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Entablature: Cylinder Block for Scavenge Air and Cooling Water Spaces

The entablature, also known as the cylinder block, is a cast iron housing that incorporates the scavenge air space and the cooling water space. It houses the cylinder liner and can be cast as individual cylinders or as multi-cylinder units. Fitted bolts are used to align and locate the entablature, A-frame, and bedplate, while tie rods or bolts resist the firing forces. The entablature also includes liners, a diaphragm plate, and a stuffing box.

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Entablature: Cylinder Block for Scavenge Air and Cooling Water Spaces

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  1. Entablature Entablature is the name given to the cylinder block, which incorporates the scavenge air space and the cooling water space. It forms the housing to take the cylinder liner and is made of cast iron.

  2. The casting is either for individual cylinders which after machining on the mating surfaces are bolted together to form the cylinder beam, or they may be cast as a multi-cylinder units, which are then bolted together. The underside of the cylinder beam is machined and is then aligned to the A-frame and fastened in position using fitted bolts. It is important to remember that the fitted bolts used to bolt the entablature, A-frame and bedplate together are for alignment and location purpose only. They are not designed to resist the firing forces, which will tend to separate the three components. This is the job of tie rods or bolts.

  3. Liners inside the entablature. Also note the diaphragm plate and stuffing box.

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