TM-9-2320-280-10 HMMWV Operator Manual Download
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TM 9-2320-280-10 3-17. ENGINE OIL SERVICING a. Raise and secure hood (para. 3-8). CAUTION Do not permit dirt, dust, or grit to enter engine oil dipstick tube. Internal engine damage will 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 the engine for one minute, shut down, wait one minute, and recheck oil level. • Vehicles equipped with deep 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 will result. c. If engine oil is low, remove oil filler cap (3) and add engine oil (Appendix G). CAUTION Install 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 (3), tighten securely, and wipe away any spilled oil. e. Lower and secure hood (para. 3-8). 3-22