TM 5-2420-230-24-2
Connecting Rod (001-014)
B3.9 and B5.9 Series Engines
Page 1-44
Section 1 - Cylinder Block - Group 01
Bearing clearance can also be determined with Plastigauge
during engine assembly.
Test (001-014-012)
Crankshaft and Main Bearings
Improper maintenance of the lubrication system is also the
primary cause of reduced main bearing life.
A malfunction of the crankshaft/main bearing will usually
be detected by reduced lubricating oil pressure. If the rod
bearings continue operation with low-lubricating oil pres-
sure, this will lead to a rapid deterioration of the bearings
and eventually will produce a knocking sound.
A connecting rod knock occurs when the engine is not
loaded. Verify by first applying load and then unloading and
listening for the knock.
Install (001-014-026)
Install the pistons and connecting rod assemblies. Refer to
Procedure 001-054.
L-722