TM 55-4920-328-13
Table 3-2. Water Brake Pressure, Temperature, and Vibration Limits.
WATER PRESSURE
(PSIG MAX)
WATER TEMPERATURE
(DEG F MAX)
MAX VIBRATION
MILS)
BEARING TEMP
(DEG F MAX)
ENGINE
IN
OUT
IN
OUT
(PEAK TO PEAK)
FRONT
INTER
REAR
T53
110
110
100
205
2 (2)
200
200
TURBOSHAFT
T53
110
110
100
205
5(2)
120
120
TURBOPROP
T55
110
110
100
205 (1)
2 (3)
200
230
230
T63
110
110
100
205
3.5 (4)
120
120
T73
110
110
100
205 (1)
2 (5)
200
230
T74
110
110
100
205
5 (4)
200
200
T700
100 (8)
110
110
205
2
(7)
(7)
(7)
(1)
Refer to water temperature graph figure 3-1.
(2)
No vibration pickup installed.
(3)
200 Hz filter.
(4)
No filter.
(5)
110 Hz filter.
(6)
Spline end.
(7)
AL Not applicable. Bearing temperature is not monitored directly, but inferred by outlet water temperature.
(8)
Water pressure must be 60 psig min to water brake bearing.
Change 2
3-13
