Aux compressor

[Jriddle]

My governor will stick everynow and then. Thanks I will give that a try.

John

[Lin]

Duh, thanks Craig for pointing out the obvious that I completely overlooked.

[Jriddle]

I took off governor and cleaned it. I went to get new o-rings and found Napa sells new one for $12.50. It does not say Bendix all over it but works well. I didn't get a good time to fill from zero but did time 90 psi to 125 psi at idle 8 minutes and at fast idle  3 minutes. The part Number on new governor is H284358.

Cody
I told you no Stir Stir Stir LOL

John

[bevans6]

Just for reference, and you probably know this already, the normal test for compressor recovery is from 85 psi to 100 psi in no more than 45 seconds, and usually closer to 20 seconds.  That's with the engine at high idle, or 1000 rpm, depending on if you have high idle.  I found some  tests that called for max governed RPN, but I don't think I'm going to stand on the throttle pedal for 20 seconds with a stop watch in my hand watching a pressure gauge...   

Brian

[Jriddle]

Just for reference, and you probably know this already, the normal test for compressor recovery is from 85 psi to 100 psi in no more than 45 seconds, and usually closer to 20 seconds.  That's with the engine at high idle, or 1000 rpm, depending on if you have high idle.  I found some  tests that called for max governed RPN, but I don't think I'm going to stand on the throttle pedal for 20 seconds with a stop watch in my hand watching a pressure gauge...    

Brian

Alright Brian you p&**%# me off with your test I had to get grease all over me (LOL). I went out and on fast idle it took over a minute to go from 85 psi to 100 psi. Now I had to dig deeper and found the unloader valves sticking. I removed them and cleaned them up now I still am testing them to see if they will stick again. But can go from 85 psi to 100 psi in about 28 seconds on fast idle.

Thanks
John

[gumpy]

So, for us dummies, did you happen to take any photos of the unloader valves and how you cleaned them?

[Jriddle]

No But still have intake off and can get some.

John

[bevans6]

Weel - If you think of unloader valve, and your own personal unloader valve, and pictures - do you really think that is a good idea?

28 seconds is right up there in the 'job done, lets watch this and see' category.  It passes the test, it's very close to optimum, but it should not change much from day to day, it should remain pretty consistent.  It's if it starts to change that you start to wonder.

Also, it's important to not have any governor delay time in there.  You need to have the engine running at high idle, you need to make sure that nothing is calling for air, like the door cylinder closing, or the suspension airing up.  Then you fan the brakes down to 80 psi, wait for the governor to cycle, and then measure the time from 85 psi to 100 psi.  You are measuring JUST the compressor recovery that way.

Good job, though, very impressive!

Brian

[Jriddle]

I removed the intake and the unloader valves are there. Then removed the spring. The top picture shows valves unloaded.

[Jriddle]

After removing spring I removed the bar that bridges across to the valves. I then found that I had to load the compressor by fanning the brakes to get the valves out.

[Jriddle]

View with valves out and parts on bench. Now I can put it back together

John