Service manual
SERVICE
DATA
I
TOLERANCES
AND
LIMITS
20
KW
60Hz
Generator/16KW
50
Hz
Generator
71
I-FOUR
71
C-FOUR
VALVE
GUIDE,
VALVE
AND
VALVE
SPRINGS
Valve Face Angle (Intake)
(Exhaust)
Rear Oil
Seal
Insert Limit
Valve
Spring Squareness Limit (Inner)
(Outer)
Free length
of
Valve
Spring
(Inner) Standard
Limit
(Outer) Standard
Limit
45°
30"
mm(in)
6.35 - 7.62 (0.250 - 0.300)
1.25
(0.049)
1.37
(0.054)
43.6 (1.717)
42.0 (1.654)
55.7 (2.193)
52.9
(2.083)
Valve
Spring Constant (Inner) 2.02kglmm
(1131b/in)
(Outer) 2.16kglmm (121lb/in)
CONNECllNG
RODICONNECllNG
ROD
BEARING
Length (Center to Center)
Maximum Allowable
Twist
Small Bore
End
Clearance between Piston Pin & Small Bore
End
Standard
Limit
Connecting Rod Side Clearance Standard
Limit
Crankpin Bearing Clearance Standard
Oil Clearance
Wear
Limit
Crank
Pin Dia. Available Undersize Bearing
0.254
(0.01)
0.508 (0.02)
0.762 (0.03)
CRANKSHAFT
AND
MAIN
BEARING
Crankpin Diameter Standard
Wear
Limit
Grinding Limit
Main Journal Dia. Available Undersize Bearing
0.254 (0.01)
0.508 (0.02)
0.762 (0.03)
Available Oversize
Thrust
Bearing
Crankshaft Run-Out
Crankshaft
End
Play Standard
Limit
CYLINDER
BLOCK,
PISTON
AND
PISTON
PIN
Limit
of
Distortion
of
Cylinder Block
Cylinder Liner Diameter
Wear Limit
of
Cylinder Liner
Liner Protrusion above Cylinder Block
mm(in)
173.Q12
-
173.063
(6.811
- 6.813)
0.05 per
100
(0.002 per 3.94)
28.012 -
28.033
(1.103 -
1.104)
0.012 -
0.031
(0.0005 - 0.0015)
0.05 (0.002)
0.239
- 0.330 (0.009 - 0.013)
0.4
(0.016)
0.012 -
0.031
(0.0005 - 0.0012)
0.05 (0.002)
56.868
-
56.871
(2.2389
-
2.2391)
56.604
-
56.617
(2.2285
-
2.2312)
56.350
-
56.363
(2.2185
-
2.2191)
mm(in)
57.112 - 57.125
(2.248
- 2.249)
0.05 (0.002)
56.35
(2.218)
69.558
-
69.571(2.7385
-
2.7391)
69.304
-
69.317
(2.7182
-
2.7291)
69.050
-
69.063
(2.7185
-
2.7191)
0.178
(0.007)
0.05
(0.002)
0.140 - 0.390 (0.005 - 0.015)
0.4
(0.016)
mm(in)
0.10
(0.004)
Positions 1 + 2
0.25
(0.010)
Positions 3 + 4
88.925 -
88.950
(3.501
- 3.502)
0.20
(0.008)
0.101
0
(0.004
-
0)
'-..'WESJERBEICE
I Engines & Generators
65
45°
30"
mm(in)
6.35 - 7.62 (0.250 - 0.300)
1.25
(0.049)
1.37
(0.054)
42.0
(1.654)
42.0 (1.654)
43.6 (1.717)
43.6 (1.717)
2.02kglmm
(1131blin)
2.16kglmm (121lb/in)
mm(in)
173.Q12
-
173.063
(6.811
- 6.813)
0.05 per
100
(0.002 per 3.94)
28.012 - 28.033
(1.103
-
1.104)
0.014 - 0.041 (0.0006 - 0.0016)
0.05 (0.002)
0.239
- 0.330 (0.009 - 0.013)
0.4 (0.016)
0.012
-
0.031
(0.0005 - 0.0012)
0.05 (0.002)
64.746
-
64.733
(2.5485
-
2.5491)
64.479
-
64.492
(2.5385
-
2.5391)
64.225
-
64.238
(2.5285
-
2.5291)
mm
(in)
53.0 - 53.013 (2.0866 - 2.0861)
0.05 (0.002)
56.35 (2.218)
52.733
-
52.746
(2.0761
-
2.0766)
52.479
-
52.492
(2.0661
-
2.0666)
52.225
-
52.238
(2.0561
-
2.0566)
0.178 (0.007)
0.05 (0.002)
0.140
- 0.390 (0.005 - 0.015)
0.4 (0.016)
mm(in)
0.10 (0.004) Positions 1 + 2
0.25 (0.010) Positions 3 + 4
88.925 -
88.950
(3.501
- 3.502)
0.20 (0.008)
0.659
- 0.790 (0.026 - 0.031)