mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 I'm I reading this wrong ??? last statement was a REAR MOUNT PTO. thought whole purpose of rear mount was to eliminate the trans gear position? a 6 speed dump could operate spreading etc in a gear suited for operation. side mount needed a gear selection == main in gear for pto speed and aux in neutral . original post from yrs back was for a question of gear position. last one was rear mount . Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536440 Share on other sites More sharing options...
Joey Mack Posted August 7, 2023 Share Posted August 7, 2023 The trucks I drove had X-107's.. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536442 Share on other sites More sharing options...
Joey Mack Posted August 7, 2023 Share Posted August 7, 2023 Mech I think you were able to spread dump as well as stationary. It was all in how you picked the gears and range. Or neutral if needed.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536443 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 1 minute ago, mechohaulic said: I'm I reading this wrong ??? last statement was a REAR MOUNT PTO. thought whole purpose of rear mount was to eliminate the trans gear position? a 6 speed dump could operate spreading etc in a gear suited for operation. side mount needed a gear selection == main in gear for pto speed and aux in neutral . original post from yrs back was for a question of gear position. last one was rear mount . Good point. 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/3/#findComment-536444 Share on other sites More sharing options...
Full Floater Posted August 7, 2023 Share Posted August 7, 2023 Very interesting guys. Ya the one I have is a mechanical shift PTO. I have not engaged the PTO on that truck yet as it's just getting back together....but I will play with it both ways, main in N and aux in N. Im always a less confident with that aux box being in N position as they seem/feel less assuring as there isn't much wiggle room on the stick....so I always release the clutch real slow JUST IN CASE it's not actually in N 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536447 Share on other sites More sharing options...
mowerman Posted August 7, 2023 Share Posted August 7, 2023 I am just sitting here thinking wait a minute if the main box is not in gear, the auxiliary gears are not going to turn at all. Ha ha as I mentioned, I haven’t use my PTO and over 25 years. My DM used to be a dump truck took the body off years ago. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536449 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 27 minutes ago, Full Floater said: Very interesting guys. Ya the one I have is a mechanical shift PTO. I have not engaged the PTO on that truck yet as it's just getting back together....but I will play with it both ways, main in N and aux in N. Im always a less confident with that aux box being in N position as they seem/feel less assuring as there isn't much wiggle room on the stick....so I always release the clutch real slow JUST IN CASE it's not actually in N I'm sure you'll figure it out as soon as you engage it. Just let us know what all you learn! 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/3/#findComment-536450 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 Just now, mowerman said: I am just sitting here thinking wait a minute if the main box is not in gear, the auxiliary gears are not going to turn at all. Ha ha as I mentioned, I haven’t use my PTO and over 25 years. My DM used to be a dump truck took the body off years ago. That's why I am so interested in what TJC said! I'd really like to know how that setup he mentioned worked. 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/3/#findComment-536451 Share on other sites More sharing options...
mowerman Posted August 7, 2023 Share Posted August 7, 2023 Yes, since you’ve got 12 opinions, interesting to see which one works ha ha Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536452 Share on other sites More sharing options...
Joey Mack Posted August 7, 2023 Share Posted August 7, 2023 Bob. All of the countershafts are turning at the same time, only when you select a gear and a range does the output shaft turn.. Happy Monday Bob... Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536453 Share on other sites More sharing options...
mowerman Posted August 7, 2023 Share Posted August 7, 2023 1 minute ago, doubleclutchinweasel said: That's why I am so interested in what TJC said! I'd really like to know how that setup he mentioned worked. Yes, mine had to be in gear main box auxiliary in neutral then there was a third lever for the PTO operation Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536454 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 This is what we had... If you wanted to sit still and raise the bed, put the compound in neutral and the main in gear. If you wanted to move wile raising it, put the compound in gear and pick the main gear that suited the situation. 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/3/#findComment-536456 Share on other sites More sharing options...
tjc transport Posted August 7, 2023 Share Posted August 7, 2023 Same trans I had in the r and dm. But each worked different 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/3/#findComment-536460 Share on other sites More sharing options...
mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 2 hours ago, doubleclutchinweasel said: This is what we had... If you wanted to sit still and raise the bed, put the compound in neutral and the main in gear. If you wanted to move wile raising it, put the compound in gear and pick the main gear that suited the situation. so are we talking about a SIDE mount or REAR mount PTO ?? problem with the side mount on 6 speed was to be in a suitable gear for body raise (3 or 4 ) , couldn't take off and move . 1st gear take off was tooo slow for body up. been there done that. try and pull a asphalt spreader = I know pulling the spreader was the dinosaur days (my time slot ). todays world spreaders push the truck. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536462 Share on other sites More sharing options...
mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 1 hour ago, tjc transport said: Same trans I had in the r and dm. But each worked different one may have been side mount PTO vs rear mount. same transmission different PTO operation. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536463 Share on other sites More sharing options...
mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 2 hours ago, mowerman said: Yes, mine had to be in gear main box auxiliary in neutral then there was a third lever for the PTO operation must have been manual engage PTO instead of air operated. would account for third lever. I built a system for customer that had 4 lever system. pain in ass job. ford single axle dump with a flink chip spreader for oiling roads. trans had two PTO's plus up/down body lever also on/off flink spreader. challenge to find pto that was left side mount and ran proper rotation. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536464 Share on other sites More sharing options...
mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 4 hours ago, doubleclutchinweasel said: 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! I'll go with trans was rear mount pto ' constant speed . POSSIBLY aux was left in gear force of habit ; easier to move truck when only one stick had to be moved? same as a duplex/ tri/ or quad box. to have a neutral position only one stick needed to be moved ???? Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536465 Share on other sites More sharing options...
Joey Mack Posted August 7, 2023 Share Posted August 7, 2023 Ok.. rear mount uses the bottom counter shaft. I believe side mount does too. Therefore the same countershaft is turning, but PTO position is different Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536469 Share on other sites More sharing options...
doubleclutchinweasel Posted August 7, 2023 Share Posted August 7, 2023 So, if a PTO is driven off a main box countershaft, it would be live any time the clutch was out. Speed would be constant. If it’s driven off a shaft in the compound, the main box gear selection would determine the speed, and would have to be in gear to rotate the compound input shaft. So, I guess there would be several ways to set that up. Very interesting stuff. Great discussion. 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/3/#findComment-536519 Share on other sites More sharing options...
Joey Mack Posted August 7, 2023 Share Posted August 7, 2023 PTO's are always turning when the truck is running.. When You shift the PTO into gear is when it goes to work.. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536522 Share on other sites More sharing options...
mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 4 hours ago, Joey Mack said: Ok.. rear mount uses the bottom counter shaft. I believe side mount does too. Therefore the same countershaft is turning, but PTO position is different for discussion ONLY 😇; not to object ' memory serves correctly the tri-countershaft transmissions use TOP right counter shaft ??? looking at the trans a side mount bolts higher up and is angled due to trans shape ??? to mount a LEFT side PTO ;which uses the lower countershaft;; a large adapter plate bolts on trans to which has the smaller standard pto bolt pattern. above statement validated cause I just looked at my 1/25th scale mack 6 speed !! LOL Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536526 Share on other sites More sharing options...
MACKS Posted August 7, 2023 Share Posted August 7, 2023 5 hours ago, mechohaulic said: so are we talking about a SIDE mount or REAR mount PTO ?? problem with the side mount on 6 speed was to be in a suitable gear for body raise (3 or 4 ) , couldn't take off and move . 1st gear take off was tooo slow for body up. been there done that. try and pull a asphalt spreader = I know pulling the spreader was the dinosaur days (my time slot ). todays world spreaders push the truck. And there slowly doing away with pushing the trucks,they dump into a transfer machine that conveys the asphalt to the spreader,nothing touches the spreader and it never has to stop in-between loads,end result super smooth roads.. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536527 Share on other sites More sharing options...
mechohaulic Posted August 7, 2023 Share Posted August 7, 2023 the rear mount PTO is constant turn due to power shaft runs off live countershaft. the side mounts have a PTO gear installed on the countershaft which is controlled by main in gear 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536528 Share on other sites More sharing options...
mechohaulic Posted August 8, 2023 Share Posted August 8, 2023 1 minute ago, MACKS said: And there slowly doing away with pushing the trucks,they dump into a transfer machine that conveys the asphalt to the spreader,nothing touches the spreader and it never has to stop in-between loads,end result super smooth roads.. modern technology . in the day a spreader box couldn't hold a full load of asphalt either. looking at shape of CT roads, they don't use them here. NO SMOOTH ROADS HERE. Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536529 Share on other sites More sharing options...
MACKS Posted August 8, 2023 Share Posted August 8, 2023 9 hours ago, mechohaulic said: modern technology . in the day a spreader box couldn't hold a full load of asphalt either. looking at shape of CT roads, they don't use them here. NO SMOOTH ROADS HERE. Same here in Ny in fact there still bumpy after they re surface them..lol Quote Link to comment https://www.bigmacktrucks.com/topic/32412-air-shift-pto/page/3/#findComment-536553 Share on other sites More sharing options...
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