Instruction Masking of fuel and lube oil pipe con- nections (for classified engines only) The unions of pressurised oil and fuel pipes are masked with a protective tape. If this tape is removed during a repair, the unions must be masked with protective tape again after- wards. The following pipes are affected: Oil supply pipe to turbochargers Fuel pipes between supply pump, filter and injection pump Injection pipes protected against leaks 1 Fig. 1 A protective tape is wound around the unions. En- sure that there is 50 % overlap on every pass. Figs. 2−4 The unions to be masked must be clean and free of oil and grease. Do not apply the protective tape unless this is the case 2 3 4 3