Yamaha EF4500iSE - Inverter Generator, Theory & Diagnostics Manual

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3-14
Yamaha Generator Theory & Diagnostics Guide
Unit Standard Limit
Piston: mm (in)
Piston clearance 0.015 ~ 0.040 (0.0006
∼
0.0016) 0.1 (0.004)
Piston skirt “ D ” 66.0 (2.598) 65.9 (2.594)
Measuring point “ H ” 10 mm (0.4)
•••
Piston pin hole inside diameter 16.002
∼
16.013 (0.6300
∼
0.6304) 16.020 (0.6307)
Piston pin: mm (in)
Piston pin diameter 15.995
∼
16.000 (0.0.6297
∼
0.6299) 15.950 (0.6280)
Piston ring: mm (in)
Top ring
Type Barrel face
•••
Dimensions “ B
×
T ” 1.5
×
2.7 (0.059
∼
0.106)
•••
End gap 0.2 ~ 0.4 (0.008
∼
0.016) 0.9 (0.0354)
Side clearance 0.04 ~ 0.08 (0.0016 ~ 0.0031) 0.1 (0.0039)
2nd ring
Type Taper
•••
Dimensions “ B
×
T ” 1.5
×
2.7 (0.059
∼
0.106)
•••
End gap 0.2 ~ 0.4 (0.008
∼
0.016) 0.9 (0.0354)
Side clearance 0.02 ~ 0.06 (0.0008 ~ 0.0024) 0.1 (0.0039)
OIl ring
Type Solid
•••
Dimensions “ B
×
T ” 2.5
×
2.7 (0.098
∼
0.106)
•••
End gap 0.2 ~ 0.4 (0.008
∼
0.016) 0.9 (0.0354)
Cylinder: mm (in)
Inside diameter “ D ” 66.00
∼
66.02 (2.5984
∼
2.5990) 66.020 (2.5990)
Taper limit
•••
0.05 (0.002)
Warpage limit
•••
0.05 (0.002)
Crankshaft: mm (in)
Big end side clearance “ A ” 0.2 ~ 0.60 (0.008 ~ 0.024) 0.75 (0.029)
Runout “ B ”
•••
0.04 (0.0016)
Crank pin diameter “ C ” 28.0 (1.102) 27.9 (1.098)
Connecting rod: mm (in)
Small end diameter “ A ” 16.006
∼
16.020 (0.6301
∼
0.6307)
•••
Oil clearance 0.006
∼
0.025 (0.0002
∼
0.0010)
•••
Small end diameter “ B ” 28.000
∼
28.015 (1.1023
∼
1.1029)
•••
Oil clearance 0.015
∼
0.040 (0.0006
∼
0.0016) 0.1 (0.004)
7-3
MAINTENANCE SPECIFICATIONS
SPEC
MAINTENANCE SPECIFICATIONS
ENGINE
T
B
7CF10-07 05.5.6 19:49 Page 3