Detroit Diesel Allison MT 654CR (Transmission)

NAVAIR 17-15-50.4

TM 38-301-4

T.O. 33-1-37-4

CGTO 33-1-37-4

COMPONENT:

Detroit Diesel Allison MT 654CR (Transmission)

LUBRICANT: MIL-L-2104

Normal Range

0-146

0-6

0-15

0-4

0-500

0-21

0-6

0-23

147-

501-

Marginal Range

16-19

22-26

7-8

24-28

180

625

626-

181-

27-33

9-10

29-35

8-9

20-23

6-7

High Range

780

225

Abnormal

226+

10+

24+

781+

34+

11+

36+

Abnormal Trend

(PPM Increase

160

in 10 hrs)

TECHNICAL INFORMATION

* The manufacturer states normal break-in is 5000mi/200hr/12mo,

whichever is longest. During this time, an increase in Cu alone is

not cause for concern. No action should be taken except to change

oil when Cu reached 900 PPM. If Cu and another wear-metal

element increase simultaneously, detrimental wear may be

occurring and routine evaluation techniques apply.

Silicon additives may be used as antifoaming agents in the

lubricating oil, thus new oil normally gives a reading of 3 to 7

PPM silicon.

Aluminum particles are commonly found in the transmission pan.

Aluminum and cast iron parts have significant amounts of silicon

in their composition.

Transmission is liquid-cooled; therefore, ethylene glycol may be

present in the oil. If significant amounts of ethylene glycol are

found, it is suggested that appropriate action be taken because the

clutches and seals may be affected accordingly.

APPLICABLE END ITEMS

M923, M924, M925, M927, M928, M929, M940, M941, M942, M943, M944, M945, M930, M931, M932, M934, M936

M939

B-95