0326205 JOHNSON SPRING, Clutch

What is ULSD and how is it different from Low Sulfur Diesel (LSD)?The United States (U.S.) Environmental Protection Agency (EPA) defines Ultra-Low Sulfur Diesel (ULSD - S15) as a U.S. diesel fuel with a sulfur content not to exceed 15 parts per million (ppm) or 0.0015% by weight. Low Sulfur Diesel (LSD - S500) is defined as a U.S. diesel fuel with a sulfur content not to exceed 500 ppm or 0.05% by weight. The LSD fuel commonly available in North America normally does not exceed 350 ppm sulfur. Both ULSD and LSD should meet the fuel requirements outlined in "ASTM D975-07b".
Why is the sulfur content of diesel fuel in the U.S. reduced to 15 ppm?ULSD is required by U.S. EPA regulations for highway vehicles to ensure that these vehicles will meet emissions standards to improve air quality. In California, other properties of vehicular diesel fuel are also controlled to help reduce smog.
Can I use LSD fuel in model year (MY) 2007 or newer on-highway engines?On-highway diesel engines built in 2007 and later model years (U.S. EPA 2007 certified) must operate with ULSD fuel to comply with U.S. EPA regulations. Using LSD fuel in MY2007 and newer diesel engines powering on-highway vehicles is illegal and punishable with civil penalties. Fuel sulfur above 15 ppm can reduce the efficiency and durability of the engine. The potential impact may include permanent damage to the emissions control systems, reduced fuel economy and more frequent regeneration events. Engine failures that result from improper fuel usage are not Caterpillar factory defects and the cost of repair is not covered by a Caterpillar warranty.
How do I know if I have a MY2007 on-highway engine?Cat MY2007 Low Emission Engines can be identified with the following serial number prefixes:
C15: SDP1-UP
C13: LEE1-UP
C9: C9S1-UP
C7: C7S1-UPNote: The truck chassis model year may or may not correspond to the engine emissions model year. In some cases, a MY2006 emissions engine may power a MY2007 chassis model.The MY2007 engine is identified with specific labels that show the following:
Serial Number
2007 Engine Emissions LabelFuel labels incorporating the words "Ultra-Low Sulfur Diesel fuel" are attached by the truck manufacturer to the on-highway vehicle chassis at the following places:
Near the fuel tank(s) filler neck
Instrument panel (dashboard)
When will ULSD be available in the U.S. for MY2007 on-highway engines?The timeline proposed by the U.S. EPA states that ULSD fuel is expected to be available at most retail locations by 15October 2006.Note: In the U.S., diesel fuel classified as LSD fuel may still be sold at some retail locations outside of California during the 15October 2006 and 1December 2006 time period.
State of AlaskaFuel distributors in urban Alaska will follow the same transition schedule as the distributors in the rest of the U.S. for on-highway diesel fuel.Alaska has received an extension of the on-highway fuel 15 ppm maximum fuel sulfur requirement for rural areas (those areas not served by the Federal Aid Highway System). The 15 ppm maximum sulfur content diesel fuel must be in retail facilities in the rural areas by 1December 2010 for all of the following applications: highway, non-road, locomotive and marine diesel engines.All diesel fuel in Alaska remains exempt from the dyeing requirements in the U.S. EPA highway and non-road final rules.Source: U.S. EPA website: www.epa.gov
What are the Fuel Sulfur Regulations for Canada and Mexico?
CanadaCanada follows the same timeline and regulations as the U.S. where 15 ppm maximum sulfur fuel is available beginning 15October 2006.
MexicoThe Mexican government has drafted a regulation requiring ULSD fuel in Mexico beginning in September 2008, but the regulation has not been finalized. This could change when the new low-emitting vehicles begin to travel between Mexico and its northern neighbors. If there is no change in the situation, MY2007 U.S. vehicles (U.S. EPA 2007 certified) that enter Mexico will need to fuel up in the U.S., and it is possible that some fuel supplied by U.S. refineries could be stored in Mexico near major metropolitan areas for use under private, contractual arrangements.
Can ULSD be used in engines that were built before 2007?On-highway vehicles powered by MY2007 and newer low-emissions diesel engines (U.S. EPA 2007 certified) must use only ULSD fuel. Owners of MY2006 and older diesel engines may use ULSD or LSD fuel. In the U.S., only ULSD fuel will be available for on-highway use starting on 1December 2010.
Should I be concerned with the lubricity of ULSD?Diesel fuel lubricity is necessary to minimize wear on fuel pumps and injectors. ULSD fuel requires good lubricity and corrosion inhibitors in order to prevent unacceptable engine wear. In the U.S., as necessary, additives to increase lubricity and to inhibit corrosion will be added to ULSD fuel prior to its retail sale. With these additives, ULSD fuel is expected to perform as well as LSD fuel. All Cat electronic engines produced since MY2000 are qualified to run on ULSD fuel.Note: Have the fuel supplier confirm that the ULSD fuel available meets all "ASTM D975-07b S15" requirements.In North America, diesel fuel that is identified as "ASTM D975" Grade No. 2-D S15 or "ASTM D975" Grade No. 1-D S15 and meeting the "ASTM D975-07b" Thermal Stability Guideline X3.10.2.2 generally meet the "Caterpillar Specification for Distillate Diesel Fuel" requirements for ULSD fuel.
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In the U.S., how do I know if I am purchasing ULSD or LSD fuel?The U.S. EPA regulation concerning ULSD fuel requires that new labels be placed on every diesel dispenser in the U.S., excluding California, where LSD fuel is no longer available. The label should be located near the metering display showing how many gallons have been pumped into the diesel vehicle fuel tank. When the diesel fuel contains 15 ppm sulfur or less, the label will be titled "Ultra Low Sulfur Highway Diesel Fuel". With LSD fuel, the label will be titled "Low Sulfur Highway Diesel Fuel". Using LSD fuel in MY2007 and newer on-highway diesel engines (U.S. EPA 2007 certified) is illegal and punishable with civil penalties. In California, the state has mandated that ULSD be the only fuel available. Therefore, the U.S.