Suction Fuel Filter Heaters
Heating diesel fuel just prior to filtration is an excellent method of preventing fuel filter plugging. If cold fuel is warmed
sufficiently, the wax crystals will dissolve in the fuel. The dissolving requires warming to a temperature of approximately 11 to
22°C or 20 to 40°F above the fuel's cold filter plugging point.
In order for a fuel heater to reliably prevent fuel filter plugging due to wax, it must be capable of supplying enough heat to the
fuel at the maximum fuel flow (not just fuel consumption) rate to raise the fuel temperature from the lowest expected fuel
temperature (probably the lowest expected ambient temperature) to 11 to 22°C or 20 to 40°F above the fuel's cold filter plugging
point.
Navistar, Inc. offers different styles of suction fuel filter modules and different style heating elements please refer to the CT400
manual for details on each option avaialble.
For further information about Cummins Inc. Fuel recommendations and specifications, see Cummins Service Bulletin
3379001.
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Comments
You received the following feedback From: DY08955 - David Gabrielle Email Address: [email protected] Job Classification: SE008,
Service Technician Dealer: TRUCK KING INTL IDEALEAS Feedback: Please add the part numbers for the Cummins recommended fuel
additives. Will these additives be available through the PDC ?
Created
Date
11/24/2020
5:51:19 AM
Copyright © 2020 Navistar, Inc.
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