Landing Gear Retraction Load Check - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
6-58.
Ocdtint
Landi.. Gar Rcuaalon Load. (Refer to FilUm 6-19 and 6-20.) After the landint gear
hu been lubricated and property adjUSted u described in the precediDc panpphs. check rctraetion load
by
USlftI
the followiJll procedure,
a. Place the &itplane on jacks. (Refer to
I-wn,.
Section II.)
b. With the ,ear fully extended. disconnect the rftnCtion transmislion auembly by
pullina
up on the
cmC11encyrelcuc lever.
c.
Putially rCUlct the ,ear until it hanp In the neutnl position. by
lUina
the euqency cxtmsion
lever.
d. On airplanes with Serial Nos. 24-1 to 244782 inclusive and 24-4184 to 24-4803 inclusive. remove
the red knob on the cmCTJency extension lever and insraU adapter tool. PIN 26348. on the lever with
att&chilll bolt forward. (Refer to Fipre 6-19.)
e. On &itplana wi:h Serial Nos. 24-4783 and 244804 and up. remove retrae:tion ttansmiuion floor
plate and insu.ll adapter tool. PIN 26347.
in the left socket of the mraaion torque Nbc. (Refer to Figure
6-20.)
f. Ascmain that the shoulder of the adapter is seated on the cxtCftSion handle or on the torque rube
socket.
g. Open the gear motor circuit breaker to prevent mOtor from runnm, duri", ,ear check.
h. Panially retract landing ,ear
uGn,
adapter and install torque wrench on adaptct. alifning the
centerline of the torque wrench
w~th
the ccntcrliM of the rettae:tion torque Nbc.
i. Tum on the mastct switch and slowly puU aft on the torque
wrench
completely remctina the
gear.
j. Observe torque reading when the amber
p i '
up indicator qht initially comes on. The torque
reacting should not exceed limits given in Table VI·l,
TABLE Vl-1. TORQUE FOR EFFECTIVE WRENCH LENGTH
EFFECTIVE WRENCH
UNC~
MAXIMUM TORQUE
(INCHES)
(FOOT POUNDS)
18 111
16 106
104-
100
12 93
10
84
k. If torque exceeds the limits specified. check for the (oUowin"
1. Insufficient lubrication. possible bindinJ. improper adjuStment and damaged parts of the
retraction system.
2. Check the up limit switch for proper adjustment. It may not actuate soon enough causing the
main ,ear to be pulled too hard against the rubber stop blocks. exerting excessive load on the system. The
main gear should fit snugly against the rubber stop blocks
in
the wheel well.
LANDING GEAR AND BRAKE SYSTEM
ISSUED: B/18n2
IJ23