TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 8. On page 2-7, steps/tests relating to resolving the problem of loss of coolant are listed: Step 1. Pressurize coolant system and check for leaks at water pump and around cylinder heads. If any leakage is present, replace cylinder head gaskets, cylinder heads (para. 3-4 or 3-5) or water pump (para. 5-4). Step 2. Check cylinder block for cracks. Replace engine (para. 3-21) if cylinder block is cracked. In both steps you are referred to a detailed procedure in another chapter. When actually performing this task, you should refer to these paragraphs and complete the task as necessary. 9. In step 1, you check for leaks at the water pump and around the cylinder heads. There is no leakage present around the cylinder heads. You note leakage at the water pump. The water pump must be replaced or repaired. 10. In step 2, you check cylinder block for cracks. You do not find any cracks. 11. At this point, you refer to para. 5-4, a detailed procedure containing step-by-step instructions for accomplishing a maintenance task. However, some malfunction tests or inspections refer you to an entire system (for example: cooling system). For these tasks you must use the table of contents to locate the system and task you need to solve the problem. vi