2) For small adjustments, turn the adjustment sleeve [10] within the arm assembly [3].
NOTE: For fine adjustments of the arm assembly, remove the adjustment sleeve
from the arm and turn the sleeve in the same direction that the arm must be
moved. Each notch moves the wiper end about 0.034 inches (0.86
millimeters).
(b) Apply 3.5 lb (1.6 kg) to 4.5 lb (2.0 kg) downward force at the blade attach point.
1) Make sure the wiper blade [9] stays on the glass.
SUBTASK 30-42-31-420-003
(7) Install the bolt [5].
SUBTASK 30-42-31-420-004
(8) Install washer [8] and bolt [7] on the end of the shaft.
SUBTASK 30-42-31-820-001
(9) Do a check of the wiper arm assembly [3] down force. To do the check, do this task:
Windshield Wiper Arm Force Check/Adjustment, TASK 30-42-31-820-801.
SUBTASK 30-42-31-820-002
(10) Do a check of the wiper arm assembly [3] position. To do the check, do this task: Windshield
Wiper Arm Position Check/Adjustment, TASK 30-42-31-820-802.
SUBTASK 30-42-31-420-005
(11) Secure bolt [5] by applying 20 in-lb (2.3 N·m) – 25 in-lb (2.8 N·m) of torque. Secure bolt [7] by
applying 35 in-lb (4.0 N·m) – 40 in-lb (4.5 N·m) of torque. Secure bolts with lockwire [6].
E. Put the Airplane Back to Its Usual Condition
SUBTASK 30-42-31-860-006
(1) Remove the safety tags and close these circuit breakers:
CAPT Electrical System Panel, P18-3
Row Col Number Name
B 1 C00055 ANTI-ICE & RAIN WSHLD WIPER RIGHT
B 3 C00054 ANTI-ICE & RAIN WSHLD WIPER LEFT
C 1 C00523 HEATERS CAPT PITOT
D 1 C00226 WINDOW HEAT CONTROL RIGHT FRONT AC
D 2 C00225 WINDOW HEAT CONTROL LEFT SIDE AC
D 5 C00525 HEATERS F/O PITOT
D 6 C00524 HEATERS AUX PITOT
E 1 C00224 WINDOW HEAT CONTROL LEFT FRONT AC
E 2 C00227 WINDOW HEAT CONTROL RIGHT SIDE AC
F/O Electrical System Panel, P6-11
Row Col Number Name
ILF 568, 583, 588, 592-596, 671, 672, 832, 836, 837, 841, 842, 968-970, 972, 973, 980-999
B 7 C01650 WINDOW HEAT POWER L3
ILF 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 401, 424, 425, 427-429, 507, 533, 535, 537,
556, 557
B 7 C00229 WINDOW HEAT POWER L3, L4 & L5
ILF 502, 503, 514, 524, 707-710; ILF 101, 156-199, 409, 410, 412, 416, 451, 501, 504, 508, 513, 515,
516, 518, 531, 532, 536, 541, 542, 552, 571, 572, 574, 576, 803-813, 821, 822, 831, 854-856, 861-863,
871-873 PRE SB 737-56-1017
B 7 C00229 WINDOW HEAT POWER L4 & L5
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-42-31
Page 210
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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