Westerbeke 20B TWO/30B THREE Manual de servicio Pagina 19

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Specified Value/Standard
Repair
Limit
Rocker
Arm
Rocker arm
1.0.
0.472
(12 mm)
Rocker arm
to
shaft clearance
-0.008 (Service limit)
(-0.2 mm)
Cylinder
Block
Camshaft hole dia.
Front
1.654 Ball bearing hole
(42 mm)
NO.2 1.339
(34 mm)
No.3
(30B Three only) 1.299
(33 mm)
Rear 1.299
(33 mm)
Cylinder
Bore
Bore size 2.992
+0.008
(76 mm)
(+0.2
mm)
Oversize finish tolerance
o -
0.001
for
each oversize
(0
-0.03
mm)
Cylindricity Within
0.0004
(0.01
mm)
Gasket fitting/surface distortion Within
0.0020
0.004
(0.05 mm)
(0.1
mm)
Piston
Type
Solid type
Material
Aluminum alloy
0.0.
(skirt end)
2.992
(76 mm)
Clearance
to
cylinder
0.001
(Service limit)
(0.3 mm)
17
Westerbeke
Engines
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