TM 55-1520-240-23-6
7-50
TEST ACCUMULATOR (2770529/AD-A620-1D340 OR 60910) (AVIM)
(Continued)
7-50
FLUID LEAKAGE TEST
11.
Open valve (9). Apply 2 psi pressure to port (5).
Adjust valve (11) for 2 psi on gage (13). Maintain
pressure for 3 minutes.
12.
Check for leakage at port (14). Leakage at port
(14) shall be insufficient to form a drop.
13.
Release pressure to 0 psi on gage (13). Close
valve (11). Open valve (10).
14.
Close valves (9 and 10).
15.
Apply 3000 psi pressure to port (5). Adjust
valve (11) for 3000 psi on gage (12). Maintain
pressure for 30 minutes.
16.
Check for leaks at port (14). Leakage at port (14)
shall be insufficient to form a drop.
17.
Release pressure to 0 psi on gage (12). Close
valve (11). Open valve (10).
18.
Disconnect test setup (6) from port (5).
GAS LEAKAGE TEST
19.
Insert wood dowel (4) through port (14) to
contact piston of accumulator (1). Push dowel
until piston bottoms. Remove dowel.
20.
Connect reservoir (15) to port (5).
21.
Fill reservoir (15) with hydraulic fluid (E199) until
tube (16) is covered.
22.
Bleed air from block (2). Open valve (7). Wear
gloves (E184.1). Use cloths (E120) for spilled
fluid.
23.
Close valve (7).
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