TM 55-1650-261-40
SECTION IV
FINAL TEST PROCEDURES
5606 or MIL-H-6083. Filter the hydraulic fluid of all
19. General Test Procedures
foreign matter over 10 microns in size. Conduct tests at
70
room temperature of to 90'F (21' to 32'C) and an oil
Bench-test the slide valve assembly, using hydraulic test
temperature of 70' to 109'F (21 to 43'C). Record the
stand, part No. HA5-1-2-3-5-6-7. The proof pressure test
actual oil temperature during tests.
must be performed first, but thereafter the sequence of
performance of the follow ing tests is immaterial.
20. Proof Pressure Test.
Hydraulic fluid used during tests must conform to Military
a. Deenergize solenoid assembly. (See figure 5.)
Specification MIL-H-
Figure 5. Slide Valve Assembly Schematic Diagram.
b. Plug return and cylinder ports.
c. Apply a hydraulic pressure of 4500 psig to
f. In each of the above tests, there must be no
pressure port and ;hold for 1 minute. There must be no
evidence of lag or hesitation during actuation.
evidence of external leakage, failure, or permanent set.
d. Remove plug from return port and plug pressure
22. Leakage Test
port.
e. Apply a hydraulic pressure of 4500 psig to return
a. Plug cylinder port 2. With solenoid assembly
port and hold for 1 minute. There must be no evidence of
deenergized, apply a hydraulic pressure to pressure port.
external leakage, failure, or permanent set.
b. Remove plug from cylinder port 2 and plug
cylinder port 1. With solenoid assembly energized, apply
21. Actuation Test
a hydraulic pressure of 3000 psig to pressure port.
c. Remove plug from cylinder port 1 and plug
a. Cap cylinder ports with gages and open return port
cylinder port 2. With solenoid assembly deenergized,
to drain.
apply a hydraulic pressure of 5 psig to pressure port.
b. With solenoid assembly deenergized, apply a
d. Remove plug from cylinder port 2 and plug
hydraulic pressure of 3000 psig to pressure port. Gage at
cylinder port 1 and increase pressure at pressure port to
cylinder port 2 must read 3000 psig.
100 psig. With solenoid assembly energized, apply a
c. Energize solenoid assembly. Gage at cylinder port
hydraulic pressure of 5 psig to pressure port.
I must read 3000 psig, and gage at cylinder port 2 must
e. 'In each of the above tests, combined leakage
read 0 psig.
from open ports must not exceed 20 cc a minute,
d. Deenergize solenoid assembly. Gage at cylinder
measured immediately after selection.
port 2 must read 3000 psig, and gage at cylinder port 1
f. Lockwire screws (2, figure 3) and screws (22) upon
must read 0 psig.
completion of tests.
e. Perform steps c and d above 13 times, applying a
hydraulic pressure of 100 psig instead of 3000 psig.
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