67RModel

If you find a tandem truck and want to make it a short single axle I would say its fairly easy. You will need to find a single axle rear end with leaf springs with the proper gear ratio for a gas engine (I think a B42 is a gasser). I think @Mean Greenhas one he is willing to donate to a good home. Like others have said a tandem will most certainly have a camelback suspension and using one the tandem axles isn't really feasible. As far as installing the the new single axle onto the frame I would say its a straight forward process if the rear end you get has the leaf springs and hangers still attached. I shortened my R model from 207" to 165" wheelbase with just basic tools when I was forced to stay home for covid19 lockdown. Took about three days of work to complete but I took my time and was methodical about it. Pretty much all I needed was a 1/2" breaker bar with a 15/16" socket, 15/16" wrench, 1/2" drill, a premium quality Cobalt 5/8" drill bit, a tape measure, sledge hammer, and a lot of muscle. I was able to shorten my existing driveshaft. I think the shop charged me somewhere around $150 to shorten and rebalance my driveshaft. You may need to get a new driveshaft made if the yokes are not the same on between the two different axle setups. Not really a big deal though. Attached are some of the pictures of when I shortened mine. Very doable project. IMG_2218.thumb.JPG.d7a3ddd174da412e29a9220f8a8142c1.jfif IMG_2223.thumb.JPG.a81b9cb40800122b8d6882caa8d4673a.jfif IMG_2224.thumb.JPG.bd76e86dfa69ba31639d6eced30c7869.jfif IMG_2244.thumb.JPG.be4a5464f06fe84c009c64a71c17c5a5.jfif

I suspect if adding more fuel and twin turboing an E6 was any bit advantageous then Mack engineers would have made such an engine 40 years ago. I get you want to experiment but it seems futile as you already know how its going to end. An 89 would be a 4V E6, which is a very desirable engine in my opinion and not worth destroying. To each their own I guess. As for building an E7 with 550 horsepower you are pretty much negating the two hallmarks of the Mack E7: reliability and fuel efficiency. An E7 with over 450 horse is nuts IMO. Depending on how often you are are using 550 hp you will have trouble keeping it cool and quite frankly in one piece.....

Finally got around to fixing my dash lights. They are all wired through the dimmer rheostat. If your dash lights stop working it’s most likely your dimmer unit. Very easy fix. Below is a picture of the Mack (Volvo) part number you will need.

Renault bought a 10% stake in Mack as far back as 1979 and then increased their ownership to 40% by 1983. Then in 1990 Mack became a wholly owned subsidiary f Renault.

I'm wondering if Western Star engineering said it was required to keep the frame from flexing when loaded. Its quite a long span between axle sets for 220,000 pounds of gross weight triple frame rails or not...

Its like the Kwic Loc that Overnite used for a period......Kind of a neat video.

I always wondered why the mega carrier fleet trucks that never leave the interstate have live tandems. I would think a single axle with a drop axle is adequate to move legal weights across the interstate. Plus and you probably get 750-1000 pounds of weight savings and better fuel mileage due to less unsprung weight and rotational inertia of the second drive axle and power divider.

That is a tough question to answer without any background information. If your goal with this truck is hobby/restoration then I see no need to change it. Personally I like all my antique/hobby trucks to be as original as possible and there is absolutely nothing "wrong" with positive ground. As stated previously it is actually a much more robust and theoretically better for a vehicle's electrical system. If your intentions are to use the truck in some capacity that will require the use of more modern electrical components for body upfitting, signaling, etc.; or you are doing a restoration and want to add modern accessories, then it would probably be wise to switch it to negative ground. If the truck is original the switch should be fairly simple as the a truck of that vintage would be pretty basic electrically speaking. The biggest thing is the starter. If its a Delco Remy 40MT or 50MT then it is a series wound motor and changing the polarity will have no effect on its direction of rotation. If for some reason it the starter is "something else" that has permanent magnets for the field then it will change rotation by switching the polarity. I guess it all just depends on what you are trying to accomplish and what you are comfortable with....Hope this helps.

I could be wrong but I don't think you need to change the hubs. You just need to get rims for tubeless/radial tires. There have been a lot of forum threads on this subject over the years. I have a set of 8 brand new 12.00x24 deep lug tires I need to get rid of and would sell......Pittsburgh, PA area.

