TM-9-2320-387-10 HMMWV Operator Manual Download
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TM 9-2320-387-l 0 1 3-l 8. ENGINE OIL SERVlClNd a. Raise and secure hood (para. 3-9). CAUTION Do not permit dirt, dust, or grit to enter engine oil dipstick tube. Internal engine damage may result if engine oil becomes contaminated. NOTE Engine oil level is checked with engine off. If oil level checks above FULL, it may be due to oil cooler drain- back. Operate engine for one minute, shut down, wait one minute, and recheck oil level. If it still checks above full, drain oil to obtain correct level. Vehicles equipped with deep water fording kit will have a sealed dipstick. b. Pull out dipstick (1) and check for proper oil level. Level should be at crosshatch marks (2) between FULL and ADD 1 QT. CAUTION Do not overfill engine crankcase. Damage to engine may result. c. If engine oil is low, remove oil filler cap (3) and add engine oil (appendix G). CAUTION Use a non-vented filler cap only. An incorrect filler cap will not seal properly, causing water to enter and damage engine. d. Replace oil filler cap (31, tighten securely, and wipe away any spilled oil. e. Lower and secure hood (para. 3-9).