Sunday, April 5, 2020

Procedure for cutting off cylinder unit

The following sequence would be carried out for ships which use the MAN B&W slow speed engine:

Stop engine, isolate systems and allow to cool

Ensure a procedure is written that minimises the risk to personnel during the operation.

Discuss the task and written procedure with the engine room personnel to ensure they are familiar with the risks, and the methods to be used to minimise these risks.

Ensure the fuel pump is de-activated by lifting roller and locking.

Lift exhaust valve actuators so exhaust valve remains closed during running. (Note: the air spring supply to be left open)

Dismantle air start supply line, and blank with suitable steel plates, the main and control air pipes

Dismantle bottom end bearing, and turn engine to suspend piston, crosshead and connecting rod from supplied crosshead supports.

Secure big end of connecting rod in crankcase.

Blank off main lube oil inlet to crosshead within the crankcase with a blanking plate.

Isolate the cylinder lubricator for that cylinder by placing all lubricators on no stroke.

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