I think there may be a more fundamental question here. If you don't have the clear hose to the air cleaner, do you have a pump with a diaphragm? I am under the impression that the pumps without the clear hose were not diaphragm pumps but piston pumps. Also, if you don't have the hose to the air cleaner, I don't see how a bad pump can be causing the engine to smoke since I think the bad diaphragm put oil into the combustion chambers via that clear hose to the air cleaner. So, the source of your smoke must be elsewhere (I think) unless someone can explain how oil would get into the combustion chambers some other way as a result of a bad piston pump.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13