TM 55-2840-254-23
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1-87 CHECK FOR SEAL LEAKAGE (NO. 2 BEARING PACKAGE) (AVIM) (Continued)
a. Connect hose (7) of seal leakage tester (T44)
(6) to calibration block fitting (8).
b. Turn vacuum pump switch (9) to ON position
and run for one minute.
c. Record reading on vacuum gage (10).
d. Turn vacuum pump switch (9) to OFF posi-
tion. Wait one minute.
e. Turn vacuum pump switch (9) to ON position
and run for one minute.
f. Record readings on vacuum gage (10).
g. Turn vacuum pump switch (9) to OFF posi-
tion.
h. Compare readings recorded in steps c. and f.
If either reading-is below 7 inches Hg, replace
seal leakage tester (T44) (6).
i. Disconnect hose (7) from calibration block
fitting (8).
j. Connect hose (7) to calibration block fitting
(11).
k. Repeat steps b. thru g. Compare readings re-
corded in steps c. and f. If either reading is
below 11 inches Hg, replace seal leakage tester
(T44) (6).
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