Make marks on the chain in reference to camshaft sprocket and crank sprocket when tearing down the engine at 15 ATDC. Find a port on the injection pump driver's side that allows you screw in a bolt that will fix the pump's camshaft in place.

The adjusting bolt for the pump will also serve as a reference when re-installing.

However, if you are tearing down an engine, you will need access to a service manual and will / should replace parts that affect timing. You will want to time the injection pump after the rebuild.

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