Mitsubishi S6R Series User Manual

5-21
Chapter 5 DISASSEMBLY OF BASIC ENGINE
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
Crankcase, Crankshaft and Main Bearing - Disassemble and Inspect
Single nozzle hole spec
Double nozzle
holes spec
Scale deposit, flaw, crack,
oil hole clogging
Valve operation,
oil hole clogging,
oil injection pipe bend,
deformation
Scratch, crack, dent,
oil hole clogging, wear
8
9
Inner and outer peripheral
surface flaw, corrosion, peeling
2
3
Flaw
Crack
4
1
Peeling, wear, contact
5
Inner and outer
peripheral surface flaw,
corrosion, peeling
7
10
6
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
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])

Mitsubishi S6R Series Specifications

General

Brand	Mitsubishi
Model	S6R Series
Category	Engine
Language	English