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Brake hydraulic fluid renewal (Every 36 000 miles (60 000 km) or 3 years)
1 An assistant and bleeding equipment will be needed. A considerable quantity of hydraulic fluid will be required - probably about 2 litres (nearly half a gallon). 2 Slacken the front wheel nuts. ...

Ford Sierra Service Manual
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Air filter maintenance
Refer to the scheduled maintenance guide for the appropriate intervals for changing the air filter element. When changing the air filter element, use only the Motorcraft air filter element listed ...