| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-242-14
0022 00
ACCUMULATORS (continued)
3.
OPEN the hand charge pump valve (4) and the isolation valve (5) at the hand charge pump (6).
5
4
6
4.
OPEN the accumulator shutoff valve (1) for one accumulator and observe the accumulator's gauge (7) reading. The
gauge reading should fall to zero.
5.
CLOSE the accumulator blowdown valve (3) and leave all of the other valves as found at the end of step 4.
6.
Pump several strokes on the hand charge pump (6) while observing the accumulator gauge (7). The pressure should rise
quickly, and then stabilize. Once stabilized, the pressure will rise only very slowly with additional pump strokes. This
stabilized pressure is the accumulator precharge pressure.
7.
Log the accumulator precharge pressure. 1250 lb/in (86.2 bar) is normal.
Pressurize Accumulators
NOTE
When the ambient temperature is above 40 F (4.4 C), an accumulator pressure of 1500
lb/in (103.4 bar) will provide adequate cranking to start the engine. Between 40 F (4.4
C) and 0 F (-17.8 C), 2500 lb/in (172.4 bar) should be sufficient. Below 0 F (-17.8 C),
the accumulators should be charged to 3250 lb/in (224.1 bar). For ambient temperatures
below 40 F (4.4 C), a starting aid should be used.
8.
Use the hand charge pump (6) to raise the accumulator to the appropriate starting pressure as determined by the ambient
temperature.
9.
Repeat steps 1-8 for each of the three remaining accumulators.
0022 00-2
|
||
|
||
