Piper Navajo PA-31 Service Manual page 463

PIPER NAVAJO SERVICE MANUAL
f. Should any of these checks show excess wear. corrosion or damage, the transmission or its
components should be replaced.
g. After the transmission screw and tube have been cleaned and dried, a coating of Aircraft Grease
and Actuator Grease. MIL-G-23827. should be applied to the screw on Dukes transmissions. Use
MIL-G-7118 for Dura transmissions.
NOTE
If for any reason Dukes transmission is disassembled leave set
screw on the transmission tube loose and put a drop of loctite on
head of screw to retain it in place.
h. When the transmission assembly is disassembled for any reason, or at 500 hours. it should be
repacked 3/4 minimum full with Dukes Formula No. 2 P N 2196-74-1 grease (for Dukes units) or I 2 full
with MIL-G-7118 grease (for Dura units).
8-10. INSTALLATION OF COWL FLAP TRANSMISSION. (Refer to Figure 8-2.)
a.
Install the torque tube (11) with bearing blocks (14). Tighten the bearing block bolts after the
tube and both blocks are in position.
b. Position the transmission assembly on its mounting bracket (7) and secure. Allow the
transmission to rotate on its mounting bolt.
c. Attach the transmission actuating rod (9) on the left torque tube arm (15). Tighten connecting
bolt finger tight and safety.
d. Attach the arm extensions (2) on the torque tube arms and secure with rivets.
e. Connect the electrical leads.
f. Check adjustment of cowl flap per Paragraph 8-11 and position sender per 8-14.
g. Install access plates.
8-11. RIGGING AND ADJUSTMENT OF COWL FLAP. (Refer to Figure 8-2.)
a. Allow the transmission tube (5) to be motored to its full extended position.
b. With the tube (5) at full extension, loosen the jam nuts (23) on the cowl flap linkage rods (12)
and adjust each rod to allow the flap to fit flush with the engine cowl and support assembly (31).
c. Tighten the jam nuts on the cowl flap linkage rods.
8-12. REMOVAL OF COWL FLAP POSITION SENDER ASSEMBLY. (Refer to Figure 8-2.)
a.
Remove the access plate located on top of the engine nacelle aft of the firewall.
b. Disconnect the electrical leads from the sender unit (16).
c. Loosen the bolt assembly (17) that locks the arm (19) on the sender shaft (18).
d. Turn off the lock nut that secures the sender from its mounting bracket.
8-13. INSTALLATION OF COWL FLAP POSITION SENDER ASSEMBLY. (Refer to Figure 8-2.)
a. Start the sender unit (16) through its mounting hole far enough to start the lock nut and the
sender arm (19) on its shaft.
b. Position the sender by placing the index tab on the sender into the index slot in the mounting
bracket and secure the sender. Allow the arm free to rotate on its shaft (18) until the sender is rigged to the
position indicator.
c. Connect the electrical leads to the sender.
d.
Rig the sender per Paragraph 8-14.
e. Install access plate.
Revised: 1/29/82
POWER PLANT
2H13