I have a question on the pump. I tried to turn it by hand left and couldn't budge it. I then tried to turn it right no luck either. Any suggestions on how to get it so it will lift up to pump the line? Why is it so tight?

If it is black it is probably the new style and does not need to be rotated, just press.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

It is a clear colored nylon round top. Not for sure how it comes up, didn't want to break it.

It unscrews counter-clockwise from top, then pumps. don't know why it's stuck, but that is how it works

Good thread: Here's my payback! Diesel Primer Pump Replacement

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

I got it loose it was just super tight. I used a screwdriver on one of the bosses & another to kind of tap with and it started moving. Thanks for the help...just didn't figure it would be that much of a case to deal with.