Wiper Arm Installation
Figure 401 (Sheet 3)
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A
747-400 MAINTENANCE MANUAL
2) 180H12, WDO HEAT CONT 1R
F. Wiper Arm Removal Procedure
S 144-004
(1) Remove the sealant from the heads of all screws (7, 8, 11) on the hub with a cutting tool.
NOTE: It is not necessary to remove sealant from screws (8,11) if
____
only the wiper arm is removed.
S 954-005
(2) Put a cloth pad between the wiper arm (5) and the airplane structure (this will to prevent the arm from scratching the surfaces when the blade is removed).
NOTE: It is possible to remove the arm and the blade together.
____
S 034-006
(3) Remove the screw (2), the washer (3), the wiper blade (1), and the washer (3).
(a) Lower the wiper arm (5) onto the cloth pad.
S 024-007
(4) Remove the pressure plate screws (7) and remove the pressure plate (6) and the wiper arm (5).
NOTE: If hub is not damaged, wiper arm replacement can be
____ simplified if you do not remove the hub assembly. If this procedure is followed, omit the removal and installation of the hub assembly.
S 424-035
(5) Remove the wiper arm hub (10) if it is necessary:
(a)
Loosen the hub clamp screw (11).
(b)
Remove the hub holddown screw (8) and the washer (9).
(c)
Pull the windshield wiper hub (10) off the motor/converter shaft.
TASK 30-42-02-404-011
3. Windshield Wiper Arm Installation (Fig. 401).
_________________________________
A. Standard Tools and Equipment
(1)
Water spray - clean (to make the windshield wet during wiper operation)
(2)
Sealing gun - 6-inch length cartridge, Semco Research or equivalent
B. Consumable Materials
(1)
A00247, Sealant BMS 5-95, Class B
(2)
B00083, Cleaner - Aliphatic Naphtha, TT-N-95
(3)
D00013, Grease - MIL-G-23827
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747-400
MAINTENANCE MANUAL
(4) G00371, Brush - Soft Bristle
C. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Wiper Blade | 30-42-01 | 01 | 30 | | | 5 | Wiper Arm Assembly - left | | | 35 | | | 5 | Wiper Arm Assembly - right | | | 40 | 2......…........…...................................…...........….....…........1
D. References
(1)
AMM 24-22-00/201, Manual Control
(2)
SSM 30-42-01
(3)
WDM 30-42-11
E. Access
(1) Location Zone 221 Control Cabin, LH - Outside No. 1 Left Window 222 Control Cabin, RH - Outside No. 1 Right Window
F. Install Wiper Arm
S 864-036
(1)
Close 7E1, WSHLD WIPER L and 7E25, WSHLD WIPER R circuit breakers on the P7, Overhead Circuit Breaker Panel.
S 864-037
(2)
Set the applicable WIPER switch on the anti-ice/rain removal module to LO and then to OFF (so that the motor/converter shaft is in the park position).
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