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 TM 55-1905-220-14-7
3-172.1. CRANKSHAFT BEARINGS - MAINTENANCE INSTRUCTIONS (Continued).
g. Bearing failures may result from deterioration (acid formation) or contamination of the oil or loss of oil.
An analysis of the lubricating oil may be required to determine if corrosive acid and sulphur are present which
causes acid etching, flaking and pitting. Bearing seizure may be due to low oil or no oil.
h. Check the oil filter elements and replace them if necessary. Also check the oil by-pass valve to make
sure it is operating freely.
This task covers:
a. Removal
b. Inspection
c. Installation
INITIAL SETUP :
Test Equipment
References
Cylinder Diameter Gage
None
J5347-01
Micrometer (with ball end)
Equipment
Special Tools
Condition
Condition Description
Paragraph
Torque wrench
Pump, hand
3-163
Oil Pan Removal
NSN 4930-00-263-9886
3-169
Lube Oil Pump Removed
3-170
Oil Inlet Pipe Removed
Material/Parts
Special Environmental Conditions
None
Do not drain oil into bilges. Use
oil separation and recovery system
to collect drained oil.
Personnel Required
General Safety Instructions
2
None
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
1. Engine
a. Oil pan
1.
Remove oil.
Use a suitable
container.
2. Remove pan.
Refer to para-
graph 3-163.
3-2947
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