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Step 4Remove the hose from the hose fitting
The exhaust check valve is in the hose attachment fitting; you need to gut it so that air can flow freely into the pump through it.
But first you need to get the hose off, to get at the fitting to modify it.
There is a piece of thin metal crimped around the end of the hose, to clamp it onto the fitting. You need to get that off, so you can remove the hose. Cut the thin metal with tin snips, nippers, a rotary tool, or whatever you have available that can cut thin metal. (You might even be able to tear it apart with a small screwdriver and needle-nosed pliers, with some effort. Pry and bend and tear it apart bit by bit.)
Once you've got the crimp off, work the hose off the fitting. You'll find a "hose barb" there---a hollow cylindrical bit that sticks up into the hose, with a flared part to help it grip the hose from the inside.
But first you need to get the hose off, to get at the fitting to modify it.
There is a piece of thin metal crimped around the end of the hose, to clamp it onto the fitting. You need to get that off, so you can remove the hose. Cut the thin metal with tin snips, nippers, a rotary tool, or whatever you have available that can cut thin metal. (You might even be able to tear it apart with a small screwdriver and needle-nosed pliers, with some effort. Pry and bend and tear it apart bit by bit.)
Once you've got the crimp off, work the hose off the fitting. You'll find a "hose barb" there---a hollow cylindrical bit that sticks up into the hose, with a flared part to help it grip the hose from the inside.
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