Your thinking about that wrong. With either way you will have electrically motivated corrosion of one component or another. In a positive ground system the sacrificial anode is the vehicle itself (chassis and bodywork). In a negatively grounded system the wires, connections, and electrical components become the sacrificial anode(s). So in theory a positively grounded vehicle would be more likely to be "rotted out". However, with that being said the amount of chassis/body metal lost due to electrical corrosion in a positive grounded system would be miniscule whereas the same amount (mass of metal lost) of corrosion in a negative grounded system could have much more effect on the vehicle due to corroded connections and components as well as dissolved wires. With modern insulation materials and much more robust connections the "problems" associated with negative ground have become a moot point. There is still is a better theoretical justification for positive ground. When you consider the electromotive series of metals negative ground is incorrect. Why negative ground is the normal convention is a topic for a different discussion.

I always wondered about calling a parts place in France. Presumably there would be a lot more of these trucks over there since they just rebadged Renaults and imported from France. Maybe they are not obsolete over there yet if you can determine the model number they were sold over there as. Just a thought if you can speak the language.

You are pretty much SOL. They have been obsolete for several years. Pretty much your only option it to source some used ones from a salvage yard or change the axle to something with normal wheel ends and brakes. This has been brought up many times on here. Below is a link to the most recent thread I could find on the matter.....

For a working truck the biggest advantage to duals is redundancy. If you get a flat you can still travel to the nearest tire shop. Super singles save about 700 pounds of weight over 11R22.5 dual tandem tires and wheels but if you get a flat on a single your are SOL on the side of the road. For a truck like this (I assume its just a hobby truck) I think the singles would be fine. Certainly has a different look to it.

I always wondered about calling a parts place in France. Presumably there would be a lot more of these trucks over there since they just rebadged Renaults and imported from France. Just a thought if you can speak the language.....Good luck

You are pretty much SOL. They have been obsolete for several years. Pretty much your only option it to source some used ones from a salvage yard or change the axle to something with normal wheel ends and brakes. This has been brought up many times on here. Below is a link to the most recent thread I could find on the matter.....

If your objective is to just replace the generator with an alternator its not necessary to convert the entire truck's electricals to over to negative ground. One of my trucks has an alternator charging one 12V battery on each side. But the whole truck is still positive ground. Originally it would have had positive ground 6V batteries on each side hooked up in series to make 12V and then the two sides connected in parallel to provide enough amps and 12V. The previous owner did the alternator conversion. So I guess my point is the truck can have an alternator conversion done without changing over to negative ground.

They are available through various retailers online. Options are kind of limited though. Probably your best bet then take them along with your wheels to a commercial tire shop and have them changed. Not a lot of shops around anymore that want to mess with tube type tires and lock rings...... https://simpletire.com/brands/deestone-tires/d108#v=1&tireSize=9.00-20&mpn=ds2080&pageSource=sizeCatalog&itemId=140274&curationSeq=1&curationPos=4&badge=Best deal&curationSource=top-pick-top-picks&pick=special-deals&delivery=Del3&rad=EE

Saw this at the Adleman's yard in Canton, Ohio. Certainly a very strangely set up truck but its in like new condition. Kind of pricey but If somebody wanted a nice Brockway with not a lot of effort this would be a nice one to get. You could take the crane off and get some of your money back. then cut off the last 2 feet of frame and you would be good to go...... https://www.adelmans.com/1976-brockway-776 01-1976-brockway-90571-7-22.jfif

Saw this on Craigslist. Not mine just posting here incase someone is interested. Seems high on price but I think these might be rare? https://altoona.craigslist.org/hvo/d/duncansville-1958-mack-b61-integral/7515413766.html

I studied the differences, statistics, and metrics around the US healthcare system vs the government funded/run systems of our democratic industrialized peers and the outcomes they each produce. I'm not saying one system will or won't work in their respective societies. Additionally, "work" can be defined in dozens of different ways. My original point several posts back was that your level and/or status of employment pretty much dictates your access to healthcare in the US, while in all other developed countries most similar to ours its a condition of citizenship. Also as part of my previous point was that its tough in the US as a low income earner (or even middle income earner for that matter) to pay for health insurance (healthcare) because its so expensive. And if you loose your job that provides it for you then you loose your coverage and end up having to pay for it out of pocket. I imagine the small business and self employment landscape would be drastically different if it were the other way is all I'm saying. As a reference point to this I can direct you to the US Armed Forces and Defense Budget. Very few have any quarrels or even bat an eye that the US spends over $790 billion every year on "defense" spending, which is more than the next 10 highest spending countries combined. 790 billion dollars of tax money. US defense spending has probably created more advancements in technology, transportation, and material science than anyone can imagine. Just a thought......

