Covering the politics, Business and technology of defense - Subscribe Today
TM-9-2320-361-24-1 Page 135

TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

Page 135 of 1176


Download
TM 9-2320-361-24-1 0008 00 0008 00-7 MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 11. EXHAUST COLOR BLUE DURING NORMAL OPERATION (Contd) 3. If one or more cylinders have an 8–10% or greater loss in both wet and dry tests then compression loss is on top of engine. Remove head(s) and inspect valves, valve seats and guides, and cylinder head gasket(s). 4. If steps 2 and/or 3 do not sufficiently restore engine to normal operation, remove rocker arm covers (WP 0030 00), inspect for camshaft, tappets, and pushrod defects. 5. If compression test readings are within limits for all cylinders and engine develops normal power but still shows blue exhaust. Test 3. Perform engine oil consumption test. 1. Operate vehicle and closely check engine oil level unit until oil level reaches one quart low. Stop vehicle operation. 2. Record vehicle mileage. Calculate engine oil consumption by subtracting mileage when engine oil level was topped off from current mileage recorded when engine oil level is one quart low. The difference is the mileage using one quart of oil. 3. Repeat steps 1 and 2 of engine oil consumption test. If oil consumption is not acceptable. Repair or replace defective components (WP 0027 00 and TM 9-2815-210-34-2-2). Repair or replace defective parts (WP 0031 00, and WP 0034 00 or TM 9-2815-210-34-2-2). Remove cylinder head (WP 0027 00) and replace valve seals and guides (WP 0443 00). 1. If engine oil consumption remains less than 60 mi. (96 km) for one quart of oil, check all seals. 2. If there are no leaks, proceed to step 3 of test 3. 1. If engine oil consumption remains less than 60 mi (96 km) for one quart of oil, check all seals. 2. If engine oil consumption is greater than or equal to 60 mi (96 km) for one quart of oil, oil consumption is acceptable. No further action required. 1. If engine oil consumption remains less than 60 mi (96 km) for one quart of oil, check all seals. 2. If engine oil consumption is greater than or equal to 60 mi (96 km) for one quart of oil, oil consumption is acceptable. No Table 1. Engine Troubleshooting Procedures (Contd).