TM 5-4310-343-35
(2) Test the Relief Valve as follows:
WARNING: HIGH PRESSURE AIR (3000 PSI). EXERCISE EXTREME CARE WHEN
WORKING WITH PNEUMATIC EQUIPMENT, TO PREVENT INJURY TO PERSONNEL
AND DAMAGE TO EQUIPMENT. PERFORM ALL TESTING IN AN ASSIGNED AREA,
CLEARED
OF
ALL
UNAUTHORIZED
PERSONNEL.
ENSURE
THAT
ALL
EQUIPMENT IS PROPERLY CLEARED AND SECURED. CLAMP ALL PNEUMATIC
EQUIPMENT BEING TESTED FIRMLY IN A VISE OR OTHER SUITABLE TESTING
FIXTURE.
USE A HEAVY METAL SHIELD, EQUIPPED WITH SUITABLE GLASS
WINDOWS TO PROTECT PERSONNEL WHEN PROOF PRESSURE TESTING.
EXERCISE CAUTION WHEN REMOVING SPRING-LOADED RELIEF VALVE CAPS
OR RETAINERS TO PREVENT INJURY TO PERSONNEL.
DO NOT ATTEMPT
REMOVAL OR DISASSEMBLY OF ANY COMPONENT WHILE THE SYSTEM is
PRESSURIZED. DO NOT TAMPER WITH ANY RELIEF VALVES. DO NOT EXCEED
SPECIFIED OPERATING LIMITS.
(a) Assemble relief valve to test fixture 876701 or equivalent and connect to high pressure pneumatic
supply.
(b) Slowly increase air pressure to 550 psig. Valve should pop open.
(c) If valve fails to operate as specified, shut down test pressure supply, purge lines, and then adjust plug
and repeat testing procedure until specified setting is obtained.
(d) Reduce air pressure to 400 psig and check for leakage. Maximum permissible leakage is 15 cc per
minute.
(e) Insert new cotter pin after completion of test.
e. Oil Pump (1) Refer to figure 6-4 and reassemble oil pump as follows:
(a) Soak new oil seal (22), ring seal (11), and O-rings (13) in oil Specification MIL-L-60851 for one hour
prior to assembly.
5-32
