NSTM 262 Flashcards
MIL-L17331 (2190)/MIL-H-17672 (2135) sampling shall be as follows:
a. Within 24 hours prior to start
b. Daily while operating (includes machinery in autostart configuration).
c. Upon receipt of oil.
d. Within a 24 hour period prior to each transfer.
e. When unusual operating conditions exist.
f. After an equipment casualty.
g. Test purifier discharge 30 minutes after starting, and at least once every four hours.
h. Equipment with sump capacities of 1 gallon or less shall not be sampled.
What is clear and bright?
Clear refers to the absence
of visible particulate matter. Bright refers to the absence of free water.
If free water is present and
the sample came from equipment without an online purification capability, what test do you conduct?
perform the Bottom Sediment and
Water (B.S.& W.)
If the sample is at operating temperature 53 ± 4°C (120 ± 5°F) and the sample
appears hazy, dissolved air or water may be present; what should you do ?
Allow the sample to settle at room temperature for 30
minutes.
If the sample continues
to appear hazy or cloudy after the 30 minute settle time at 120 degree what should you do?
the oil fails the bright criterion for online purification capability.
If the sample came
from equipment without online purification capability,-conduct
transparency test
If the sample is hazy not at operating temperature, what should you do ?
the sample shall be heated to 49 ± 3°C (120 ± 5°F) in a warm
water bath
If the equipment from which the sample was taken does not
have an online purification capability, and visible particles are observed in the sample, what should you do ?
perform the visible
sediment test in accordance with paragraph 262-5.1.3
What is the three test if sample fails clear and bright?
TRANSPARENCY, VISIBLE SEDIMENT, AND BOTTOM SEDIMENT AND WATER (BS & W)
TESTS.
What is the Transparency Test?
To perform the transparency test, hold a PMS card (or other card with standard
size print) behind the sample. If the printed words can be read through the sample, the oil passes the Transpar-
ency test and must be checked for the clear criteria in accordance with paragraph 262-5.1.2.1.6. If the card can-
not be read through the sample, the oil fails the Transparency test. Perform the BS & W test in accordance with
paragraph 262-5.1.3.3.
How do you conduct the visible sediment test?
- let the sample bottle stand for 10 minutes or until all of the sediment has settled to the bottom.
- Gently lay the sample bottle on its side for 10 minutes or until all visible sediment has accumulated along the intersection of the side (on which the bottle is laying) and the normal bottom of the bottle.
3.If a solid, unbroken line of sediment is observed along this intersection, or if individual particles greater than
1/8 inch along the largest axis are observed, a BS & W test shall be performed .
If a broken line of individual particles is observed, none of which is greater than 1/8 inch along
the largest axis, the sample passes the visible sediment test and is satisfactory for use in equipment without
online purification capability.
How do you conduct a BS and W?
- Obtain two clean, dry centrifuge tubes and fill each with 50 ml of well-shaken sample.
- Set the tubes in the test tube rack and fill each tube to the 100 ml mark with PD 680. Tightly cork each tube
and shake for 30 seconds to ensure adequate mixing of the oil and solvent. The cork shall be covered with a
thin plastic film (such as cellophane) so that it can be reused. - Place the centrifuge tubes securely on opposite sides in the centrifuge and whirl at 1500 rpm for 30 minutes.
- Remove the tubes and obtain the percent B.S. & W. by adding the readings of the two tubes.
For systems with online purification capability, the oil must meet the requirements of Clear and
Bright. If the lube oil fails the Clear and Bright criteria, how many hours the equipment can be operating?
the machinery may be operated for a period of 48 hours
while investigating for the cause of contamination, provided the oil can be purified while the machinery is in
operation
If the source of contamination cannot be identified within this 48 hours continued operation shall be obtained from ?
require authorization from the Commanding Officer.
What is NSTM 556?
Hydraulic Equip-
ment (Power Transmission and Control) .
What is NOAP?
Navy Oil Analysis Program (NOAP) is a preventive maintenance tool
that monitors the condition of equipment and oil through the routine analysis of oil samples drawn from Navy
What is NSTM 079 vol3?
NSTM Chapter 079, Volume 3, Damage Control - Engi-
neering Casualty Control.
What is NSTM 090?
Engineering logs
What is NSTM 079 (V1)
Damage Control-Stability and Buoyancy
What is NSTM 079 (V2)
Damage Control-Practical Damage
What is NSTM 079 (V3)?
Damage Control-Engineering Caualty control
