I've been working on my 72 220D injection pump and have freed up the plungers except for the farthest forward plunger. It moves up and down in the barrel but not as deep as the other ones. Questions,

-Does the outer barrel move along with the plunger? See below.
-Can the outer barrel be removed from the pump from above? Does it just drop into the pump?
-I have rotated the pump via rotating the engine and the plungers move up and down. The outer barrels move up and down slightly.
-Is there something that could of dislodged inside the pump?

The forward barrel sits lower in its hole than the other three. Maybe 1/16 inch lower.

Thanks, Sam

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