TABLE 2-4. NONAERONAUTICAL EQUIPMENT LUBRICANT SAMPLE ANALYSIS REQUIRMENT GUIDE

NAVAIR 17-15-50.4

TM 38-301-4

T.O. 33-1-37-4

CGTO 33-1-37-4

TABLE 2-4. NONAERONAUTICAL EQUIPMENT LUBRICANT SAMPLE

ANALYSIS REQUIRMENT GUIDE

The sequence of the following tests is provided as a guide, not as mandatory requirements for all services.

ENGINES

Spectrometric

1. Pass - Go to I.B.

2. Fail - See wear-metal guidelines for specific equipment

a. Critical - Resample to verify

(1) Wear-Metals - abnormal or high range

(2) Oil contamination by dirt or dust - Si increase

b. Noncritical - Resample to verify, then change oil

(1) Oil contamination by dirt or dust - Si increase

(2) Additive depletion - Zn, Mg, or Cu decrease

(3) Coolant problem - B or Na increase by 20 PPM or more

Viscosity

1. Pass - Go to I.C.

2. Fail - See viscosity guidelines

a. Low - Fuel dilution or wrong oil. Verify by flashpoint test and change oil.

If repeat problem, make maintenance recommendation for fuel dilution.

b. High - Soot, sludge, water or wrong oil. Verify by blotter and water tests

and change oil.

Blotter

1. Pass - Go to I.D. or I.E.

2. Fail - See blotter test instructions in Vol II, para 4-4.b.

a. Contaminated oil - Soot or water is present. Verify by water (crackle or

KF) test and change oil

b. Additive depletion - Spot has poor dispersancy. Verify by spectrometric

Analysis (large decrease in Zn, Mg, or Cu) and change oil.

Crackle Test for Water

1. Pass - Go to I.E. if quantitative degree of water content required (optional).

2. Fail - See crackle test instructions in Vol II, para 4-4.d.(1).

a. Free water - Change oil.

b. Coolant leak - Verify by spectrometric (B or Na increase by 20 PPM or more) and change oil.

c. Dissolved water - Verify by KF test and consult guidelines.

Karl Fischer Test for Water

1. Pass

2. Fail - See guidelines, Vol II, para 4-4.d. (2).

Fourier Transform Infrared (FT-IR) Spectrometric Analysis Results

1. Pass

2. Fail - See FT-IR method number guidelines and analysis test warnings.

a. Contaminated oil - Soot or water present.

b. Water exceeds guidelines - change oil and service or replace filter.

c. Fuel or coolant exceeds guidelines recommending corrective action. If fault is corrected, then

perform oil change and service or replace filter.

d. Additive depletion or lubricant degradation change oil and service or replace filter.

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