Piper Navajo PA-31 Service Manual page 246

PIPER NAVAJO SERVICE MANUAL
5-74 ASSEMBLY OF FLAP ACTUATOR MOTOR. (Refer to Figure 5-19.)
a. Assemble shoulder washers ( 13). contact studs (10), lockwashers( 12) and nuts(11) to front and bell.
Position flat on contact studs parallel to the side of the brush holder. On early models. apply Loctite 75
adhesive to inner nut (11). (See Sketch A of Figure 5-19.) Torque outer nut (11) to 30-35 inch pounds.
b.
Install insulator assembly (8) on front end bell and secure with 4 screws (9).
c.
Install brush springs (7) and brushes (6) into brush holders. Position brush leads through slot
towards center of end bell and connect to contact studs.
d. Attach ball bearings (15) to each end of the armature shaft.
NOTE
A light press fit on the bearings may be required on the shaft.
e. Install front end bell assembly onto commutator end of armature.
f.
Insert armature assembly into sleeve and magneto assembly ( 18) with commutator end of armature
towards larger recess in motor sleeve.
CAUTION
A strong magnet pull will be encountered when inserting armature
assembly into sleeve and magnet assembly
g.
Position front end bell on sleeve so that mounting holes are in line with pin in sleeve and lockwire
hole is to the right of the pin.
h. Insert spring washer (16) into bearing bore of rear end bell (1) with tangs on washer pointer up
i. Install rear end bell on sleeve with mounting holes lined up with pin in sleeve and lockwire hole to
the left of the pin.
J. Insert screws (4) through frontend bell(5)and rearend bell( ). Secure ith lockwashers (3) and hex
nuts (2). Torque nuts (2) 30-40 inch pounds.
5-75. INSTALLATION OF FLAP ACTUATOR MOTOR. (Refer to Figure 5-20.)
a. Install the shock grommets in the bulkhead at station 174.
b.
Install the flap actuator motor (5) and bracket (13) on the forward side of the bulkhead. Ascerta an
that the anti-rotation pin on the motor fits in the pinhole in the mounting bracket. Secure the holding clamp
(9).
c.
Connect the flexible drive shaft ends (4 and 6) to the motor and attach nut (10) fingertight and
secure with MS20995-C41 safety wire (12).
d. Connect the electrical leads.
c. Check flap rigging and adjustments per instructions given in this section.
f. Install access plates and panels.
10/12/83
SURFACE CONTROLS
1K6