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Page Title:
General Electric HMPT-500 (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:
General Electric HMPT-500 (Transmission)
LUBRICANT: MIL-L-2104
Fe
Ag
Al
Cr
Cu
Si
Sn
Ni
Pb
Mo
Mg
Normal Range
0-186
0-8
0-45
0-5
0-276
0-124
0-52
187-
277-
125-
Marginal Range
9-10
46-55
6
53-64
229
339
153
340-
154-
230-
65-80
11-12
56-69
7
High Range
424
191
286
Abnormal
287+
13+
70+
8+
425+
192+
81+
Abnormal Trend
(PPM Increase
20
2
3
2
28
13
4
in 10 hrs)
TECHNICAL INFORMATION
This is 500-hp hydromechanical power transmission (HMPT) with
fully automatic shifting, three forward and one reverse speed
ranges.
It is liquid-cooled, but the transmission pressure is normally higher
than the liquid-coolant pressure, therefore transmission oil would
normally contaminate the coolant in the event of a common leak
between the two.
Transmission has a tow pump to provide push- or pull-start
capability for the vehicle engine.
Power take-off (PTO) could present wear and oil contamination
problems.
APPLICABLE END ITEMS
M2, M3, M993
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