PREVENTIVE MAINTENANCE CHECKS AND SERVICES Continued
Open sample valve on engine oil filter and drain a small amount of oil into a container to clear valve of grit and
contamination. (Properly dispose of container and oil upon completion of sample taking.) Fill sampling bottle to the neck
shoulder and seal it. Attach DA Form 2026 to sampling bottle.
Close oil sample valve and install dust cap.
Take oil sample from transmission in the same manner (see previous three steps).
Stop engine (WP 0023 00), (WP 0024 00).
Lower crew seat and center floor plate (WP 0077 00).
Deliver sample bottles to the unit AOAP monitor.
For location of nearest AOAP Laboratory and complete information about AOAP, refer to TB
43-0106. Oil filters shall be serviced/cleaned/changed as applicable, when: (a) They are known
to be contaminated, or clogged; (b) Service is recommended by AOAP Laboratory analysis, or
(c) At prescribed hard time intervals.
If engine/transmission has been filled with preservation oil, leave this oil in engine/transmission until first scheduled oil
change. Maintain operating oil level by adding applicable grade oil (OE/HDO or OEA). When first scheduled oil change is
due, notify unit maintenance to refill engine/transmission with applicable grade of oil. See Lubrication Tables below.
Lubrication intervals will be indicated by one of the following symbols:
OC = AOAP On-Condition
B = Before
D = Daily
AF = After
W = Weekly
M = Monthly
S = 1,500 miles (2,400 km), Semi-annually
AN = Annually