Blue ox brake

chazwood · January 10, 2013, 01:00:09 PM

Anyone have a blue ox exhaust brake hooked to their bus? I have one that's not hooked up and MCI tech. is pretty clueless as to how it came on the bus. I would like to get it back to original But mine is not hooked up to an air supply. Don't know what line they used.

busguy01 · January 10, 2013, 04:02:05 PM

Blue Ox never made an exhaust brake. Lots of other brakes but no exhaust. A picture would help!
JimH
Past President - Blue Ox

opus · January 10, 2013, 07:00:57 PM

Hmmmm.....

http://www.brakesystemsinc.com/blueox.html

TomC · January 10, 2013, 10:22:50 PM

The operation is much like a Jake Brake. Have a master on/off switch on the dash with a micro switch on the gas pedal to have it activated only on no gas position, and another micro switch that deactivates the exhaust brake when you push on the clutch. Simple-just need to have an air supply and a normally closed 12v (or 24v if that's what you have) air solenoid with exhaust port to operate the exhaust brake. Good Luck, TomC

busguy01 · January 11, 2013, 05:01:58 AM

Not the same company that makes the blue ox tow bars and brake systems. The parent company of Blue Ox Tow products is Automatic Equipment MFG dba Blue Ox. 2 different companies. The Blue Ox of tow bar fame is the one I spoke of. Sorry for the misunderstanding.
JimH

chazwood · January 11, 2013, 08:28:07 AM

Yes Tom,
I was hoping to find out exactly where the air came from.

P.s. Thank you bus guy:)

TomC · January 11, 2013, 12:20:41 PM

Sorry, can't help you there. There are very few that use exhaust brakes-popular in Europe though. Good Luck, TomC

Dave5Cs · January 12, 2013, 12:10:01 PM

Says on the Blue -Ox site they are for 4 stoke only? just noticed that.
Does that matter on a 2 stroke or can it even be used?

Dave5Cs

TomC · January 12, 2013, 11:16:37 PM

Never, NEVER use an exhaust brake with a 2 stroke. An exhaust brake works by plugging up the exhaust pipe with a butterfly valve with bypass to let some exhaust through. This works well with a 4 stroke in that it just makes it harder for the piston to push out the exhaust-hence the braking effect. On a 2 stroke-yes you would also get the braking effect, but with the over lapping of the intake and exhaust cycles, and the fact that the piston doesn't actually push the exhaust out of the cylinder, the blower is what pushes both the fresh air in and helps the exhaust also leave the combustion chamber. Hence, with a 2 stroke, all the back pressure from the exhaust brake would be absorbed or taken by the blower-most likely blowing it right off the engine. Good Luck, TomC