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Page Title:
Detroit Diesel Allison 8V92T (Engine) |
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 NAVAIR 17-15-50.4
TM 38-301-4
T.O. 33-1-37-4
CGTO 33-1-37-4
COMPONENT:
Detroit Diesel Allison 8V92T (Engine)
LUBRICANT: MIL-L-2104
Fe
Ag
Al
Cr
Cu
Si
Sn
Ni
Pb
Mo
Mg
Normal Range
0-201
0-16
0-25
0-70
0-67
0-54
0-6
0-53
0-13
202-
Marginal Range
17-19
26-31
71-86
68-83
55-66
7-8
54-65
14-17
247
248-
87-
84-
High Range
20-24
32-38
67-83
9-10
66-82
18-21
309
107
104
Abnormal
310+
25+
39+
108+
105+
84+
11+
83+
22+
Abnormal Trend
(PPM Increase
25
2
3
5
4
4
2
4
2
in 10 hrs)
TECHNICAL INFORMATION
A faulty air induction system is normally a significant 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 is
used in "Print-O-Seal" cylinder head gaskets and crankshaft seals
for this engine which will normally show 20 to 30 PPM silicon in
the oil. Aluminum and cast iron parts in the engine have significant
amounts of silicon in their composition.
Significant wear can be expected on the piston skirts and cylinder
liners for this engine.
The engine is liquid-cooled; therefore, ethylene glycol present in
the engine oil would indicate a leak in the coolant system.
APPLICABLE END ITEMS
M977, M978, M983, M984, M985
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