TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 402 of 1015
3-10. ENGINE
TM 9-2320-272-24-1
THIS TASK COVERS:
a Oil Sampling
c. Installation
b. Removal
INITIAL SETUP:
APPLICABLE MODELS
All
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
MATERIALS/PARTS
Bag, plastic (Appendix C, Item 11)
Bottle, oil sample (Appendix C, Item 12)
Hose (Appendix C, Item 34)
Sack, shipping (Appendix C, Item 60)
Gasket sealant (Appendix C, Item 30)
REFERENCES (TM)
LO 9-2320-272-12
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT CONDITION
Hood raised and secured (TM 9-2320-272-10).
Parking brake set (TM 9-2320-272-10).
Right splash shield removed
(TM
9-2320-272-10).
GENERAL SAFETY INSTRUCTIONS
Do not perform task when engine is hot, or drain
oil when hot.
Prevent spilling of oil. See Army POL (para. 1-8).
WARNING
Accidental or intentional introduction of liquid contaminants into
the environment is in violation of state, federal, and military
regulations. Refer to Army POL (para. 1-8) for information
concerning storage, use, and disposal of these liquids. Failure to do
so may result in injury or death.
NOTE
Sampling procedures are similar for M939/A1/A2 series
vehicles. This procedure is for M939A2 series vehicles.
Engine should be at operating temperature to ensure circulating oil
has reached a uniform consistency. Failure to allow engine to reach
operating temperature may result in inaccurate AOAP analysis.
1.
Start engine (TM 9-2320-272-10) and run until operating temperature is reached.
2.
Remove capnut (2) from oil sampling valve (1).
3.
Install rubber hose (3) on sampling valve (1).
NOTE
Perform step 4 to flush engine oil from oil sampling valve.
Have clean drainage container ready to catch oil that is flushed
for return to the engine. Do not use sample bottle.
4.
Open oil sampling valve (1) and drain 1 pt (0.473 L) of oil into clean drainage container.
5.
Close oil sampling valve (1).
6.
Return flushed oil to engine (LO 9-2320-272-12).
7.
Place sample bottle (4) under oil sampling valve (1) and place rubber hose (3) in oil sample
bottle (4).
8.
Open sampling valve (1) and fill oil sampling bottle (4) to within 0.5 in. (1.3 cm) from top of sample
bottle (4).
3-38
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