> clay monroe wrote: > SL has a wonky speedo. It registers about 10mph or 9% low. I > am not sure what is up with it, since I have yet to remove it > from the cluster.
If it's 10 mph slow, reposition the pointer on the shaft. However, if it's 9% slow, put on bigger tires, it's not the speedometers fault. > I did yank the offending washer pump. > Pretty simple thing. Motor, spins > plastic wheel attached to brass post and toothed gear. Gear > spins another gear (stabilizer) and somehow water is sucked in > one side and out the other to the windscreen. Pressure pump. The second gear is not a stabilizer, it is the pump. The gears have to be pretty tight to the housing. It works because where the gears mesh the fluid is displaced. The fluid is picked up by the gear tooth and forced forward because the gear is sealed to the walls. The fluid does not then return because where there is a meshed gear in the space where the fluid used to be. Here is an animation. It doesn't really show how the fluid is moving... http://www.pumpschool.com/principles/eg_ani.htm This one is flash and shows it a bit better. http://www.techberth.com/how-gear-pump-works-animation/ > Get it all nice and bright/smooth and used some light > machine oil to seat all the moving parts and put her back > together. I have a washer pump now. Well done! -- Philip _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
