mrsmackpaul

If I understand this correctly you want a double over drive box on 3.79 or 3.98 and you want to pull 30 - 35 tons Unless its down hill and the load is very flat, as in sheet steel I doubt it would be very practical Or maybe you have 700 hp and 3000 pounds of torque Working gearing out on paper is a lot different than using it everyday I feel I would get sick of changing gears pretty quick and would much prefer to have the revs up a bit and just keep on poking along for a extra 1/4 of a hour each day Cummins used to have really good formulas for working this out and it took into account the height, the like terrain and the speed you wanted to travel at Im sure there must be some program or formula still out there to work this out Paul

I have this to be the same in my experience as well Paul

I was working at one of the major power stations in Victoria Australia when a signal fuse to Melbourne a 100 mile away was pulled in the switch yard The snow ball effect from one tiny fuse was instant and irreversible The emergency power batteries were out of action for maintenance at the time This caused a unbelievable chain of events Coal fired power stations need lots and lots of water to get going and to shut down They also need lots of oil pumped to the turbine bearings No power at all and the second biggest power station in the state dead, complete black out, all steam released nothing at all and no hope of getting it back on line within 12 hours The reason I mention this is, from one tiny thing wrong or missed this could and does happen and may well of been whats happened here Like watching those air crash investigation shows, every time its a whole series of small things at a certain time that cause things to go horribly wrong I believe its called the Swiss cheese effect You can have plenty of holes in a block of cheese just as long as they dont all line up at once Paul

Oh, well, um, yeah Im lost for words Best find a family doctor by the sounds of things Paul

I wonder the same thing, I just cant understand how it got this out of hand,surely the area were the fire is could of been sealed off with water tight doors shut and then that area flooded To my untrained brain even if it was oil floating on water and it prevented flooding the use of foam or powder of some type could of been used to fill the compartment or compartments Gunna be one hell of a bill for this mess Paul

Gotta agree with Hayseed, and as ,uch as it pains me to say it they rode better and were much more comfortable to drive than a R model And with big Cummins motors 350-400 they were just as good as any E6 Mack motor They also had those high torque Cummins with I think eith a Eaton or Spicer 6 speed to compete with a Maxidyne, I dont think they sold many though But for many years the S line and it's unidentical twin the T line were everywhere in Australia Paul

Thats amazing how far its spread and still no stopping it, its in port so all facilities that you could possibly want or need I would of thought would be available to you Paul

And the Tip turbine or Coolpower as they were called in Australia doesnt make it a Maxidyne, its the rack on the injector pump and the way it provides a flat torque curve that then enables the motor to lug from 2100 to around 1150 RPM without loosing power. I also believe Maxidynes had different stronger blocks with extra webbing cast into them and no doubt hundreds of other small differences but it was the same basic motor This meant you needed only 5 gears to run semi trailers interstate up and down the biggest mountains and pull high heavy loads into head winds all day with out changing gears very much at all Looking at that last photo I would say that series intercooling became available in Australia in in 1983 so maybe 1982 in the states Plenty of information on how the Maxidyne works and the principal behind them Paul l

That motor I feel is a fairly early Coolpower as it hasnt got series intercooling, not sure when it changed but early 80's at a guess The ones of those I have had anything to do with have engine number on the left rear bellow the exhaust manifold Oil reservoir looks like one from a Mack so Im guessing it got a whole lot of goodies and things done when the newer motor went in as the power steering pump is on the back of the compressor so it was no doubt a good time to change the front axle Paul

