TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 Personnel Required: The number of personnel needed to perform a task. If only one mechanic is needed, this heading will not be used. NOTE If you think that you need more help to adequately or safely complete a task, perhaps as the result of unusual conditions, etc., alert your supervisor and ask for help. Manual References: Those TMs needed to complete the task. Equipment Condition: Notes the conditions that must exist before starting the task. If none are required, this heading will not be used. For oil cooler assembly replacement, the left-hand engine splash shield should be removed before we can start the task. If not already done, follow the procedure for splash shield removal in para. 10-17, before proceeding with this task. General Safety Instructions: Summarizes all safety warnings for the maintenance task. If none are required, this heading will not be used. 3. A step by step maintenance procedure follows the "INITIAL SETUP" and gives detailed instructions for the procedure. These instructions give the part’s general location and name and action performed. In the example, oil cooler assembly replacement -a. Removal, step 1 is "Disconnect engine oil cooler supply and return lines (7) from engine oil cooler ports (9)”. Note that the numbers in parenthesis correspond to the part’s callout number in the accompanying illustration. NOTE Warnings, cautions, and notes provide supplemental information: Warnings : Indicate conditions, practices, or procedures which must be observed to avoid personnel injury, loss of life, loss of life, or long-term health hazard. Cautions: Indicate condition, practices, or procedures which must be observed to avoid damage to equipment or destruction of equipment. Notes: Include essential information of special importance, interest, or aid in job performance which should be remembered and would be otherwise difficult to find or incorporate into the text. 4. At the end of a procedure, "FOLLOW-ON TASKS” will list those additional tasks that must be performed to complete the procedure. The Follow-On Tasks for oil cooler assembly replacement are: Ž Fill oil to proper level (TM 9-2320-280-10). Ž Install left-hand splash shield (para. 10-17). Ž Start engine (TM 9-2320-280-10) and check for leaks. e. Refer to the example pages for para. 3-8, Engine and Transmission Oil Cooler Assembly Maintenance, as we review the following points: 1. Modular Text: Both pages of text and illustrations are to be used together. This manual was designed so that the two pages would be visible at once, making part identification and procedure sequence easy to follow. 2. Initial Setup: Outlines task conditions. 3. Illustrations: An exploded diagram of the component shows part locations, attachments, and spatial relationships. Cutaway views (part of the vehicle is “erased”) show the location and orientation of screws and attachments. f. Your manual is easy to use once you understand its design. We hope it will encourage you to use your TM more often as an aid to maintenance support for M998 series vehicles. xi/(xii blank)