Mack man 1973

Thanks guys for the help !

Looking for a used or rebuildable power steering pump and res for endt 865 or 866

I just bought four brand new head gaskets for my 866 this week Mack's Chicago warehouse has them I ordered them from my local mack dealer. Most people are just to lazy to do any digging or pull out an old parts book instead of a computer to look up the part number I can give you the oem part numbers if you want

What year is it? Looks great I'm glad to see there are other guys with the same problem I have you just have to save the old gals and give them a great retirement .

Awesome truck! Rs is such a cool truck im so glad it will find a new home and was saved from scrapers . I saved my rs from scrapers they were getting ready to cut it n half with a torch and ship it to Mexico. I told them whoo she is coming home with me

On my 73 rs it only has a primary air system with no secondary. Does anyone know what year they started using the secondary air system?

That is a rawhide ch set forward axle

The 866 in my truck has made it 41 years of service . The guy I got it from said it was a good truck for many years . So they were not all junk

The trans in mine is kinda odd it has a fuller rto 12513 13 speed it was factory that is what the build sheet shows . I haven't seen to many v8 with a fuller behind them I've always seen mack trans .

Thanks, I wondered what made the horsepower differance if it was just the pump & turbo or displacement differance. These engines were before my time and is hard to find folks that even know about them anymore thanks again

Sorry I see about the 864 parts only being interchangeable with 864 but I didn't see but didn't see an explanation on the endt 865 and endt 866 parts interchanging

So my question is are 865&866 parts interchangeable ?

Can any of you guys help me my 866 is missing the power steering pump and resovior I need the mack part number on the pump so I can get an aftermarket pump. Any help would be super !