Windshield Wiper Assembly Installation 500
30-42-11 Figure 401 Feb 20/86
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(1)
Mark relative position of converter shaft and arm before removing sleeve.
NOTE: Slot in serrated sleeve must align within 30 degrees of slot in wiper arm hub.
(2)
Remove wiper arm from converter shaft.
(3)
Rotate arm in direction of required adjustment. A rotation of one serration is equivalent to 0.034-inch movement of end of wiper arm. Install arm on converter shaft. Lockwire clamp-up bolt.
F. Secure wiper arm to converter shaft with attaching bolt and lockwire.
G. Tighten pinch screw and lockwire.
H. Spray water on windshield and drive wiper blade to check that blade does not contact metal structure. If blade contacts structure, adjust wiper arm until blade is clear of structure.
CAUTION: DO NOT OPERATE WINDSHIELD WIPERS ON DRY WINDSHIELDS.
I. Adjust and test per Windshield Wiper Assembly - A/T.
4. Remove Windshield Wiper Blade
A. Loosen adjusting nut on wiper arm (Fig. 401).
CAUTION: DO NOT PULL WIPER ARM AWAY FROM WINDSHIELD WITHOUT RELEASING ARM TENSION.
B. Remove nut securing wiper blade and remove blade.
5. Install Windshield Wiper Blade
A. Attach wiper blade to wiper arm and secure blade with nut so that blade is at proper angle with arm.
B. Tighten adjusting nut.
C. Adjust and test per Windshield Wiper Assembly - A/T.
500
Feb 20/87 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 30-42-11 Page 403
WINDSHIELD WIPER ASSEMBLY - ADJUSTMENT/TEST
1. Equipment and Materials
A. Tension spring scale - 0- to 20-pound capacity
2. Windshield Wiper Assembly Adjustment
A. Spray water on windshield and adjust wiper arm approximately in center of stroke if system can be operated; otherwise in park position.
CAUTION: DO NOT OPERATE WINDSHIELD WIPERS ON DRY WINDSHIELDS.
B. Adjust pressure with adjusting nut. Blade pressure adjustment is made at hub of arm. Then turn it backward slightly to make sure head of tee bolt is seated parallel to groove.
CAUTION: DISCARD THE ADJUSTING NUT AND TEE BOLT IF THEY ARE LOOSE. THE WIPER BLADE MAY BECOME LOOSE IF THE ADJUSTING NUT AND TEE BOLT ARE USED AGAIN.
C. Hook a spring scale under arm where blade and arm connect and check that scale reads 5.5 to
6.5 pounds perpendicular to windshield just as any part of wiper blade starts to lift from glass. If required tension cannot be obtained, replace wiper arm.
D. Turn wipers on HIGH and allow to operate for several seconds. Stop wipers in mid-travel position and recheck tension per step C. If tension has changed repeat steps B, C, and D until tension has stabilized.
3. Windshield Wiper Assembly Test
A. Refer to Windshield Wiper System - A/T.
500
Oct 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 30-42-11 Page 501
WINDSHIELD WIPER DRIVE ASSEMBLY - REMOVAL/INSTALLATION
1. Remove Windshield Wiper Drive Assembly (See figure 401.)
A. Open WIPER L or WIPER R circuit breakers on P18 load control center.
B. Open pilot's (or copilot's) instrument panel.
C. Disconnect connector plug from motor.
500 Windshield Wiper Drive Assembly Installation
Nov 15/67 Figure 401 30-42-21
Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
D. Remove wiper assembly. See 30-42-11, Windshield Wiper Assembly - R/I.
E. Remove bolts attaching drive assembly support fitting to structure and remove drive assembly.
F. Remove ground lead from drive motor.
2. Install Windshield Wiper Drive Assembly
A. Check that converter worm gear end cap is safety wired. If not, instal1 safety wire.
B. Connect ground lead to drive motor mounting bracket.
C. Place drive assembly in position and install bolts attaching drive assembly support fitting and ground lead to structure.
D. Turn the rain repellent solenoid toward the center of the airplane if it will touch the wiper motor.
NOTE: The rain repellent solenoid must not touch the wiper motor.
E. Connect plug to motor.
F. Close pilot's (or copilot's) instrument panel.
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