SERVICE
STANDARDS
These SERVICE STANDARDS specify the values at which
the engine components will require
REPAIR (replacement is
optional), or
REPLACEMENT (due to maximum component
wear).
It is important to observe these standards for your
engine/generator, and to take action when necessary to main-
tain a high level
of
safety, dependability and performance.
A
MODElS
ENGINES
GENERATORS
60Hz
50Hz
388
Four
11.08TD
8.3
BTO
W27
WMD11.0
WMO
8.3
RD80
All
measurements
are
in
mm
unless otherwise noted.
To convert mm to inches,
multiply
by .03937
DESCRIPTION
ENGINE
COMPRESSION
PRESSURE
INTER-CYLINDER
DIFFERENCE
(max)
INJECTION
ORDER
INJECTION
TIMING
(BTDC
on
compression
stroke)
CYLINDER
HEAD
Bottom
surface
distortion
Valve
seat
angle
(IN
and
EX)
Valve
seat
width
(IN
and
EX)
Valve
seat
sinkage
VALVE
CLEARANCE
(IN
and
EX)
VALVE
Stem
0.0.
Stem
to
guide
clearance
Intake
Exhaust
Valve
face
angle
Valve
head
thickness
(margin
width)
VALVE
SPRING
Free
length
I
nstalled
load/length
Squareness
ROCKER
ARM
Arm
to
shaft
clearance
CYLINDER
BLOCK
Camshaft
hole
1.0.
Front
bushing
Cylinder
bore
Cylinder
bore
oversize
finish
tolerance
Taper
of
cylinder
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
W27A
11.0
BTO
8.3
BTD
MODELS
STANDARD
VALUE
B
C
32
kg/cm2
(at
280
rpm)
B C
2.5
kg/cm
2
B C
1-3-4-2
B C
23°±
1.5°
(Propulsion)
19°
±
1.5°
(Generator)
B C
Within
0.05
B
C
45°
B
C
1.3
-1.8
B C
.12-.13
B C
0.25
(when
engine
is
cold)
C
6.6
B 8
B
C
.012
B C
.025
B
C
45°
C
1.0
B
1.5
C
43
8
45.85
C
14.0
kg
±
0.7
kg/36
mm
8
27.9
kg
±
1.4
kg/37.3
mm
8
C
1.5°
B
C
B
C
45
C
73
B
78
8
C
o
to
0.03
for
each
oversize
8
C
within
0.01
B
MODELS
ENGINES
GENERATORS
60Hz
50Hz
W-33
WMD
12.5
WMD9.4
W-33A
12.SBTD
9.4
BTD
REPAIR
(or
replacement)
Required
at:
26
kg/cm
2
0.1
2.5
41.7
44.5
+0.2
+0.2
NOTE:
Valve
seats
are
a part
of
the
cylinder
head.
A machine
shop
can
install
valve
seats and cut
the
seats
to properly fit
the
valves.
Engines & Generators
8
C
MODELS
ENGINES
GENERATORS
60Hz
50Hz
428
Four
12.5
BTDA
9.4
BTDA
REPLACEMENT
Required
at:
-1
0.10
0.15
0.5
0.5
-15%
-15%
3°
-0.2
+.95
Replace
block
or
sleeve
+.95
Replace
block
or
sleeve
(continued)
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