94901-39160 WASHER, PLATE, SK Denso Cross

Introduction
Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.Safety Section
Due to chemical differences compared to diesel fuel, materials that are suitable for use with diesel fuel are not always suitable for use with biodiesel. The use of incompatible nonmetallic materials such as natural rubber material in hoses and o-rings can cause excessive swelling, degradation, and other problems that can result in internal and/or external fuel leaks. The use of incompatible metals such as zinc and copper can result in accelerated corrosion of those components. Also, incompatible metals such as zinc and copper accelerate the oxidation and degradation of the biodiesel. The degraded Biodiesel results in the formation of sediment that can clog fuel filters. Oxidized biodiesel is more prone to fuel system deposits in fuel pumps, injector orifice holes, and tips causing power loss and excessive black smoke. Due to an increasing amount of government mandates and customer interest, Tier 4 machines and engines must be compatible with blends of biodiesel up to 20% (B20). Additional compatibility up to B100 is desirable as the use of higher blends of Biodiesel is also common. Pre-Tier 4 machines and engines and machines without aftertreatment may use biodiesel blends >B20 if the quality and guidelines published by Caterpillar are followed. SEBU6250 provides detailed information for the use of biodiesel fuel.Prohibited Materials
Table 1 below, contains a list of prohibited materials that must not be used within the fuel system. This list should be considered when selecting and designing any fuel system components such as the fuel tank or fuel cooler. Particular care should be taken with the application of any plating and/or coatings that are used.Use of these materials may contaminate the fuel leading to choking of the injector nozzle.
Table 1
Prohibited Material Symbol
Lead Pb
Sodium Na
Calcium Ca
Zinc or Zinc Plating Zn
Copper Cu The following Recommend Zinc plates are only acceptable.
Zinc Phosphate: ASTM B117, D609
Zinc Chromate/Trivalent plates: ASTM 4042Required Parts
Table 2
Required Parts forD6R
Qty Part Number Description Former Part Number
393-7367 Fuel Filter and Lines Gp
1 New Part 1 Hybrid Line As 394-1514
394-1520 Tube As
124-2114 Coupling
456-8556 Hose
1 New Part 2 Hybrid Line As 284-9639
124-2114 Coupling
284-7651 Tube As
456-8556 Hose
1 New Part 3 Hose As 392-7972
124-2144 Permanent Coupling As
124-2323 Permanent Coupling
456-8556 Hose
1 321-8657 Elbow As 241-6215
2 250-1424 Elbow As 148-8378
1 370-6297 Connector As 148-8319
389-3250 Fuel Filter and Lines Gp
2 238-5080 O-Ring Seal 3K-0360
1 319-6225 Elbow As 148-8364
1 396-0382 Elbow As 150-3026
1 329-5511 Elbow As 148-8374
1 319-6228 Elbow As 148-8372
1 351-0264 Ball Valve 8T-6724
1 351-0265 Ball Valve 8T-6723
1 370-6299 Union As 164-5570
Table 3
Required Parts for D6R2
Qty Part Number Description Former Part Number
398-4334 Fuel Filter and Lines Gp
1 489-4042 Hose and Tube As 476-0068
1 489-4043 Hose As 476-0070
1 489-4044 Hose As 476-0071
398-4503 Fuel Lines Gp
2 238-5080 O-Ring Seal 3K-0360
1 319-6213 Connector As 148-8318
1 319-6217 Connector As 148-834