TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-71
Lubricating Oil Pressure Low (Continued)
Cause
Correction
Inspect the lubricating oil pump. Refer to
Lubricating oil pump is malfunctioning
.......
Procedure 007-031.
OK
L
ubricating oil suction or transfer tube is loose
Remove and inspect the oil pan or suction
.......
or broken, or the gasket or o-rings are leaking
tube. Refer to Procedure 007-025.
OK
M
Check the torque on the main bearing
ain bearing capscrews are loose, worn, or
capscrews. Inspect the capscrews for wear.
.......
not tightened correctly
Refer to Procedure 001-006.
OK
M
Inspect the main bearings for damage,
ain bearings are damaged or worn, or the
excessive wear, and the correct part number.
.......
wrong bearings are installed
Refer to Procedure 001-006.
OK
C
Inspect the camshaft journals and No. 1
amshaft journals and No. 1 bushing are
.......
bushing for wear. Refer to Procedure 001-008
severely damaged
or 001-010.
L-655
