Installation Of Oil Cooler - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
NOTE
Care should be taken not to introduce adverse stresses on the
control cables, electrical cables, hoses and other items attached to
the engine while hoisting the engine.
g. Lower the engine, slide the attachment bolts with bushings into place and install the spacers,
forward shock mounts, washers and nuts. Start nuts only a few threads.
h.
Remove the upper mount attachment bolts, nuts, washers, heat shield, forward shock mounts
and spacers.
i. Lower the engine enough to replace the upper aft shock mounts. Raise the engine into position.
j. Install the spacers, forward shock mounts, heat shield, mounting bolts, washers and nuts. Rotate
the shield to provide greatest protection against exhaust heat.
k. Tighten attachment bolts 34 to 42 foot-pounds.
8-32. INSTALLATION OF OIL COOLER.
a. When installing fittings in the oil coolers, 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 scaling compound.
c. Apply Lubon No. 404 to all male pipe thread fittings; do not allow sealant to enter the system.
d. If fitting cannot be positioned correctly using a torque of 10to 15 foot-pounds. another fitting should
be used.
e. When attaching lines to the cooler, a backup wrench should be used.
f. After installation, inspect the cooler for distorted end cups.
g. Run-up engine. After run-up, check for oil leaks.
Reissued: 9/23/80
POWER PLANT
2H19