I have a spare IP from a 1984 300D. This pump and engine sat for many years on a pallet. It has 130,000 miles on it.

What is the procedure to clean the gunk out of the pump?

Is is possible to clean without disassembly? Could it be cleaned by putting a feed hose on the input side into a container of some solvent, and then run the pump with an electric drill to pump the solvent all through the pump?

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1st MBz: 1982 300SD
2nd MBz: 1987 300SDL
3rd MBz: 1995 S420
4th MBz: 1987 190DT
5th MBz: 1984 300SD w/1983 300DT engine
6th MBz: 1999 C230k I'm 3rd owner, got it w/57,235 miles.
and manages Mom's 2007 R320 CDI

if the injector lines are still attached to the pump, and the injectors, I'd just connect the fuel lines to a container of clean diesel, and pump the primer until all the air bubbles stop, then loosen the injector lines, and crank the motor over until clear fuel pumps out of each nut. tighten them up, and enjoy the motor.
I'd NOT pull the pump and run it on a drill...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

It is not on an engine. The IP is sitting in a box.

__________________
.
1st MBz: 1982 300SD
2nd MBz: 1987 300SDL
3rd MBz: 1995 S420
4th MBz: 1987 190DT
5th MBz: 1984 300SD w/1983 300DT engine
6th MBz: 1999 C230k I'm 3rd owner, got it w/57,235 miles.
and manages Mom's 2007 R320 CDI

If it was sealed, there shouldn't be any gunk inside. Diesel can sit for years without degrading. The worst problem is biologic slime can grow if there is water, but that shouldn't affect the pump. Just turn it over with the engine first, without the injector tubes to flush the oil fuel out (cover holes to manage the squirts). If the "crankcase" of the pump was exposed, you might need to drain and clean the oil inside. You might remove the vacuum "stop valve" on the aft end, pour the old oil out. If looks gunky, pour diesel fuel inside, slosh around, and drain. The pump gets oil from the engine, probably from splash, flow-over from the front hole (haven't fooled with that).