PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 1
Nov 30/06
5E23
79-20-00
DISTRIBUTION
Oil Cooler
A. When installing fittings in the oil cooler, care should be used to prevent excessive torque being
applied to the cooler. When a rectangular fitting boss is provided, backup wrench should be used,
employing a scissor motion, so that no load is transmitted to the cooler. When the oil cooler has a
round fitting boss. care should be taken not to permit excessive torque on the fittings.
B. If a pipe thread fitting is used, it should be installed only far enough to seal with sealing compound.
C. Apply Lubon No. 404 to all male pipe thread fittings; do not allow sealant to enter the system.
D. Oil line routing should provide .50 in, minimum clearance between oil line and engine, engine mount
or cowling, except for oil outlet line where it crosses over the engine mount. This area should have a
clearance of .75 in. minimum.
E. If fitting cannot be positioned correctly using a torque of 9 to 15 foot-pounds, another fitting should
be used.
F. When attaching lines to the cooler, a backup wrench should be used.
G. After installation, inspect the cooler for distorted end cups.
H. Run-up engine. After run-up, check for oil leaks.
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