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2.31. check of system of supply of hot air

1. Disconnect an air hose from a reception branch pipe of the air filter. Start the engine and watch the gate by means of a pocket mirror through an opening in a branch pipe. When the engine cold, the gate has to be closed and not pass external air. When the engine gets warm, the gate has to fall, passing air through an opening of a reception branch pipe.

30.3 By means of a pocket mirror check operation of the gate regulating temperature of the arriving air

1. Pocket mirror
2. The gate regulating temperature of the arriving air