Unless MB changed things around for 1984, the hyd sys has it's own pump, as is on my '83 TD. Now, my '87 has one of those tandem pumps, but not the '83. Follow the hoses form the hyd. fluid res. and see where they go, you should find a pump that is located on the front of the engine, near the power steering pump.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section