I was reading an interesting article in the March issue of the March issue of "Mercedes-Benz Classic" Magazine. The article "Pump Station" is on the current Bosch repair service for the mechanical fuel injection pumps. It states that the Koller & Schwemmer Company in Nuremberg, took over the original manufacturing equipment, the design drawings, technical documents and replacement parts from Bosch for these vintage mechanical injection pumps.
They do offer rebuilding service, but it seems very pricey (2,550 euros for a two plunger pump), compared to the alternatives here in the US. I expect it is a bit more involved than the usual rebuilds.
Some interesting points are made in the article;
"just because it is a screw, it doesn't mean it has to be turned"
"Thousands of mechanical injection systems have been repaired or reconditioned there and, after being preset on special test benches, have left with a lead seal on them. The astonishing thing about it is that most of the supposedly defective pumps were not in need of reconditioning at all - they were merely improperly adjusted."
"An injection pump can easily outlive three engines."
"Moisture is the mortal enemy of high precision mechanics."
"The best advice that can be given to avoid wear caused by long periods of inactivity is: regular operation."
The article is fairly short, but has some nice photos and a lot of good insight and advice.
Joe Alexander
Blacklick, Ohio
