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747-400 MAINTENANCE MANUAL
S 216-041
(3) Do this task to examine the pressure oiler (service fitting):
CAUTION: DO NOT USE A BLUNT TOOL TO PUSH ON THE PRESSURE OILER
_______ SPRING POPPET. VENT THE IDG OIL SYSTEM WITH AN OIL FILLING ADAPTER. THE BLUNT TOOL CAN CAUSE DAMAGE TO THE PRESSURE OILER AND IDG OIL LEAKAGE CAN OCCUR.
(a)
Make sure the pressure oiler (service fitting) does not have any nicks, sctatches or gouges in the O-ring grove or on the sides of the oiler.
(b)
Make sure oil does not leak from the pressure oiler.
1) If oil is not leaking from the pressure oiler, clean the oil from the pressure oiler with Isporopyl alcohol. Dry the oiler with dry compressed air or nitrogen.
NOTE: Do not use chlorinated solvents to clean the
____ pressure oiler. Chlorinated solvents can cause damage to the IDG and the IDG oil system.
(c) If oil is leaking from the pressure oiler poppet, do the following: 1) If the IDG has a Push-To-Vent button, push the button. 2) Put a container below the IDG to catch the oil which will
flow from the IDG. 3) Put the end of the overflow drain hose into the container.
WARNING: BE CAREFUL WHEN YOU CONNECT THE OVERFLOW DRAIN HOSE.
_______ THE PRESSURE IN THE IDG CAN CAUSE HOT OIL TO COME OUT OF THE OVERFLOW DRAIN COUPLING. HOT OIL CAN CAUSE INJURY TO PERSONS.
CAUTION: USE THE CORRECT ADAPTER TO RELEASE THE PRESSURE FROM
_______ THE IDG. AN INCORRECT ADAPTER WILL NOT RELEASE THE PRESSURE IN THE IDG. THIS CAN CAUSE AN INCORRECT OIL LEVEL IN THE IDG AND THE SUBSEQUENT FAILURE OF THE IDG.
4) Connect the overflow drain hose to the pressure oiler on the IDG.
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747-400
MAINTENANCE MANUAL
5) After the pressure in the IDG is vented, remove the overflow drain coupling.
6) Remove the IDG end of the oil line to the pressure oiler. Place the oil line into a container.
7) Connect the hose on the oil service equipment to the pressure oiler.
CAUTION: WHEN THE PRESSURE OILER IS FLUSHED, DO NOT MIX TYPES
_______ OF OIL. IF THE OIL TYPES ARE MIXED DAMAGE TO THE IDG CAN OCCUR.
8) Flush the pressure oiler with 1/2 quart of oil.
9) Remove the oil service equipment to the pressure oiler.
10) Connect the oil service equipment to the hose end of the pressure oiler.
11) Clean the oil from the pressure oiler with Isporopyl alcohol. Dry the oiler with dry compressed air or nitrogen.
NOTE: Do not use chlorinated solvents to clean the
____ pressure oiler. Chlorinated solvents can cause damage to the IDG and the IDG oil system.
12) Apply pressure for a minimum of 20 seconds to the adapter fitting with the oil servicing tool and check the pressure oiler for leaks.
NOTE: Apply between 50 and 500 psig to the pressure oiler.
____ Do not apply more than 500 psig to the pressure oiler.
13) If the pressure oiler leaks, flush the pressure oiler with oil and do the pressure test.
14) If the pressure oiler leaks after the (20) twenty second pressure test, replace the pressure oiler.
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747-400 MAINTENANCE MANUAL
(d) Clean the oil from the pressure oiler with Isporopyl alcohol. Dry the oiler with dry compressed air or nitrogen.
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