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The Generator Needed a Full Thermal Cycle to Show the Fault A standby diesel generator maintained at a facility in Tonga started easily from cold and initially operated with normal idle quality. After reaching full operating temperature, however, the engine began showing uneven idle behaviour and ...
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The Replacement Injector Did Not Change the Idle Complaint A city bus serviced in the Republic of the Congo developed rough idle, uneven combustion and light exhaust smoke during extended urban operation. Diagnostic information initially suggested that one or more cylinders were contributing ...
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Why the Problem Appeared to Be Injector-Related A mining maintenance team in Mali investigated a haul truck that started normally and produced acceptable engine response during the first part of each shift. After prolonged loaded operation, however, the truck gradually lost pulling power. Reducing ...
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The Fault Appeared After Pressure-Control Service A piece of construction equipment serviced in Chad developed a new common-rail complaint after work had been performed on the fuel metering valve. The engine could idle normally, but rapid acceleration sometimes produced a sharp rail-pressure ...
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A mechanically governed diesel generator used on a construction project in Comoros had difficulty maintaining engine speed as electrical demand increased. The mechanical injectors were removed and calibrated. Opening behaviour, spray and sealing were checked before the set was reinstalled. At no ...
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A New Washer Failed to End the Leakage Pattern A generator workshop in São Tomé and Príncipe serviced a diesel engine after combustion residue appeared around one injector. The injector was removed, the seating area was cleaned and a new sealing washer was fitted. The injector itself was also ...
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The Pattern Extended Beyond One Engine A transport workshop supporting a commercial fleet in South Sudan began seeing similar internal wear patterns across diesel injectors removed from several vehicles. The first failures were treated as normal component wear. As additional engines showed ...
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Normal Injector Tests Did Not Explain the Fluid Problem A diesel generator maintained in Vanuatu developed unusual contamination around the cylinder-head injector area together with signs that prompted closer inspection of the cooling system. The injectors were removed and tested. Their hydraulic ...
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One Temperature Reading Nearly Led to an Injector Replacement A marine workshop in the Solomon Islands investigated a workboat diesel engine after technicians recorded a lower exhaust temperature near one cylinder with an infrared thermometer. The engine also had a mild unevenness at certain ...
Cases
