TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Bearings, Main (001-006)
Section 1 - Cylinder Block - Group 01
Page 1-13
Improper maintenance of the lubricating system is the pri-
mary cause of reduced main bearing life.
CAUTION
Increased end-loading of the engine and its driven units
at the front or rear of the engine can cause damage to
the thrust bearings.
Preparatory (001-006-000)
WARNING
To avoid personal injury, avoid direct contact of hot oil
with your skin.
Drain the lubricating oil. Refer to Procedure 007-025.
Remove the lubricating oil pan and gasket. Refer to Pro-
cedure 007-025.
NOTE: Before removing the main bearing caps, make cer-
tain that the caps are clearly marked for their location on
the lubricating oil cooler side of the main bearing cap.
Remove (001-006-002)
NOTE: Before removing the main bearing caps, make sure
that the caps are clearly marked for location on the lubri-
cating oil cooler side of the main bearing cap.
L-691
