TM 10-3930-669-20 3-5.  ENGINE OIL FILTER ADAPTER ASSEMBLY REPLACEMENT/REPAIR (CONT). (20) Unlock two latches (55) and open left hand rear access cover (56). (21) Remove cap (57) from engine (22). (22) Add engine oil until oil level is indicated on the dipstick (54) between oil level marks. (23) Close engine access panel (53). (24) Close cab door (52). (25) Install cap (57) on engine (22). (26) Close left-hand rear access cover (56) and lock two latches (55). NOTE Follow-on Maintenance: •       Remove   wheel   chocks (TM 10-3930-669-10). END OF TASK 3-22