Piper COMANCHE PA-24-180 Service Manual page 227

PIPER COMANCHE SERVICE MANUAL
d. Inspect the transmission screw and tube nut (2) for end and side play and ascertain that they are
not distorted or bent.
e. Check that the screw bearing (9) is not loose on the transmission screw or within the transmission
housing. A loose bearing can be determined by holding the transmission and moving the screw up and
down. This check can also be made when the transmission is installed in the airplane, with the landing gear
partially retracted, by applying a load to the emergency extension handle and noting play.
NOTE
On PA-24-180 and PA-24-250 airplanes, Serial Nos. 24-1 to 24-735
ascertain that bearing retainer Kit No. 754 219 consisting of plate,
link, screws and nuts has been installed on the transmission.
f.
Check for wear within the transmission by turning the transmission screw (4) by hand and noting
end play in the transmission drive shaft (24). End play usually indicates a worn thrust bearing or a loose
connection between the thrust bearing and drive shaft. If end play is in excess of 0.015 of an inch, the
transmission should be replaced.
g. The coupling (10) between the transmission and motor may become worn to a point where the
metal inserts in the coupling protrude from the rudder, thus causing chatter. This chatter may be eliminated
by grinding the metal inserts until they are .010 to .015 below the surface of the rubber. This grinding
operation may be repeated until the coupling reaches a minimum diameter of I inch and then should be
replaced.
h. Adjust the motor brake (18) (early type) by adjusting the nut on the brake support rod (22) until
the brake disc clears the highest point on the retraction transmission coupling. Hold the brake disc firmly
against the brake solenoid while making this adjustment.
i. The only adjustment required for the later type motor is to align the brake solenoid unit with the
transmission coupling which is accomplished by adjusting the nut on the brake support rod.
j. Fill the Dura transmission housing with MIL-G-23827 grease and the Dukes transmission housing
with Dukes No. 4 lubricant manufactured by Dukes. Duke transmission is identified by label (Dukes
Astronautics Co.) on transmission housing. Dura transmission is identified by Part No. 1010250 stamped on
transmission housing.
NOTE
Refer to Lubrication Chart, Special Instructions for specific
lubrication instructions of landing gear transmission assembly.
k. Position the transmission cover on the housing and secure with screws.
6-45. Installation Of Retraction Transmission Assembly. (Refer to Figure 6-14.)
a. Ascertain that the transmission is properly lubricated and position it in the transmission well.
b. Align the transmission mounting lug (27) with the hole in the mounting bracket (28) and secure
with pin (12), washer and cotter pin.
LANDING GEAR AND BRAKE SYSTEM
REVISED: 10/3/77