TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Bearings, Main (001-006)
Section 1 - Cylinder Block - Group 01
Page 1-15
Install the pin into the lubricating oil hole in the crankshaft.
Rotate the crankshaft so the pin pushes against the end of
the main bearing opposite the tang. Remove the main
bearing.
Follow this procedure to remove the other main bearings.
Clean (001-006-006)
CAUTION
Do not use a scraper or a wire brush. The bearings can
be damaged.
WARNING
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to avoid
personal injury.
WARNING
Wear appropriate eye and face protection when using
compressed air. Flying debris and dirt can cause bodily
injury.
NOTE: Make sure the bearings are marked for location.
The bearings must be installed in their original location if
used again.
Use solvent and a soft bristle brush to clean bearings.
Dry with compressed air.
Inspect for Reuse (001-006-007)
Inspect all main bearing caps and main bearing crankshaft
journals for dents, cracks, deep scoring, overheating, and
other damage.
L-693
