Crankcase, Crankshaft And Main Bearing - Disassemble And Inspect - Mitsubishi S6R Series Service Manual

5. Crankcase, Crankshaft and Main Bearing - Disassemble and Inspect

Understanding of the current engine condition before disassembling is very important to know the cause of trouble and do the
efficient work.
Depending on the maintenance work or purpose, it is desirable to inspect some of the following items before proceeding with
any job.
Crankshaft End Play - Measure
Scale deposit, flaw, crack,
oil hole clogging
Double nozzle
holes spec
Valve operation,
oil hole clogging,
oil injection pipe bend,
deformation
Scratch, crack, dent,
oil hole clogging, wear
Inner and outer peripheral
surface flaw, corrosion, peeling
Crankcase, Crankshaft and Main Bearing - Disassemble and Inspect
Disassembling Sequence
1 Main bearing cap bolt
2 Main bearing cap
3 Lower main bearing
4 Lower thrust plate
5 Crankshaft (S6R: approx 285 kg [628 lb])
(S6R2: approx 300 kg [661 lb])
6 Upper main bearing
Single nozzle hole spec
9
8
3
2
Chapter 5 DISASSEMBLY OF BASIC ENGINE
6
7 Upper thrust plate
8 Check valve (One jet hole spec)
Eye bolt (Two jet hole spec)
9 Piston cooling nozzle
10 Crankcase (S6R: approx 530 kg [1168 lb])
(S6R2: approx 590 kg [1301 lb])
10
Inner and outer
peripheral surface flaw,
corrosion, peeling
7
Peeling, wear, contact
5
4
Crack
Flaw
1
5-21