 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|
 NAVAIR 17-15-50.4
TM 38-301-4
T.O. 33-1-37-4
CGTO 33-1-37-4
COMPONENT:
Cummins NTC 290 (Engine)
LUBRICANT: MIL-L-2104
Fe
Ag
Al
Cr
Cu
Si
Sn
Ni
Pb
Mo
Mg
Normal Range
0-107
0-19
0-13
0-92
0-42
0-4
0-2
0-38
0-12
108-
93-
Marginal Range
20-24
14-16
43-51
5
3
39-47
13-14
130
114
131-
115-
High Range
25-30
17-19
52-64
6
4
48-58
15-18
164
142
Abnormal
165+
31+
20+
143+
65+
7+
5+
59+
19+
Abnormal Trend
(PPM Increase
11
2
2
6
4
2
2
3
2
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 silicone 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.
Piston rings and cylinder liners normally show the most significant
wear during operation.
The engine is liquid-cooled; therefore, ethylene glycol present in
the engine oil would indicate a leak in the coolant system.
Wear of end-thrust washers in turbocharger will permit rubbing of
the turbocharger hot wheel against the turbocharger housing. This
in turn will produce chromium, iron, nickel, and copper in the
engine oil.
Aluminum-Silicon
Piston wear or piston and cylinder wall wear. Crankshaft thrust
(Al-Si)
bearing.
Chromium
Oil control rings and first compression ring are chromium plated.
(Cr)
Chrominum-Iron
Ring and Cylinder liner wear.
(Cr-Fe)
Iron
Wear of cylinder walls. Wear of numerous other engine parts. Also
(Fe)
from machining chips left in engine.
APPLICABLE END ITEMS
F5070
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals