F. Location Zones
Zone Area
410 Subzone - Engine 1
420 Subzone - Engine 2
G. Prepare to remove the push-to-vent valve.
SUBTASK 24-11-00-010-002
(1) Do this task: Open the Fan Cowl Panels, TASK 71-11-02-010-801-F00.
H. Procedure
SUBTASK 24-11-00-780-001
WARNING
MAKE SURE YOU PUSH THE PUSH-TO-VENT VALVE. FAILURE TO DO THIS
COULD CAUSE HOT OIL TO SPRAY OUT AND CAN CAUSE INJURY TO
PERSONS.
(1) Release the IDG case pressure as follows:
(a) Push the push-to- vent valve [21] on the IDG for a minimum of 15 seconds to relieve
internal IDG pressure.
(b) If you cannot push the push-to-vent valve [21] to release the pressure, do these steps:
1) Remove the pressure fill cover from the pressure fill fitting on the IDG.
2) Put the container below the pressure fill hose.
3) Connect the pressure fill hose from the engine oil servicing cart, COM-1537 to the
pressure fill fitting on the IDG.
SUBTASK 24-11-00-020-001
(2) Remove the IDG push-to-vent valve [21] as follows:
(a) Remove the lockwire from the push-to-vent valve [21].
(b) Put an approved container under the vent valve port to catch the oil that drains.
WARNING
DO NOT OPEN THE IDG OIL SYSTEM UNTIL THE PRESSURE GOES TO
ZERO. A PRESSURIZED OIL SYSTEM CAN CAUSE INJURY TO
PERSONS.
(c) Remove the push-to-vent valve [21].
(d) Remove and discard the 0-ring [22].
SUBTASK 24-11-00-420-001
(3) Install the IDG push-to-vent valve [21] as follows:
(a) Lubricate a new o-ring [22] with oil, D00068 or oil, D00071.
(b) Put the o-ring [22] in correct position on the push-to-vent valve [21].
(c) Install the vent valve [21] on the IDG and torque to 110-150 pound-inches (12.4-16.9
Newton-meters).
(d) Safety the push-to-vent valve with MS20995C32 lockwire, G01048.
SUBTASK 24-11-00-610-001
(4) Do this task: IDG Servicing (Oil Fill), TASK 12-13-21-600-801.
SUBTASK 24-11-00-790-001
(5) Do this task: Dry Motor the Engine, TASK 71-00-00-700-821-F00.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-00
Page 209
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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