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 TM 55-1905-220-14-6
3-148.2. OIL FILTER (BY-PASS), HOSES AND HOUSING - MAINTENANCE INSTRUCTIONS.
a. An oil filter of the by-pass type is installed on the engine. However, the size of the orifice on the discharge side of
the filter must not exceed .062 inch (.217 cm) to control the oil flow rate and to provide sufficient oil pressure when the
engine is running at idle speed.
b. When the engine is running, a portion of the lubricating oil is bled off the oil gallery and passed through the by-
pass filter. Eventually all of the oil passes through the filter, filtering out fine foreign particles that may be present.
c. The by-pass filter assembly consists of a replaceable element contained in a shell mounted on a combination base
and mounting bracket. When the shell is in place, the filter element is restrained from movement by a coil spring at the
top. A hollow center stud serves as the outlet passage from the filter as well as securing the
shell in place.
This task covers:
a. Inspection
c. Disassembly
b. Service
d. Reassembly
e. Installation
INITIAL SETUP
Test Equipment
References
None
None
Equipment
Special Tools
Condition Condition Description
None
None
Material/Parts
Special Environmental Conditions
Gasket and element
Do not drain oil into bilges.
P/N MS35345-1
Use the oil/water separation
and recovery system to collect
drained oil. Dispose of properly.
Personnel Required
General Safety Instructions
1
Observe WARNING in procedure.
3-2531
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