Yamaha EF4500iSE - Inverter Generator, Theory & Diagnostics Manual

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3-6
Yamaha Generator Theory & Diagnostics Guide
Unit Standard Limit
Piston: mm (in)
Piston clearance 0.01 ~ 0.04 (0.0004
∼
0.0016) 0.1 (0.004)
Piston skirt “ D ” 40.95
∼
40.97 (1.612
∼
1.613) 40.94 (1.6118)
Measuring point “ H ” 10 mm (0.4)
•••
Piston pin hole inside diameter 10.000
∼
10.020 (0.3937
∼
0.3945) 10.050 (0.3956)
Piston pin: mm (in)
Piston pin diameter 9.99
∼
10.00 (0.3933
∼
0.3937) 9.95 (0.3917)
Piston ring: mm (in)
Top ring
Type Barrel face
•••
Dimensions “ B
×
T ” 0.8
×
1.6 (0.03
∼
0.06)
•••
End gap 0.1 ~ 0.3 (0.0039
∼
0.0118) 0.6 (0.0236)
Side clearance 0.06 ~ 0.11 (0.002 ~ 0.004) 0.15 (0.006)
2nd ring
Type Taper
•••
Dimensions “ B
×
T ” 0.8
×
1.7 (0.03
∼
0.07)
•••
End gap 0.10 ~ 0.3 (0.0039
∼
0.0118) 0.6 (0.0236)
Side clearance 0.06 ~ 0.11 (0.002 ~ 0.004) 0.15 (0.006)
OIl ring
Type Solid
•••
Dimensions “ B
×
T ” 1.5
×
1.9 (0.059
∼
0.075)
•••
End gap 0.2 ~ 0.7 (0.0078
∼
0.0275) 0.9 (0.0354)
Cylinder: mm (in)
Inside diameter “ D ” 41.000
∼
41.010 (16.14
∼
16.15) 41.10 (16.18)
Taper limit
•••
0.05 (0.002)
Warpage limit
•••
0.05 (0.002)
Crankshaft: mm (in)
Big end side clearance “ A ” 0.2 ~ 0.65 (0.008 ~ 0.026) 0.7 (0.028)
Runout “ B ” 0.03 (0.001)
Crank pin diameter “ C ” 15.970
∼
15.985 (0.629
∼
0.630) 15.940 (0.627)
Connecting rod: mm (in)
Small end diameter “ A ” 10.006
∼
10.020 (0.3944
∼
0.3945) 10.050 (0.396)
Oil clearance 0.015
∼
0.050 (0.0006
∼
0.0020)
•••
Small end diameter “ B ” 16.000
∼
16.015 (0.6299
∼
0.6305) 16.050 (0.632)
Oil clearance 0.015
∼
0.050 (0.0006
∼
0.0020)
•••
7-3
MAINTENANCE SPECIFICATIONS
SPEC
MAINTENANCE SPECIFICATIONS
ENGINE
T
B