Checking and Adjusting Idle Speed (1985 models without idle speed boost)The engine should be at normal operating temperature. Oil temperature should be 140°F (60°C) minimum, or the cooling fan should have cycled on and off at least once. The cold start handle should not be pulled out, and all electrical accessories should be shut off. Engine speed on all 1985 diesels and turbo diesels should be 950 ± 30 rpm. To adjust, loosen the locknut, shown in Fig. 5-2, and turn the adjusting screw, clockwise to increase idle speed or counterclockwise to reduce idle speed. Lock the adjusting screw in place by tightening the locknut. Finally, check the accelerator cable adjustment as described in
5.2 Accelerator Cable.
|