Fascinating stuff, I'm learning new things every day Paul

And I will explain my comment I cant see how this has any bearing on Coronavirus news or Coronavirus at all It's just people have a barney about who's more right about a subject that isnt even related Coronavirus at all Now Im going off on a tangent and you can can me all you like As a teenager growing up I like a lot of teenagers struggled to get along with my parents When I was in my early twenties my brother gave me some advice that I still use to this day "you dont have to be right, you dont have to have a argument about every little thing, you can yell and abuse Mum and Dad on the way home in your ute. That way every visit is a good visit" I lost my farther nearly 2 months ago and as we were driving Mum back to her place from the funeral home I reminded my brother of his advice I also thanked him because it meant that the rest of my life with my parents was argument free, it meant my son grew up knowing and loving his grand parents for whom and what they are and not any prejudices that I might have This doesn't mean I just rolled over and was treated like crap, it just meant that my life has been a whole lot richer because of some simple advice I followed and choosing my actions and responses a lot better Maybe there's a lesson in there for some people, maybe not and Im gunna cop a mouthful Paul

What the fudge??? Americans cant speak that much of a different version of the English language than we do in Australia It's not even making sense anymore 🤔 Paul

To keep you informed so people cant go "I cant find a exact figure on how many people have died from COVID 19" at a guess Paul

Thats what the title is on the Australian truck forum Plenty of AC Macks, FWD's and a Holt crawler or two and lots of other jiggers I have no idea of, maybe Sterling or Federal but no idea at all Paul

Put a slight amount of air pressure on the tank (10-20psi) and then look to see if any fuel is leaking out of the system I use a bit of old inner tube and a hose clamp to hold it on the filler neck of the tank Then just a normal airline fitting with a couple of big flat washers thru the inner tube and see if you can regulate the air pressure Crawl under, around on top etc and if a leak is there you'll spot it right away Paul

Definitely a coolpower job, 34's and 38's refer to the back end as in how many thousand pounds they can carry Need to sort something out for the air going into the tip turbine(needs clean filtered air into that big open hose) and she's ready to roll Paul

This to me would clearly have to show that people in the US are doing something wrong with their response to Covid 19 Whether thats people not taking it seriously or there isnt any medical help I dont know, I suspect it's the first one though reading thru this forum and some responses I have read This forum I feel would be a good representation of the citizens of the US Just as a truck forum in Australia would be a good representation of the citizens of Australia Maybe there's some food for thought in my reply, it isn't pointing fingers but just a outsider looking in and I hope it's taken that way Paul

When you hook the batteries up does the amp gauge show whether its charging or discharging If it shows its charging and the motor isnt running it would mean the polarity is back to front and if you have it hooked up for negitve ground its postive ground Paul

Yep as said above, nice old jigger You'll find once your used to the quad box it will be pretty easy and you will only use half the gears Even if you have a full load on you wont use all the gears as some are almost the same and after a while you will stop using the clutch once your rolling and the oil is warm Have fun and welcome Paul

Yes but I guess when you dont know the history its different and to be considered If it had for example a 300 Maxidyne and had pulled a lot of heavy loads in the past it could be a different story None of these things are deal breakers to me but rather just things to consider thats all Paul

A Maxitorque from the rear A Duplex from the rear

I try and stay realistic in my head when buying treasures I look at things that hopefully look crap and I almost always buy things that most others would pass on Everything will wear out and I prefer to rebuild it myself as I then know what short cuts I have taken It is a truck and a old truck and I would be more concerned with buying it if it all looked Micky Mouse as I would have no idea what secrets its hiding If it is a Maxidyne and Duplex you have a box that isnt really strong enough for the torque that motor will make As I said before, just a quick glance underneath will show if its a tripple counter shaft transmission or not Three caps laid out in a tri angle pattern and a triangle shaped box

These figures are quite staggering to me and hard to imagine Thats like every man woman and child in some of our bigger provincial cities gone Absolutely staggering, we think we have problems in Australia, I'm just glad I live here Paul

Oh yes, very very cool I would love one Paul

Is it possible to have a Thermodyne with a 6 speed Yeah of course it is Is it drivable like that ? For sure amd especially considering it's only a small truck it should be more than fine When and if you go for another look Just gran some photos of the engine and any plates on the engine Get undernearh and take a quick picture of the transmission With this basic information we on here should be able to tell you pretty much what you have As in duplex or maxi torque Grab a picture of the plate on the injector pump as well if you can Plenty of help on the forum will be forth coming Paul