If you have pulled the timer and left the chain in, but didn't mark the timer, you are probably going to have to reset the injection pump.

If nothing moved, figure out where the key is and just install the timer in that position. Then check IP timing.

If something has moved, or you are not sure, you need to verify cam/crank timing using the above pics after re-installing the timer, then check IP timing -- if way off, you will need to set engine to 24 or 26 degrees BTDC, then pull pump and set the start of injection on the IP by aligning the mark on the crank shaft with the mark on the flange (next to the screw in the upper left), then re-install pump and set timing.

Best to mark the chain and timer first, then transfer mark to new timer.....

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!