j-d wrote:
"HELP" line products from Dorman has two of those spherical vacuum reservoirs. One has its own built in check valve and has two hose connections. The other works with an external check valve and only one connection. With a little rearranging, you can use either. I like to use the one-connection one with a separate check valve. Last one I did, the Reservoir ended up in an awkward place, so I wanted the check valve out where I could get at it for troubleshooting. We had a failure, and I felt smart when it turned out to be check valve and it was right out there easy to change.
The reservoir on the ‘75 MB300 is located on the inside of the passenger frame rail, under the passenger seat. It’s pretty easy to access. I’m feeling a little dumb, when it comes to understanding the concept of a one nipple reservoir. I know that the reservoir stores vacuum, but in order for it to do so it needs one nipple to draw the vacuum from the engine. How do you get the vacuum back to the part that needs it?
I’m a visual guy, so reading stuff sometimes doesn’t make sense to me. If anybody has a picture of the set up, using one fitting a check valve, that would be great to see.
