TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 12. EXCESSIVE FUEL CONSUMPTION; EXHAUST COLOR BLUE AND/OR EXCESSIVE SMOKE 1. Check for air cleaner restrictions and air cleaner indicator. 2. Inspect fuel lines, hoses, and connections for leaks and damage. 3. Inspect engine oil for presence of fuel. 1. If red appears at indicator window, inspect air intake for restrictions. If restrictions are not present, replace air cleaner element (WP 0052 00). 2. Reset air cleaner indicator (TM 9-2320-361-10). 1. Tighten any loose connections. 2. Repair or replace damaged components. If fuel is present in oil, remove fuel pump, drain system, and replace fuel pump (WP 0061 00). TM 9-2320-361-24-1 0006 00 0006 00-7 MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. EXHAUST COLOR BLUE DURING NORMAL OPERATION NOTE Blue exhaust indicates excess engine oil in cylinder combustion space. 1. Check that engine oil grade is correct for vehicle use and climatic conditions (WP 0020 00). 2. Check that engine fuel grade is correct for vehicle use and climatic conditions (TM 9-2320-361-10). 3. Inspect turbocharger for oil leaks into engine air intake or exhaust system. 4. Perform compression test (WP 0008 00, table 1, malfunction 11). If oil grade is incorrect, replace oil (WP 0020 00) and oil filters (WP 0044 00). If fuel grade is incorrect, drain complete fuel system and replace with correct grade of fuel (TM 9-2320-361-10). If oil leaks are found, replace turbocharger (WP 0057 00). Replace defective components identified by compression test. Table 2. Exhaust System Troubleshooting Procedures. Table 1. Engine Troubleshooting Procedures (Contd).