Rockwell Commander 112 - Page 93

SECTION IV
POWER PLANT
AND PROPELLER
MAINTENANCE MANUAL
ROCKWELL
COMMANDER
112/B/TC/TCA
OIL TILLER
ACCESS DOOR
INDUCTION
AIR INTAKE
MODELS 112/B
OIL TILLER
ACCESS DOOR
OIL COOLER
AIR INTAKE
MODELS 112TC/TCA
X241087
Figure 4-11. Engine Cowling
a. Install fuselage tail stand.
b. Ignition switch - OFF.
c. Remove propeller (see Propeller Removal in-
structions 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 flow pressure
and vent lines.
4. Oil pressure gage line.
i. Disconnect induction air system.
j. Disconnect flexible drive from tachometer.
k. Disconnect throttle and mixture control cables
from servo regulator.
1. Disconnect electrical wiring from engine.
m. Disconnect engine
ground wire.
n. Disconnect propeller control cable from prop
governor.
o. Secure control cables at firewall to prevent
entanglement in engine when removing engine.
p. Remove muffler assembly and exhaust stacks
from engine, and cover cylinder exhaust ports.
4-22
q. Attach a one-half ton (minimum) hoist to
engine
lifting eye and tighten hoist cable slightly to
relieve weight on engine mount attach bolts.
r. Disconnect oil and fuel drain lines, engine-
driven fuel pump drain line and engine breather line.
Raising engine too high will place a
strain on attach bolts and hinder re-
moval.
s. Check engine to ensure all items attaching
engine and accessories to airframe are disconnected.
t. Remove engine mount attach bolts.
u. Remove engine from airframe.
When lifting engine from mount, use
extreme care to prevent damage to
engine mount and
airframe.
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**