Piper Navajo PA-31 Service Manual page 474

PIPER NAVAJO SERVICE MANUAL
i. Connect the pressure hose to the fitting on the upper left side of the firewall.
j. Connect the propeller de-icer electrical leads (if installed).
k.
Connect the magneto ground leads and the retard spark lead to the left magneto.
1. Connect the electrical leads to the oil temperature sender at the accessory housing, the cylinder
head temperature at the probe at the aft outboard cylinder and the exhaust temperature probe at the aft
side of the exhaust manifold.
m. Connect the alternator primary cable to the filter box located on the lower right side engine
mount. Connect the field wire.
n. Route the starter cable through the lower side of the left aft engine baffle and attach the cable
end to the starter. Secure cable with clamps at the engine mount and the engine.
o. Ascertain that the magneto switches are off and install the propeller per Paragraph 8-18.
p.
Install the proper grade and amount of engine oil.
q. Connect the battery ground wire at the battery.
r. Turn on the fuel valve, open the throttle full and turn on the electric fuel pump and check the
fuel lines for leaks.
s. Install the access plates on the engine nacelle and the cowling per Paragraph 8-6.
t.
Perform an engine operational check.
8-28. ENGINE SHOCK MOUNTS.
8-29. REPLACING ENGINE SHOCK MOUNTS. The engine shock mounts may be replaced with the
engine installed as well as removed from the airplane. Refer to Figure 8-6 for the arrangement of the shock
mount assemblies. The top shocks are assembled so the silver colored shocks are aft and the gold colored
shocks are forward. The lower shock mounts are installed opposite of the top shock mounts. The procedure
described in this paragraph is with the engine installed.
a. Remove the engine cowling. (Refer to Paragraph 8-4.)
b. Attach a one-half ton (minimum) hoist to the engine hoisting hooks and relieve tension from the
shock mounts.
c.
Loosen the upper shock mount attachment nuts.
d. Remove the lower mount attachment nuts, washers, forward shock mounts and spacers.
e. Remove the lower attachment bolts just far enough to allow the aft shock mounts to be removed.
The bushing in each lower mount must be removed with the bolt.
f. Raise the nose of the engine enough to remove the lower aft shock mounts and replace with new
ones.
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.
Revised: 9/23/80
POWER PLANT
2H24