OIL ANALYSIS PROGRAM SAMPLING PROCEDURES
Active Army units shall sample engine oil at 50 hrs of operation or 90 days, whichever occurs first.
Reserves and National Guard units shall sample engine oil at 50 hrs of operation or 180 days, whichever occurs first.
For Active Army, Reserves, and National Guard, hydraulic oil shall be sampled once a year.
When the Army Oil Analysis Program (AOAP) or a lubrication note specifies that an engine oil or hydraulic oil sample
must be taken, use one of the following procedures:
ENGINE OIL SAMPLE
Remove the right access cover per TM 5-3895-373-10.
Ensure that the engine oil is up to operating temperature and engine is running per TM 5-3895-373-10.
Remove bleeder valve cap (1).
Open bleeder valve (2) and drain a minimum of 2 oz (59 ml) into a container. Release the valve and discard
waste oil in accordance with local procedures.
Place sample bottle per DA-PAM 738-750 under bleeder valve (2), open the valve and fill the sample bottle to
approximately 1/2 in. (1,3 cm) below the neck of the bottle. Release valve.
Install bleeder valve cap (1).
Install the right access cover per TM 5-3895-373-10.
Send the sample to the AOAP laboratory.
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