Maintenance Service Data; General; Basic Engine - Mitsubishi Heavy Industries SL Series Service Manual

SERVICE DATA

1. Maintenance service data

1.1 General

Inspection point
Maximum rotation speed
(rated rotation speed used as reference)
Minimum rotation speed
Compression pressure (at 290 min
Rotated speed
Lubricating oil
pressure
Low idling speed
Inlet
Valve timing
Exhaust
Inlet
Valve clearance
Exhaust
Fuel injection timing (before TDC)

1.2 Basic engine

Inspection point
Rocker arm inside diameter
Rocker shaft outside diameter
Rocker arm
Clearance between rocker arm and rocker
shaft
(oil clearance)
Valve stem outside diam-
eter
Valve guide inside diam-
Valve
eter
Clearance between valve
stem and valve guide
2-2
Table 2-1 Maintenance service data table - General
Nominal
(Varies depending on specification of desti-
nation)
-1
)
open
closes
open
closes
Table 2-2 Maintenance service data table - Basic engine (1 / 3)
Nominal
ø 18.9
[0.744]
ø 18.9
[0.744]
ø 6.6
Inlet
[0.260]
ø 6.6
Exhaust
[0.260]
ø 6.6
Inlet
[0.260]
ø 6.6
Exhaust
[0.260]
Inlet
Exhaust
Standard
2.9 MPa
{30 kgf/cm²} {27 kgf/cm²}
[421 psi] or above [377 psi] or less
0.29 to 0.39 MPa
{3.0 to 4.0 kgf/cm²}
[42 to 57 psi]
0.098 MPa
{1.0 kgf/cm²}
[14 psi]
BTDC 15°
ABDC 41°
BBDC 54°
ATDC 10 °
0.25 [0.0098]
0.25 [0.0098]
17°
Standard
18.910 to 18.930
[0.7445 to 0.7453]
18.880 to 18.898
[0.7433 to 0.7440]
0.012 to 0.050
[0.0005 to 0.0020]
6.565 to 6.580
[0.2585 to 0.2591]
6.530 to 6.550
[0.2571 to 0.2579]
6.600 to 6.615
[0.2600 to 0.2604]
6.600 to 6.615
[0.2600 to 0.2604]
0.020 to 0.050
[0.0008 to 0.0020]
0.050 to 0.085
[0.0020 to 0.0033]
Limit Remark
2.6 MPa
When oil and water temperatures
at 20 to 30°C [68 to 86°F]
Oil temperature
at 60 to 70°C [140 to 158°F]
With 2 mm [0.079 in.] clearance
on valve side, when cold.
Values are only for checking
valve timing and are different
from the actual ones.
When engine is cold
Limit
0.200
Replace rocker arm
[0.0079]
6.500
[0.2559]
6.500
[0.2559]
0.100
[0.0039]
Replace valve and valve
guide
0.150
[0.0059]
Unit: mm [in.]
Unit: mm [in.]
Remark