Caterpillar 3208 (Engine)

NAVAIR 17-15-50.4

TM 38-301-4

T.O. 33-1-37-4

CGTO 33-1-37-4

COMPONENT:

Caterpillar 3208 (Engine)

LUBRICANT: MIL-L-2104

30-

0-10

0-3

0-20

0-25

0-20

Normal Range

150

151-

Marginal Range

11-15

4-12

21-27

21-35

26-40

21-27

230

231-

16-45

13-20

28-35

36-50

41-75

28-35

High Range

300

Abnormal

301

46+

21+

36+

51+

76+

36+

Abnormal Trend

(PPM Increase

in 10 hrs)

TECHNICAL INFORMATION

A faulty air induction system is normally the major source of

silicon in engine oil. Antifoaming agents in engine oil

normally contain silicon which will give 3 to 7 PPM in new

oil. Silicone coatings may also be used in oil-wetted engine

parts. Aluminum and cast iron parts in the engine can have

significant amounts of silicon in their composition.

Molybdenum (Mo) levels can be employed to determine the

condition of the top (fire) ring. Molybdenum may be present

as a dry lubricant or as an additive in some greases, requiring

evaluator interpretation.

The engine is liquid-cooled; therefore, ethylene glycol may be

present in the engine oil, indicating coolant contamination.

Lead (Pb) is normally generated at relatively high levels

during the break-in period of the engine, and then remains

fairly constant except for heavy loading, marginal lubrication,

or excessive dirt. Increased lead can be the first symptom of

bearing distress.

APPLICABLE END ITEMS

613WDNS, 613WDS, 613SNS, 613SS, K300

B-9