Air compressor stopped suddenly

[Oonrahnjay]

I already had the compressor installed

      Was the input shaft on the compressor turning OK?  (before you re-installed it, of course!)

[Sam 4106]

Hi Bruce,

Yes the compressor was turning freely, Curt also checked it. I also checked the rods for looseness when I had the crankcase cover off to replace the leaking gasket, they are tight. When I cleaned the compressor I found a rebuild tag. I have no idea what the average life of a compressor is, but I suspect the PO put on a rebuilt one when he put the new engine in about 99,000 miles ago. My air system now has few leaks so the compressor goes about 20 minutes before the pressure drops to 90 PSI and has to work again. Oftener in traffic with a lot of braking.

Thanks, Sam

[Oonrahnjay]

Hi Bruce,

Yes the compressor was turning freely, Curt also checked it. I also checked the rods for looseness when I had the crankcase cover off   

    Good news - hope all is well from here out!   BH   NC    USA

[Low Class]

"I have no idea what the average life of a compressor "

Neither do I.  A cousin bought an old road tractor with well over a million miles.  He didn't know when the compressor was last replaced, but he drove it another 500k.  Said compressor was getting a little weak when he sold the truck.

[luvrbus]

Compressor life all depends on how one is serviced,intake and duty cycles very seldom do people service one Bendix says service the unloader valves at 250,000 miles most just buy a rebuilt compressor when it quits

I under stand not checking the the drive coupling it's a hassle on most buses except the GM's  same thing with a gear driven alternator those are never checked till it's to late