I assume the question means you have pulled the sleeve/plunger set out and need to install in the correct position.

Unfortunately, you need to put the pump on a test stand to get it right unless nothing else moved -- rack adjustment will be the same, but you need to put it back exactly where it was. I don't know if this pump uses a "arm" or a gear to rotate the sleeve/plunger -- you may be able to get it back on the right tooth if it's a gear, and it it is an "arm" you only have to get it onto the ball.

Either the plunger or the sleeve (dont' know which in this pump) rotates to control end of delivery position and hence amount of fuel delivered. If the sleeve is in the wrong position, start of injection and end of injection will be wrong, so you incorrect amounts and timing of fuel delivery.

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!