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Page Title:
Caterpillar D7155 (Transmission) |
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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:
Caterpillar D7155 (Transmission)
LUBRICANT: MIL-L-2104
Fe
Ag
Al
Cr
Cu
Si
Sn
Ni
Pb
Mo
Mg
20-
Normal Range
5-15
0-2
0-3
5-15
100
101-
Marginal Range
16-30
3-6
4-7
16-30
200
201-
High Range
31-45
7-10
8-10
31-50
300
Abnormal
301+
46+
11+
11+
51+
Abnormal Trend
(PPM Increase
60
9
3
3
10
in 10 hrs)
TECHNICAL INFORMATION
Silicone additives may be used for antifoaming agents in the
lubricating oil, thus new oil normally gives a reading of 3 to 7
PPM silicon. Springs used in clutches for the transmission may
have silicone coatings. This will result in high silicon readings on
new or rebuilt equipment. Also, the transmission will normally
show high iron readings during the break-in period.
The transmission is air-cooled; therefore, there should be no
ethylene glycol contamination problems.
APPLICABLE END ITEMS
M915, M916, M917, M918, M919, M920
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