Baudoulin 4M11G User Manual

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
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Appendix A Fit Clearances for Main Parts of Diesel Engine
(Reference value)
SN. Ite
m
Theoretical value
(
mm
)
1 Main bearin
g
clearance 0.08～0.11
2
Connecting rod bearing clearance
0.07～0.10
3 Crankshaft end
p
la
y
0.04～0.25
4
Axial clearance of connecting rod plane
0.30～0.50
5 Clearance between connecting rod small
end and
p
iston
p
in
0.03～0.08
6 Clearance between
p
iston
p
in boss 0.003～0.015
7 Clearance between valve stem and
valve
g
uide
0.03～0.06
8
Cold state piston ring
Working opening
1st ring 0.35～0.55
2nd ring 0.75～1.05
Oil ring
0.3～0.6
9
End clearance of piston
ring in cold state
1st ring
2nd ring
0.06～0.095
Oil rin
g
0.05～0.085
10
Valve bottom sink in cylinder head
1.0～1.45
11 Protrusion of cylinder liner top above
en
g
ine bod
y
to
p
0.05～0.10
12
Camshaft axial clearance
0.10～0.29
13 Camshaft bearin
g
clearance 0.04～0.08
14 Clearance between tappet and value
ta
pp
et hole
0.006～0.035
15 Gap between piston top and cylinder
head bottom surface (compression
clearance
)
0.88～1.11
16 Protrusion of piston top above top plane
of c
y
linder block
0.25～0.57
17
Valve clearance
(Cold state)
Intake
0.18~0.25
Exhaust
0.28~0.35
18
Clearance between rocker arm and
rocker arm shaft
0.016～0.052
19
Clearance of secondary
balance
mechanism
Radial
direction
0.03～0.07
Axial direction 0.20～0.40
20
Backlash between mating teeth of timing
g
ear and intermediate
g
ea
r
0.07～0.24

Baudoulin 4M11G Specifications

General

Brand	Baudoulin
Model	4M11G
Category	Engine
Language	English