Vacuum Pump Seal Replacement

So, if your boss comes in one day, and asks "who wants to learn how to fix a vacuum pump?" say no. It's a trap. Before you know it, you'll be neck-deep in fetid, black pump oil as pump after pump after pump breaks down.

Here's how it might go:

After a while, you'll find that your vacuum line is starting to lose some of its original pull.

First, you should regrease everything.

Then, you should change your pump oil.

Or perhaps your pump is leaking oil.

Now you'll have to change some of the seals. Bummer!

It took me a while to find any sort of instructions about seal replacement, so I'm going to pass that onto you, the fine denizens of the internet. I hope this helps someone.

Step 1 The Precision Pump

These instructions are for precision pumps - I know that they're the same for the D25, D75, and D150. Your mileage may vary.

Every time any maintenance is performed on one of these pumps, there's a seal around the shaft that needs to be replaced. The most common cause of leaking oil is this seal. If it isn't replaced when the pump is fixed, you'll end up with a steadily growing puddle of oil, and a pump that pulls a poor vacuum and is prone to overheating.

Comments

[Goodhart]

Nicely done, thank you !