This is a very good pump with signs of reasonably low wear. It is hard to tell for sure but it appears to have been installed on a rebuilt engine with only about 10,000 miles on it. WARNING READ CAREFULLY: If your vacuum pump recently broke apart there may be a reason for it other than just a vacuum pump fatigue failure. When these pumps break up inside there is usually a problem with the drive mechanism inside the diesel engine. You could have a damaged cam or a worn-out bushing inside the timing device shaft. This is what drives the injection pump. When the bushing wears, the timing device with pump actuating cam WILL wobble and that can cause extreme stress on the vacuum pump mechanism. Thoroughly inspect your engine before installing a replacement pump or your replacement WILL ALSO BREAK APART!!! We can not give any warranty or return if there is an internal problem in your engine and this replacement pump breaks on you after installation. We are seeing this problem more often now and have decided to warn all our customers about this problem on the OM616 and OM617 engines.
Product Details
This is a very good used pump. It will come with a new gasket and proper sealant at no extra charge. IT DOES NOT COME WITH AN EXTERNAL CHECK VALVE. You will have to remove it from your old pump and install it on this one (use thread sealant on the threads when installing the external check valve.
This unit fits all 123 and 126 chassis 1981-1985 with the 5 cylinder turbo diesel engines. Also fits 1980 and 1981 300D and 300CD non-turbo as well as 1980 to 1983 240D. NOTE: Before purchasing be sure that your current unit looks just like this one. It is not uncommon that you could have an older-style diesel engine in your Benz. If you are experiencing hard breaking and other vacuum-related problems, it may be time to replace your ailing vacuum pump.
Related Products:
Diesel 616 617 Vacuum Source Troubleshooting and Repair - by Kent Bergsma
Applies to 240D 300D 300CD 300TD 300SD Diesel This guide is written specifically for owners of 123 and 126 diesels from 1977 up to 1984. There are some sections that apply to the 115 and 116 chassis but it is not specific to those models.
Diesel Late 616 and 617 Vacuum Pump External Check Valve -Used
Good Used Vacuum pump check valve. FITS THE FOLLOWING: ALL 123 and 126 chassis 240D, 300D, 300TD, 300CD, and 300SD 1980 to 1985 with later style vacuum pump (only one line coming out of top). You might consider getting a spare while these are still available.
Late Style Vacuum Pump Main Checkvalve ( Check Valve )
FITS THE FOLLOWING: ALL 123 and 126 chassis 240D, 300D, 300TD, 300CD, and 300SD 1980 to 1985 with later style vacuum pump (only one line coming out of top). In 1980, Mercedes changed the design of its diesel vacuum pumps.