Actually if the Fuel Injection pump Timing Locking Tool (part number 601-589-05-21-00) is installed properly you can BY HAND crank the Engine Engine Slowly until it locks.

When you pull the Fuel Injection Pump out leave the Timing/Locking Tool in place and when you put the Fuel Injection pump back in (with the new O-ring on the front) the IP will go back into the same spot; assuming you did not rotate the Engine after pulling the IP out.

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84 300D, 82 Volvo 244Gl Diesel