NOTE: No corrective action is necessary if the following maintenance messages display: AUX
BAT CHGR INOP or BAT CHGR INOP. These maintenance messages are nuisance
faults that will display when only battery power is supplied to the airplane.
SUBTASK 24-11-11-840-001
(2) Do these steps to prepare the IDG [10] for the installation:
(a) If necessary, inspect the accessory gearbox magnetic/sealol seal for leaks, do this task:
TASK 72-60-00-200-802-F00.
(b) If it is installed, remove the protective cover from the gearbox mount pad on the
accessory gearbox.
(c) Examine the IDG [10], the QAD ring and the input seal for signs of damage or unwanted
material.
(d) Clean all grease from the IDG input shaft with solvent, B00074.
(e) Apply a thin layer of oil, D00068, or oil, D00071, to the lugs of the QAD ring and to the
threads of the QAD tension bolt.
CAUTION
USE ONLY M83485 O-RING WHEN USING HIGH THERMAL STABILITY
(HTS) OIL CONFORMING TO MILSPEC-23699 IN THE ENGINE
(EXAMPLE: BP/EASTMAN TURBO OIL 2197, AEROSHELL TURBINE OIL
560, MOBIL JET OIL 254). USE OF OTHER O-RING STANDARDS
(EXAMPLE: M83248 OR AS3209) WITH HTS OIL WILL RESULT IN
REDUCED O-RING LIFE, ENGINE OIL LEAKAGE, AND POTENTIAL
ENGINE SHUTDOWN.
(f) Lubricate a new O-ring [16] with oil, D00068, or oil, D00071.
(g) Install the new O-ring [16] on the input shaft of the IDG [10].
H. Integrated Drive Generator (IDG) Installation
SUBTASK 24-11-11-420-001
(1) Do these steps to install the IDG [10]:
(a) Make sure that the VSCF and IDG jack adapter, SPL-1634, is installed on the low profile
hydraulic jack, COM-1443.
(b) Put the IDG [10] on the jack.
(c) If the generator lifting eye, SPL-1626, is installed on the IDG [10], remove the eyebolt and
install a bolt on the IDG [10].
(d) If not already done, turn the QAD tension bolt to put the QAD ring in the open position.
1) Make sure that you align the mark on the QAD ring with the mark on the QAD
engine adapter plate.
NOTE: The mark on the QAD ring is inside the gearbox pad and is found on the
adapter plate.
CAUTION
DO NOT LET THE IDG HANG ON THE INPUT SHAFT DURING THE
INSTALLATION. FAILURE TO GIVE SUFFICIENT SUPPORT TO THE IDG
CAN CAUSE DAMAGE TO THE INPUT SHAFT AND CARBON SEALS.
(e) Align the IDG [10] with the gearbox mount pad.
(f) Adjust the IDG [10] until the lugs on the IDG input flange engage with the QAD ring
openings.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-11
Page 413
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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