Rockwell Commander 112 - Buildup

ROCKWELL
COMMANDER
112/B/TC/TCA
MAINTENANCE MANUAL
SECTION IV
POWER PLANT
AND PROPELLER
MODELS 112TC/TCA. The engine mount (Figure 4-10)
can be removed with the engine, if desired. If the en-
gine is being returned to the manufacturer or will not
be operated within a seven day period comply with
storage instructions contained in Section IT. In the
following
instructions, the engine is being removed
from the mount.
a .
Install fuselage tail stand.
b. Ignition switch - OFF.
c. Remove propeller (see Propeller Removal
instructions in this section).
d. Remove engine cowling (see Figure 4-11).
e . Drain engine oil.
f. Drain fuel lines at engine.
g. Disconnect oil lines from oil cooler.
h. Disconnect following lines from engine and
cap or plug lines and fittings:
1 . Vacuum line.
2 . Fuel supply line.
3. Manifold pressure and fuel pressure and
vent lines.
4. Oil pressure gage line.
i. Disconnect oil lines from turbocharger and cap.
j. Remove turbocharger pressure relief valve
elbow.
k. Disconnect throttle and mixture control cables
from carburetor.
1. Remove carburetor.
m. Remove turbocharger strut braces.
n. Disconnect flexible tachometer drive from
engine.
o. Disconnect electrical wiring from engine.
p. Disconnect engine ground wire.
q. Disconnect propeller control cable from prop
governor.
r. Secure control cables at firewall to prevent
entanglement in engine when removing engine.
s. Attach a one-half ton (minimum) hoist to engine
lifting eye and tighten hoist cable slightly to relieve
weight on engine mount attach bolts.
t. Disconnect oil and fuel drain lines, engine drive
fuel pump drain line and engine breather line.
Raising engine too high will place a
strain on attach bolts and hinder re-
moval.
u. Check engine to ensure all items attaching en-
gine and accessories to airframe are disconnected.
v. Remove engine mount attach bolts.
w . Remove engine from airframe.
When lifting engine from mount, use
extreme care to prevent damage to
engine mount and
airframe.
BUILDUP
MODELS 112/B. The basic engine, as received from
the manufacturer, requires the addition of certain ac-
cessories, wiring, ducting, and lines prior to instal-
lation. This is accomplished during engine buildup.
It is recommended that the old and new engine be lo-
cated side by side, and a direct transfer of parts be
made according to the sequence provided.
a. Observe following practices during engine
buildup.
1. Thoroughly clean and inspect removed
parts for serviceability prior to installation.
2. Do not disturb accessory pad covers,
plugs, or caps from openings in new engine
prior to installing accessories or making con-
nections.
3. Use only new gaskets for equipment in-
stallation.
4. Inspect hoses for swelling, chafing, cuts,
or damaged ends.
b. Install parts and accessories as follows:
1. Baffles - Secure.
2. Exhaust manifold segments - Secure.
3. Alternator - Secure.
4. Oil drain valve - Secure.
5. Oil temperature bulb installed.
6. Cylinder head temperature adapter and
thermocouple on left front cylinder.
7. Spark plugs· - torque top plugs to 360-420
inch-pounds, bottom plugs finger tight only
(lower
spark plugs torqued after engine pre-
oiling procedure).
8. Induction air box installed at servo regu-
lator.
9. Fuel pump - Secure.
10. Vacuum pump - Secure.
11. Propeller governor - Secure.
12. Inspect engine assembly for miSSing or
loose nuts and screws.
MODELS 112TC/TCA. The basic engine, as received
from the manufacturer, requires the addition of cer-
tain accessories, wiring, ducting, and lines prior to
installation. This is accomplished during engine build-
up. It is recommended that the old and new engine be
located side by side, and a direct transfer of parts be
made according to the sequence provided.
a. Observe the following practices during engine
buildup.
1 . Thoroughly
clean and inspect removed
parts for serviceability prior to installation.
2. Do not disturb accessory pad covers,
plugs, or caps from openings in new engine
prior to installing accessories or making con-
nections.
3. Use only new gaskets for equipment in-
stallati on .
4. Inspect hoses for swelling, chafing, cuts,
or damaged ends.
b. Install parts and accessories as follows:
1. Baffles - Secure.
4-23
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**