What is the first action when removing the camshaft?

When removing the camshaft, the appropriate first action is to pull it straight out of the crankcase. This step is essential because it directly applies to the correct sequence of disassembling the engine components. The camshaft is designed to fit precisely into the crankcase, and pulling it out in a straight manner prevents damage to both the camshaft and surrounding components.

Before this action, it is understood that the engine needs to be appropriately prepared, which includes ensuring that any necessary parts, such as the valve tappets and screws, are properly handled. If the valve tappets have not been removed or inspected beforehand, this could hinder the pulling of the camshaft or even lead to complications; therefore, it's the most logical progression in the process.

By focusing on pulling the camshaft straight out, rather than inspecting or removing other components first, this option aligns with practical mechanical assembly and disassembly procedures in engine repair and maintenance.