M1075 Transmission

NAVAIR 17-15-50.4

TM 38-301-4

T.O. 33-1-37-4

CGTO 33-1-37-4

M1075 Transmission

Normal

0-60

0-3

0-16

0-337

0-11

0-172

0-10

0-9

Marginal

61-85

4-5

17-20

338-415

12-13

173-212

11-18

10-15

High

85-100

6-7

21-25

416-519

14-16

213-265

19-26

16-20

Abnormal

101+

26+

520+

18+

266+

27+

21+

Trend

104

TECHNICAL INFORMATION

Notes

The prevalent metal/elemental components in these transmissions are comprised of Aluminum (Al), Iron (Fe), Copper (Cu),

Tin (Sn) and Lead (Pb). Typical contamination elements are Silicon (Si) from dirt and additive, and Sodium (Na)

representing salt from the dirt. MIL-PRF-2104 products are used in the transmissions.

The Titanium (Ti), Chromium (Cr), and Nickel (Ni), are not considered adequate for use as wear metals since there are no

components with those elements in any concentration that should be monitored. Therefore, it is recommended that these

elements should not be monitored under AOAP for the M1070, M1074, and M1075 transmissions.

Zinc (Zn), Molybdenum (Mo), Boron (B), and Magnesium (Mg) are typical additives found in products under MIL-PRF-

2104. Mg can also be found in some metallic alloys. However, when the Mg is an additive it can be found in concentrations

as high as 600 ppm. Therefore, Mg is not a good indicator of wear since there is no way to determine how much is from the

additives and how much is from wear. Unlike Zn, not all lubricant products contain B, Mg, or Mo. B and Mo, like Mg, are

not recommended for use as elements to be used for condition since they are not wear elements nor a typical value can be

determined for oil condition. The element Zn is an exclusive result of additives. The range of values for Zn in oil is 1000-

1300 ppm. This range is a normal range for Zn. Values lower than 900 ppm should be considered suspicious since it would

be a result of a non-MIL-PRF-2104 product.

B-123