6.7 Unsuitable materials in the diesel fuel circuit Components made of copper and zinc materials The use of components made of copper and zinc materials in the fuel circuit is prohibited. They can cause chemical reactions in the fuel and thus lead to formation of a coating in the fuel system.
Requirements Based on current knowledge, the following materials and coatings must not be used in a diesel fuel circuit because negative mutual reactions can occur even with approved coolant additives.
Metallic materials • • • • • •
Zinc, also as surface protection Zinc-based alloys Copper Copper-based alloys with the exception of CuNi10 and CuNi30 (seawater cooler) Tin, also as surface protection Magnesium-aluminum alloy
Non-metallic materials • • • • •
Elastomers: Nitrile rubber, natural rubber, chloroprene rubber, butyl rubber, EPDM Silicon elastomer Fluorosilicone elastomer Polyurethane Polyvinyl
Information:
TIM-ID: 0000052849 - 001
In case of doubt about the use of materials on the engine and add-on components / components in coolant circuit, consultation with the respective MTU specialist department must be held.
A001061/37E 2016-12 | Fuels | 85
