(c) Place an oil resistant container (5 gal)(19 Liter), STD-1055, below the IDG [10] to catch
the oil.
(d) Remove the drain plug [17].
(e) Remove and discard the O-ring [22] from the drain plug [17].
(f) Let the IDG oil drain into the container.
(g) Apply oil, D00071, or oil, D00068 to new O-ring [22].
(h) Install new O-ring [22] onto IDG case drain plug [17].
(i) Install IDG case drain plug [17] on the IDG [10].
(j) Tighten the case drain plug [17] to 65 ±10 in-lb (7 ±1 N·m) and secure case drain
plug [17] with the MS20995C32 lockwire, G01048.
SUBTASK 24-11-11-020-001
(2) Disconnect the electrical connector [4], DP1205, and the electrical connector [13], DP1206,
from the IDG receptacles:
NOTE: For the specific steps to disconnect and give protection to these electrical connectors,
refer to General Precautions during the Removal and Installation of Engine
Components, TASK 70-10-02-910-801-F00.
SUBTASK 24-11-11-020-008
(3) Disconnect the IDG lanyards per the steps that follow:
ILF 301, 304, 308, 310, 314, 315, 317-319, 323, 401, 402, 405, 406, 409, 410, 412, 416, 424, 425,
427-429, 451, 452, 501-504, 507-510, 512-516, 518-520, 523-528, 530-533, 536, 541, 542, 552, 571,
572, 703, 707, 708; AIRPLANES WITH ONE LANDYARD ON EACH SIDE OF THE BRACKET
(a) Remove the nut [19], washer [21], bolt [23] and washer [24], that hold the two lanyards to
the bracket on the IDG [10].
ILF 101, 151, 156-199, 331-399, 491-500, 535, 537, 553-557, 559-564, 567-569, 573-577, 581, 583, 585,
588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 686, 691-699, 709, 710,
803-813, 821, 822, 831-838, 841, 842, 851, 852, 854-858, 861-863, 871-874, 947, 948, 968-973,
980-999; AIRPLANES WITH THE TWO LANYARDS TO THE SAME SIDE OF THE BRACKET
(b) Remove the nut [19], washer [21], bolt [20], washer [25] and washer [26], that hold the
two lanyards to the bracket on the IDG [10].
ILF ALL
(c) Remove the nut [19] and bolt [18] that hold the lanyard to the bracket on the gearbox.
(d) Move the lanyards so they are not between the IDG and the adapter assembly.
SUBTASK 24-11-11-020-002
CAUTION
USE TWO WRENCHES TO LOOSEN THE TUBE COUPLING NUTS. USE ONE
TO HOLD THE UNION, AND THE OTHER TO LOOSEN THE COUPLING NUT.
IF YOU DO NOT USE TWO WRENCHES, DAMAGE TO THE TUBE AND
UNIONS CAN OCCUR.
(4) Disconnect the oil-in line [14] and the oil-out line [1] from the IDG [10] as follows:
(a) Disconnect the oil-in line [14] and the oil-out line [1] from the oil-in union and the oil-out
union on the IDG [10].
NOTE: Let the oil drain from the lines into a oil resistant container (5 gal)(19 Liter),
STD-1055.
SUBTASK 24-11-11-020-003
(5) Remove the four power feeder leads [5] from the IDG [10] as follows:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-11
Page 403
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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