Table 6-3. Wiper Assembly Troubleshooting - Continued
Lowest
Malfunction
Probable cause
Corrective action
maintenance
category
DS
2. Wiper motion rough or
a. Defective ball bearing in erratic gear
a. Inspect ball bearing and make
train.
necessary replacement (para 6-
Depot
b. Defective gear in gear train.
b. Inspect components of the gear
train and make any needed
replacement.
c. Clutch assembly 10516819(7, fig. 6-
c. Tighten screw (1, fig. 6-13) to
DS
tighten clutch assembly on shaft.
3. Wiper blade fails to zero
a. Faulty actuator 6650-904-5877 (4,
a. Replace actuator (para 6-15).
DS
b. Faulty sensitive switch5930-583-
b. Replace sensitive switch(para 6-
DS
6582, (5, fig..6-12).
4. Wiper motors
does
not
a. Faulty semiconductor de- vice 5960-
a. Replace semiconductor device
DS
operate
883-4798 (6, fig. 6-12).
b. Faulty gear case motor3010-906-
b. Replace gear case motor(para
DS
6317 (15, fig. 6-12).
DS
c. Check connections to connector
c Faulty connection or pin on electrical
and pins for damage. Replace
receptacle connector 5935-881-
connector(para 6-18).
7775.
teeth, excessive wear, or burrs. Check the fit of the
6-13. Replacement of Wiper Blade Assembly 6650-
bearing and gears on the shaft for excessive side play.
924-5875
c. Installation.
(1) Assemble in sequence items 14 through 1
a. Removal. Disassemble items 1 and 2 (fig. 6-7).
b. Inspection.
Inspect the wiper blade for
(2) Apply a light coating of aircraft and
deteriorated rubber, cuts, or gouges. Check to ensure
instrument grease. MIL-G-23827 9150-261-8298, to the
that the spring of the arm assembly is operable and that
teeth of each of the gears.
it exerts force against the wiper blade.
(3) Apply a small amount of instrument
c. Installation. Assemble in sequence items 2 and
lubricating oil, MIL-L-6085 9150-223-4129, to each of the
ball bearings.
(4) Assemble in sequence items 6 through 1
6-14. Replacement of Ball Bearings 8589768
a. Disassembly.
6-15. Replacement of Actuator 6650-924-5877
(1) Disassemble items 1 through 6 (fig. 6-7).
(2) Disassemble items 1 through 14 (fig. 6-
a. Removal.
(1) Disassemble items 7 through 10 (fig.6-7).
b. Inspection. Inspect the condition of each of the
ball bearings for wear, damage, or other signs of
unserviceability. Check each of the gears for missing
6-11
