[HO455]

Swapping the physical compressor was straight forward. Drop the old one. ( Photo 1) Drill new holes in the mount and bolt back in place. Once it was in place the old 1/4" fittings at the tank had to be removed and replaced with 3/8" fittings. Bigger is better, right?
Just before this little project kicked off I discovered two other issues.
One was the external line hook up would leak past the shut off valve and past the female connection. So a new valve was installed. (Photo 2)
Two was there was no over pressurization protection. I also wanted to install a water trap in the supply line to the controls. Ideally I would have liked to put the water trap a little farther away from the tank but the water trap I ordered (Link below) has no provision for a mounting bracket. So it had to hang off the piping from the tank and the new 150 psi pop off valve shared the tee. (Photo 3).
The last photo shows the new compressor. (Viair 485C) I am quite happy with it although at initial start up I thought it was going to be much noisier than the old one. It actually seems no louder than the old one. I do notice the lights flicker when it starts up. I can actually watch the guage and see the needle move.

https://www.jegs.com/i/Air-Lift/022/21012/10002/-1