Rockwell Commander 112 - Page 30

ROCKWELL
COMMANDER
112/B/TC/TCA
MAINTENANCE MANUAL
SECTION IT
SERVICING
AND
INSPECTION
MODEL
112B
MODEL 112
AIR
FILTER
HOUSING
/AIR FILTER
'~I
X2438
X222
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MODEL 112TC/TCA
I
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Am FILTER
~ "
~ Am FILTER
~ HOUSING
X2434
Figure 2- 6. Induction Air Filter
metal particles are found on either the oil suction
screen or filter element, accomplish engine opera-
tional check and oil screen and filter element inspec-
tion to determine if the engine should be continued in
service. To clean the engine oil screen, soak and
wash screen in cleaning solvent and dry with moisture
free compressed air. The filter element should be
replaced; however, before replacing the filter ele-
ment, remove the outer perforated paper cover; and
using a sharp knife, cut through the folds of the ele-
ment at both ends, close to the metal caps. Carefully
unfold the pleated element and examine the material
trapped in the filter for evidence of internal engine
damage such as chips or particles from bearings.
In new or newly overhauled engines, some small
particles of metallic shavings may be found, these
are generally of no consequence and should not be
confused with particles produced by impacting,
abrasion or pressure. When metal particles are
found in the oil screen and filter element of an engine
that has been in use for a period of time, accomplish
the following steps:
a. Install new or cleaned oil sc reen and filter
element and fill sump with new oil.
b. Operate engine until cylinder head temperature
is within green range. Operate engine through various
power settings and observe oil pressure and oil tem-
perature readings for erratic indication. Allow engine
to run an additional 15 minutes.
c. Shut engine off.
d.
Drain oil sump.
e. Remove screen and filter element and repeat
inspection for metal particles. If metal particles are
present, engine overhaul is required. Engine may be
returned to service if screen and filter element are
free of metal particles. Consult nearest Lycoming
Representative if condition of engine is questionable.
Oil Suction Screen Installation
a. Locate new gasket on oil suction screen plug
assembly and install in engine.
b. Tighten plug until underside of head or flange
makes contact with face of sump, then tighten to a
maximum of 50 inch-pounds additional torque.
Full Flow Oil Filter Installation
a. Install new copper gasket on stud and place
shell and element on stud.
b. Coat rubber gaskets with clean engine oiL This
allows rubber gaskets to seat properly under torque
when tightening stud.
c . Install flat rubber gasket on shell edge.
d. Install mounting plate on stud.
e. Install nylon nut on stud threads and run up
finger tight against mounting plate so assembly will
be held as a unit until installed on adapter.
2-9
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**