Mechanical Air Compressor - Working take Off

[DLCameron2]

Air compressor off of my 6V92 engine. Includes air lines and coolant lines. Asking $150 plus shipping.

DC

 

[rustybucket]

Would you mind educating me a little on this? This air compressor would be used for pneumatic tools correct? Assume you would need to install an air tank on the boat somewhere as well?

Is the compressor always running or is there a way to turn it off/on to reduce it's load on the engine?

 

[jim rosenthal]

Also for the air horns, I think.

 

[johnjen50]

I'm going to remove mine as well. Do you have a source for a cover plate to take its place once its no longer there?

 

[Fanfare]

On my boat this compressor ran the air horns and the windshield wipers. I believe this is the same compressor that runs the air brakes on trucks and buses. Very reliable and nearly bullet proof. While this compressor is turning all the time it only compresses air when it senses pressure below its psi setting. The rest of the time its valves stay open. Probably less parasitic drag than the alternator at most times. I added a tap and air hose to use for inflating bike tires, fenders and stuff, very useful. Unfortunately we could not figure a way to keep this compressor when I replaced my 8-71N with 6-92TA engines because there was no space for the drive.

But I still needed something for my terrific Buell dual air horns which need 100-125 psi. I bought a 12v electric tank and compressor which works OK for an occasional toot such as is needed in the Bahamas. But when we went to Nova Scotia this was unable to keep up with the 30 second blast every two minutes for the foghorn. (Good thing I also added an automatic foghorn timer switch because the last 1,000 miles was almost always socked in.) For this purpose I had to install a Sears 110v air compressor which barely kept up with the necessary air volume. This was mounted on the port engine room overhead--aka the salon deck where it makes a terrific racket. I'm always on the flying bridge in fog so this doesn't bother me much, but it's worth considering.

I had removed my air-operated wipers because they were always rusted shut and the blades sun-roasted and useless, but even so I would have kept my DD air compressor if I could have.

 

[johnjen50]

Jim thanks for your thoughtful comments. You have given me something to think about here. I wasn't going to get rid of it, and don't have the air wipers anymore, but will need to assess the whole horn thing again. Thanks!

 

[bostonhatteras]

I'm going to remove mine as well. Do you have a source for a cover plate to take its place once its no longer there?

There is a guy on EBAY with crazy amounts of old Detroit stuff. C-NAN I think is the store name. He should have it.

 

[bostonhatteras]

http://www.californiaairtools.com/u...-of-ultra-quiet-air-compressors/cat-2010alfc/

This is what I used. The ultra quiet is no idle boast. The company rep said that bigger units go on hatts now. divorced the air compressor and remote located a 6 gallon aluminum tank and used the two gallon on bridge close to horns. Truck air brake nylon lines. powered 100% of the time via inverter. Id never go back to 12v air compressors

 

[kelpy]

There should be the same number of power takeoffs on either engine.

 

[johnjen50]

Thanks Boston. Very helpful. I will look up Cnan. I like the remote tank idea as well.

 

[Fanfare]

I'm going back some 23 years so memory could fail me. I believe the drive location for the air compressor on the back of the 8V-71N was overlapped and covered by the turbocharger on the new 6V-92TAs preventing that spot's use. Mine have a single water-cooled turbo for each engine and each is big. Some of the earlier engines in the 71 series needed two smaller turbos per engine to produce less horsepower. I asked the Detroit Diesel factory and several mechanics if I could somehow keep the old compressor with my 550 hp 6-92s and the answer was universally no.

 

[Scarlett]

Answer to the question about what to do when you remove that compressor, Detroit makes a plate to cover the hole left when removed. I am currently doing the same thing on my 8-71ti part available at Valley Detroit diesel in Calif. John

 

[johnjen50]

You don't happen to have a part number for that do you John? Thanks.