Service Standards Table - Mitsubishi diesel engines Service Manual

SERVICE STANDARDS

1. Service Standards Table

Item
Max. speed
(based on the rated speed)
Min. speed
Compression pressure
-1
(at 290 min )
Rated speed
Low idle speed
Valve timing [with
2 mm (0.079 in.)
clearance on the
valve side; cold
engine]
Valve clearance
Fuel injection timing (BTDC)
Rocker arm inner diameter
Rocker shaft diameter
Arm-to-shaft clearance
(oil clearance)
Valve stem diameter
Valve guide inner
diameter
Valve stem-to-guide
clearance
Valve seat angle
Valve head sinkage
Valve seat width
Valve head margin
Installed valve guide protrusion
1 - 12
Nominal
value
Inlet valve
open
Inlet valve
closed
Exhaust valve
open
Exhaust valve
closed
Inlet valve
Exhaust valve
ƒ Ó 19
(0.749)
ƒ Ó 19
(0.749)
ƒ Ó 6.6
Inlet
(0.260)
ƒ Ó 6.6
Exhaust
(0.260)
ƒ Ó 6.6
Inlet
(0.260)
ƒ Ó 6.6
Exhaust
(0.260)
Inlet
Exhaust
°
45
0
1.6
(0.063)
1.5
(0.0591)
10
(0.394)
Standard value
+30
-1
2700 min
-10
-1
1000• } 25 min
2
2.9 MPa (30 kgf/cm )
(27 kgf/cm
[421 psi]
or above
0.29 to 0.39 MPa
2
(3.0 to 4.0 kgf/cm )
[42.07 to 56.57 psi]
0.098 MPa
2
(1.0 kgf/cm )
[14.22 psi]
°
BTDC 15
°
ABDC 41
°
BBDC 54
°
ATDC 10
0.25 (0.01)
0.25 (0.01)
17• ‹
18.910 to 18.930
(0.7450 to 0.7458)
18.880 to 18.898
(0.7438 to 0.7445)
0.012 to 0.050
(0.0004
to 0.0019)
6.565 to 6.580
(0.2586 to 0.2592)
6.530 to 6.550
(0.2572 to 0.2580)
6.600 to 6.615
(0.2600 to 0.2606)
6.600 to 6.615
(0.2600 to 0.2606)
0.020 to 0.050
(0.0008 to 0.0020)
0.050 to 0.085
(0.0020 to 0.0033)
0.25 to 0.75
(0.0098 to 0.0295)
1.30 to 1.80
(0.0512 to 0.0709)
1.35 to 1.65
(0.0531 to 0.0650)
9.5 to 10.5
(0.3743 to 0.4137)
Unit: mm (in.)
Limit Remarks
2.6 MPa
Both oil and coolant
2
)
temperatures at 20 to
[377 psi]
30• Ž (68 to 86• ‹ ‚ e )
or less
Oil temperature at
60 to 95• Ž (140 to
194• ‹ ‚ e )
The theoretical valve
timing figures for
inspection vary from
the actual valve
timing.
Cold engine
• \
• \
0.200
Replace rocker arm.
(0.0079)
6.500
(0.256)
6.500
(0.256)
0.100
(0.004) Replace valve and
valve guide.
0.150
(0.006)
Valve seat width
1.5
(0.0591)
2.5
(0.0985)
Valve
0.5 seat
Valve head
angle sinkage
(0.0197)
• \
Valve
head
margin