Removal Of Wiper Mechanism; Installation Of Wipe Mechanism - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
4-51. WINDSHIELD WIPER MECHANISM.
4-52. REMOVAL OF WIPER MECHANISM. (Refer to Figure 4-9.)
a. Remove the access panel on the left side of the nose section.
b.
Cut the lockwire (5) at the bolt which secures the arm (3) to the serrated converter shaft and
remove the bolt.
c. Loosen the adjustment nut (4) and lift the wiper arm (3) off the converter shaft. Refer to Paragraphs
4-55 and 4-56 for wiper blade replacement and adjustment.
d. Remove two screws from seal cover around converter shaft and remove cover and old sealant
from shaft.
e. Disconnect the electrical connection to the wiper motor (8).
f. Remove the remaining screws holding the motor and converter to the airplane, and remove the
complete assembly.
g.
If necessary, the converter (7) and motor (8) can be separated by unscrewing the motor from the
converter.
CAUTION
When separating the motor from the converter, do not lose the
coupling (11) between the motor shaft (9) and converter drive
shaft (12).
4-53. INSTALLATION OF WIPER MECHANISM. Refer to Figure 4-9.
a. The wiper motor and the converter must be timed before connecting the two units together and
installing them in the airplane. The timing can be accomplished as follows:
1. Rotate the drive shaft (12) in the converter (7) until the end of travel, corresponding to the
park position. is obtained at the serrated converter shaft.
2. Temporarily connect the electrical connector to the wiper motor (8) and operate the motor,
ending with the switch in the PARK position. Disconnect the electrical connector.
b. Assemble the wiper motor and converter by screwing the two units together.
NOTE
Ascertain that the coupling (11) is installed when connecting the
motor and converter.
c. Assemble the units slowly until the coupler engages the converter drive shaft (12). The alignment
should be automatic, but if severe binding occurs, back off and reassemble.
d.
Screw units together until the nipple (10) bottoms in the converter and then back off for
alignment of mounting brackets (13) and (14).
e.
Install the assembled units into the airplane and secure with four screws. Do not install the seal
cover at this time.
f. Apply a bead of sealer around the converter shaft where it extends through the fuselage and
position and secure the seal cover in place with two remaining screws.
g. Connect the electrical connector to the wiper motor and replace the access panels removed.
h. Refer to Paragraphs 4-55 and 4-56 for wiper blade and arm installation and adjustment.
Reissued: 9/23/80 STRUCTURES
1F20