Piper COMANCHE PA-24-180 Service Manual page 500

PIPER COMANCHE SERVICE MANUAL
d. When storing the cells, store in such a manner that their shipping containers are placed
level and will not crush the cells. When ecessary to stack more than one high, see that the con-
tainers are placed squarely on each other so as to preclude any danger of slipping and the sharp
edge of one container perforating another.
8-7. Fuel Cell Cempartment.
a. Thoroughly clear the cell compartment of all fittinp,
trimmings, loose washers, bolts, or
nuts.
b. Rolld off all sharp edges of the fuel cell compartment.
c. Inspect the fuel cell compartment just prior to fuel cell installation.
d. Tape over all sharp edges and all rough rivets.
8-8. Molded Nipple Fittings. The molded nipple fitting is a lightweight fitting developed for
ease in installation in certain locations in the
aI
ane. In order to get the best service from this
type fitting, it is necessary to exercise certain precautions at the time of installation. The spe-
cific precautions other than the general care in handling are as follows:
a. Insert the flow tube into the fitting until the end is flush with the inside edge of the nipple.
b. The hose clamp must be clear of the end of the fitting by 1/4 inch where possible.
c. Locate the hose clamp on the fabric reinforced area of the nipple.
d. Tighten the hose clamp finger-tight. Do this once. Do not re-tighten unless the hose clamp
is loosened completely and allowed to set far 15 minutes before re-tightening.
e. Do not use sealing paste or gasket compound.
f. Apply a thin film of Simonize Wax to metal flow tubes to facilitate installation and removal.
8-9. Installation.
a. Inspect the fuel cell for any shipping or storage damage.
b. Check to be sure that the fuel cell is warm enough to flex. Do not use sharp tools such as
screw dnvers, files, etc., for instllation
purposes. Note the torque limits for the sender unit and
filler unit placarded on the fuel cell.
c. Place tape or another protective material over the edges of the wing cell access hole to
prevent damaging the cell. Note the location of each cell fastener bracket, and on the outboard
cell of the PA-24-400 the direction the button pin fastener must be drawn to secure it to its
bracket. Fold the cell with fasteners attached, insert it through the wing opening and unfold.
NOTE
Do not let the fuel cell remain in the folded or collapsed condition
any longer than absolutely necessary.
d. A cell may be fastened by starting at the center under side of the ceil, working toward each
end. inserting the nipple fitting through the wing and finishing at the top access hole. Early fuel
cells have locating tabs attached to the inside of the cells. By gripping these tabs, the location.
installation and checking of the fastener to their brackets may be accomplished. Late cells do
FUEL SYSTEM
ISSUED: 8/11/72
2 122