Piper Navajo PA-31 Service Manual page 473

PIPER NAVAJO SERVICE MANUAL
e.
Drain the engine oil, if desired, and reinstall drain plug.
f.
Remove the propeller per Paragraph 8-16.
g. Disconnect the starter cable at the starter, remove the cable clamps
at the left side of the engine
and engine mount, and draw the cable aft through the engine baffle to the firewall.
h. Disconnect the alternator primary cable that leads from the
firewall at the filter box located on
the right lower side of the engine mount. Disconnect the field
wire.
i.
Disconnect the electrical leads to the oil temperature sender
at the accessory housing, the
cylinder heat temperature probe at the aft outboard cylinder
and the exhaust temperature at the aft side of
the exhaust manifold.
j.
Disconnect the magneto ground leads and the retard spark
lead of the left magneto at the
magneto.
k.
Disconnect the propeller De-Icer electrical wires (optional equipment).
1.
Disconnect the pressure pump hose at the upper left side of the
firewall.
m.
Disconnect the tachometer drive cable at the engine accessory
housing.
n.
Disconnect the throttle and mixture control cables at the injector,
the governor control cable at
the governor and the alternate air door control cable at the left side
of the air filter plenum. Disconnect the
cables from their attachment clamps.
o.
Disconnect the hydraulic pressure line at the hydraulic oil filter
on the firewall.
p.
Disconnect the hydraulic suction, fuel supply, fuel flow pressure, fuel pressure,
air deck pressure,
oil pressure, manifold pressure, de-icer (optional equipment) lines at the firewall.
q.
Attach a one-half ton (minimum) hoist to the hoisting hooks
and relieve the tension on the
engine mount.
r.
Remove the nuts and washers from the bolts that attach the
engine mount to the firewall.
s. Remove the engine mount mounting bolts and swing the engine a few
inches from the firewall.
Check the engine for any attachments remaining to obstruct its removal.
t. Swing the engine clear and place on a suitable support.
8-27. INSTALLATION OF ENGINE. The installation of
either engine is basically the same procedure,
though the routing of some wires, cables, lines, etc. does vary
between engines. Before starting, (Refer to the
latest revision of Lycoming Service Instruction No. 1241.) ascertain that all components
of the engine such as
engine mount, turbocharger unit, exhaust stacks, etc., are installed.
NOTE
When it is necessary to remove or replace any part of the
exhaust
manifold system, refer to the latest revision of Lycoming
Service
Instruction No. 1320.
a.
With a one-half ton hoist (minimum) attached, swing the
engine in position.
b.
Align the mounting holes in the engine mount with the mounting
holes in the firewall. Install the
mounting bolts through from the aft side of the firewall. Install
washers and nuts, and torque.
c. Connect the hydraulic suction, fuel supply, fuel flow pressure,
fuel flow, air deck pressure, oil
pressure, manifold pressure, and de-icer (if installed) lines
to the firewall fittings.
d. Connect the hydraulic pressure line at the hydraulic oil filter
on the firewall.
e.
Connect the throttle and mixture control cables to the injector,
install cable clamps and rig per
Paragraph 846.
f. Connect the governor control cable to the governor, install
cable clamps and bracket and check
rigging per Paragraph 8-24.
g.
Connect the alternate air door control cable to the air door control
arm and adjust the cable end
on the control arm so that when the control knob in the
cockpit is full in, there will be approximately
one-eight inch between the control arm roller and the fully
closed door.
h.
Connect the tachometer drive cable to the drive on the accessory
housing.
Revised: 9/24/81
POWER PLANT
2H23