AOAP are equipped with a special sampling valve to simplify sample taking. These valves are
installed according to instructions found in the equipment technical manual. To take a sample
with a valve, you may need to start the engine to pressurize the system. Once the oil starts to
flow, flush a small amount of oil from the line to clear out contamination. Then fill the sample
bottle from the valve.
(1) Sampling from equipment that has no sampling valve takes more time. First, cut the
(2) Loosen the T-handle on the pump. Insert the plastic tubing about 2 inches into the
bottle. Tighten the T-handle just enough to grip the tubing firmly.
(3) Remove the filler cap or dipstick from the oil reservoir. Insert the tubing into the
reservoir, but be careful not to let tubing touch bottom. If the tube touches the bottom, sludge
will be picked up, and the laboratory will request another sample.
(4) Pull the pump handle out slowly. Oil should flow into the sample bottle. Fill the
sample bottle to the bottom of the neck or about 1/2 inch from the top of the bottle.
(5) Push the vacuum release button when you have enough oil. Do not let oil get into the
pump. If oil does get into the pump, take the pump apart and clean each piece thoroughly with
appropriate cleaning solvent. Let it air dry.
(6) Remove the tubing from the dipstick opening. Unscrew the sample bottle and replace
the bottle cap. Use a clean rag or tissue to wipe off any oil on the tip of the tube. Then pull
the tube out of the pump head and discard the tubing.
(7) Whether you take your sample by valve or pump, enter the end item and component
serial numbers on the sample bottle and complete the DD Form 2026 or ULLS DA Form 5991-
E. Then get the sample, along with the form, to the TAMMS clerk for processing. The TAMMS
clerk will see that it is sent to your laboratory by the fastest means available.
(8) Replacement parts for the oil-sampling pump are provided in table 5.