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The cams of camshaft driving fuel pump can be adjusted to advance or delay fuel injection to engine cylinder. The cams driving push rods for inlet and exhaust valves can also be adjusted.
In doing all these adjustments, care must be taken to consider positions of piston relative to process to be adjusted.
The flywheel at end of crankshaft is usually marked as a reference to show piston at Top Dead Center. Each piston will have its marking on flywheel. If engine has 6 cylinders, then 6 markings for Top Dead Center will be marked.
From markings on flywheel a person can refer to it for adjustments on fuel pump cams, and cylinder valve cams.
Some diesel engines do not have inlet and exhaust valves. Perhaps we will look at 2-stroke and 4-stroke diesel engine next...
Well folks, start your engines.
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