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Page Title:
Continental AVDS 1790-2DR (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:
Continental AVDS 1790-2DR (Engine)
LUBRICANT: MIL-L-2104
Fe
Ag
Al
Cr
Cu
Si
Sn
Ni
Pb
Mo
Mg
Normal Range
0-103
0-7
0-20
0-10
0-28
0-41
0-6
0-3
0-22
0-3
104-
Marginal Range
8-9
21-24
11-12
29-34
42-51
7-8
4
23-28
4
127
128-
10-12
25-40
13-15
35-66
52-90
9-11
5-6
29-40
5
High Range
158
Abnormal
159+
13+
41+
16+
67+
91+
12+
7+
41+
6+
Abnormal Trend
(PPM Increase
14
2
3
2
4
10
2
2
4
2
in 10 hrs)
TECHNICAL INFORMATION
The AVDS 1790-2DR is equipped with a power take-off unit
employed in hoisting and towing various vehicles of equipment.
A faulty air induction system is the major source of silicon in
engine oil. Aluminum and cast iron parts in the engine can have
significant amounts (up to 13.5%) of silicon in their composition.
When the rear main seal in an AVDS 1790 engine attached to a XT
1410-2A transmission wears excessively or ceases to function
properly, there will be cross-contamination of the engine and
transmission lubricants. This, in general will be indicated by
increasing or high copper (Cu) and lead (Pb) in the engine oil
samples and, simultaneously, increasing or high molybdenum
(Mo) in the transmission oil samples.
The engine is air-cooled; therefore, no
liquid
coolant
contamination problems should be experienced.
Aluminum and iron particles from both wear and machining are
commonly found in the oil pan.
APPLICABLE END ITEMS
M88A1
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