Joe Ditchkus Posted November 28, 2013 Share Posted November 28, 2013 Go to any parts house that sells PTO'S or rebuilds trans or rears. If there is a shop that installs dump or packer bodies they will get it for you.It is a common part that bolts to PTO. No brackets are needed with the correct part. Joe D. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-218859 Share on other sites More sharing options...
pmolitor Posted November 28, 2013 Author Share Posted November 28, 2013 tried that. mack pto is a different animal. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-218897 Share on other sites More sharing options...
MACKTRUCKS4 Posted November 28, 2013 Share Posted November 28, 2013 When I put the 12 spd. in my superliner, I did the same set up. Mack pto, called my local mack dealer and he faxed me all the papers he had on the mack pto with air shift. That was a few years ago and I got everthing from mack. Air cylinder, brackets, hardware, etc. I may still have all the papers somewhere, will look when I get time. Quote Live every day like it's your last, because one of these days, it will be. Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-218932 Share on other sites More sharing options...
MACKPARTS603 Posted November 29, 2013 Share Posted November 29, 2013 MACK IMPACT IS NOT RECOGNIZING THE 414KB420A NUMBER, LOOK ON THE MAIN PTO HOUSING CLOSER TO THE TRANSMISSION FOR A 52KC CASTING NUMBER. BOTH SMALL AND LARGE PTO' S TAKE THE SAME CYLINDER, JUST DIFFERENT BRACKETRY AND LEVER ON PTO SHIFT RAIL Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-219017 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 no air to air accelerator pedal and quick release valve something to do with pto Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502790 Share on other sites More sharing options...
Joey Mack Posted July 11, 2022 Share Posted July 11, 2022 are you posting a question, or responding to an 8 year old post? jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502794 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 asking a question Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502797 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 pto must have some sort of lockout system im not familiar with Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502799 Share on other sites More sharing options...
Joey Mack Posted July 11, 2022 Share Posted July 11, 2022 ok.... Can you give more info on your issue, and Im guessing this is an MR or LE? are there multiple issues? many guys here to help you.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502800 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 put pto on lifted body dumped stone lowered body no air to accel foot pedal and quick release valve 1995 mack dump sn #1m2p286c5sm023080 need to find air source that feeds units Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502804 Share on other sites More sharing options...
Joey Mack Posted July 11, 2022 Share Posted July 11, 2022 follow the air lines back to the tank. if they go to the same fitting, or pressure protection valve, it is probably stuck.. if that is what is there, you can remove the valve and hook the lines direct, just to get it to a shop, or off the job site. what model is the truck.. I think 1M2P2 is an RD.. is this a U.S. truck? jojo Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502805 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 Can you guys help me Im in a bind Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502807 Share on other sites More sharing options...
Joey Mack Posted July 11, 2022 Share Posted July 11, 2022 you are not posting enough info, I am out... sorry... Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502808 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 R model mack . I'm a mechanic from International harvester co. we dont have this system. We had a system on our trucks when the outriggers were down you couldnt put the truck in gear everything was elctrical Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502809 Share on other sites More sharing options...
James McCann Posted July 11, 2022 Share Posted July 11, 2022 ill let you know how i make out ill follow your instuctions and see what happens thanks Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502810 Share on other sites More sharing options...
Joey Mack Posted July 11, 2022 Share Posted July 11, 2022 so the body comes down and now you have lost functions?? any chance an air line or wire was pinched by the body... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-502816 Share on other sites More sharing options...
Full Floater Posted August 7, 2023 Share Posted August 7, 2023 I'm new to the rear mount PTO on a 6 speed. Can I get any operating tips before I try to figure it out for myself? Does the main trans need to be in gear for engagement? Where should the aux box stick be positioned? Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536413 Share on other sites More sharing options...
Joey Mack Posted August 7, 2023 Share Posted August 7, 2023 I believe you put the aux. Box in neutral, then you can select 1st-3rd depending on the PTO speed you need. It's been over 20nyears since I drove a 2 stick R/DM model dump truck. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536417 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 That's what I remember, too, JoJo. Front box had to be in gear. Rear in neutral. Select main gear based on PTO RPM required. But, it has been 42 years for me! 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536422 Share on other sites More sharing options...
tjc transport Posted August 7, 2023 Share Posted August 7, 2023 i have had them both ways. main in gear, aux in neutral. also main in neutral and aux in direct. Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536423 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 Yeah, I may have spoken out of ignorance! I'm thinking back to a particular truck I remember. It had a 2-stick Maxitorque "Extended Range 6-Speed". On that one, if the mainshaft wasn't turning, there was nothing happening in the rear box either. Not sure where the PTO was mounted on it, though. That one required the front box to be in gear to spin the PTO. But, you had a selection of PTO speeds to choose from, which was useful sometimes. But, since the countershafts are powered even when the front box is in neutral, I suppose you could power the PTO off of one of them, albeit at a constant ratio. TJC, you've got me curious. What box did you have where there was power coming off the auxiliary when the main was not turning? That's an interesting setup. I'd like to see how they routed the power through that one. Sure would like to know more about that one! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536427 Share on other sites More sharing options...
tjc transport Posted August 7, 2023 Share Posted August 7, 2023 not sure what trans it was other than a twin stick. driver side was main, passenger side stick was reverse to you and back, low away and up, and direct away and back. the 85 R models was main in gear, aux in neutral. the 79 DM was main in neutral and aux in gear. but now that i think of it, they were not air pto, they were mechanical shift. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536429 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 Thanks! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536433 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 Not sure which trans the OP has, but here is some verbiage from a service manual that talks about air-shifted aux versions... This particular group works like the one I remember using...neutral on the rear box for PTO. But, again, this may not be the right group for the OP. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536437 Share on other sites More sharing options...
mowerman Posted August 7, 2023 Share Posted August 7, 2023 I’m thinking on my 66 it was man box in gear, auxiliary in neutral .. ancient post I’m sure this guy already got it figured out it’s been a long time since I had the dump body on it… Bob Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/2/#findComment-536438 Share on other sites More sharing options...
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