I feel like it’s next to impossible to beat a Case 580L or Super L. I think they are the pinnacle of bulletproof backhoe design before case construction became the Italian CNHi conglomerate. Prior to the L series Case had been building backhoes since probably the late 50s or early 1960s. 3.9 liter 4bt Cummins under the hood make them ultra reliable and by now they are fairly affordable. I think they will dig about 18’ deep with an extendahoe. Case has the best boom design IMO. It’s over center in the locked position so it’s much smoother going down the road and just traveling in general (probably not an issue for you if it’s just a farm machine). I worked for an outfit that had 4 of them doing water and sanitary sewer infrastructure work. A superC, SuperK 4x4, superL 4x4 and a superM 4x4. The L and K each had over 12,000 hours on them and were still strong tight machines. The M was fairly new when I worked there and the old superC was dead tired but still worked and mostly just ran a hoe ram. I don’t think CAT ever made a good backhoe in my opinion. To me their expertise always seemed to be excavators and crawler tractors. I know in the rest of the world JCB is insanely popular but I don’t know of any around me. I see 100 cases and probably 20 cats for every one JCB.

The US ranks 46th on average life expectancy. 46th. A quick glance at the list of 45 countries with a higher average life expectancy, and almost all of them have government managed healthcare systems universally available to its people as a condition of citizenship. While life expectancy alone cannot entirely predict the effectiveness of a country's healthcare system, I can't imagine the millions of people living longer and healthier lives in these 45 other countries are somehow lacking access to good doctors and hospitals. Do they pay more in taxes for it? Maybe or maybe not. Additionally, the US spends almost twice per capita on healthcare costs as the next highest country. The list of metrics where the US ranks poorly compared to its democratic, industrialized peers with regard to its healthcare arrangements is massive. I studied this pretty extensively several years back and arrived at the conclusion that we just don't have it as good as we are led to believe. If you end up coming down with a condition requiring high level physical medical treatment the outcome is generally more favorable elsewhere depending on what the actual condition is. I will agree Obamacare is a complete hacksaw piece of legislation jammed through during the last weeks of the 111th Congress while the sponsoring party controlled the House, Senate, and Presidency. Probably did more harm than good. A disingenuous rhetorical question but I would answer "yes". Back to my original point: I'm not sure why your status and/or level of employment pretty much dictates your access to healthcare here when every one of our closest peers figured out how do it the other way a long time ago as well as achieve the same or better outcomes along the way.

From my observation, studying of history, and knowledge of economics this is the problem with the American system and the status quo in this country. Employers refusal to pay a living wage and/or provide benefits except for semi skilled and above jobs and even then the benefits are most times very lacking. $14.80/hr on a 40 hour work week is a little less than $30,000 pre tax dollars. Literal poverty wages regardless of your location within the country. So your only option is to work 60+ hrs/week to make ends meet. I was in a barber shop recently and listening to an old timer say how he couldn't understand how McDonalds and such couldn't get enough workers even at the $15.00/hr they are now offering. He went on to say that he only made $2.75/hr washing dishes at a restaurant in 1970-71. I didn't join his conversation but quietly pulled out my phone and checked an inflation calculator. $2.75 in 1970 is equivalent to $21.00 today. Good luck finding that wage for an entry level job that requires zero skill in todays world. Benefits are the same story. Hollowed out an stolen over the years so more profits are funneled to the top. It's actually rather comical (and sad) to me your healthcare is somehow coupled to your level and/or status of employment in the US. The richest county on earth can't figure out how to provide healthcare as a condition of citizenship. Every other industrialized and developed country got it decades ago. I often wonder how different the small business landscape would look if healthcare here wasn't such a burden to obtain and/or pay for. Pretty tough to quit your job and start your own gig while always worrying you could get hurt and how you might pay for medical bills or an insane insurance premium. If you have a family it only gets worse. I checked what it would cost me out of pocket per year to buy the exact same health insurance my employer provides my family and I. I forget the exact amount but it was somewhere around $24,000....nuts. Good luck on your job search Joey. I hope you find something that pays you well enough while still giving you time to play with Mack trucks. ( and contributing on BMT).

I was just wondering since it was determined to be diesel fueling alone that caused the runaway can the engine overspeed on diesel fuel alone? Can the pump/injector lines supply enough fuel to kill the engine by themselves? Typically a runaway is from an unrestrained lube oil supply in addition to diesel fuel. Just wondering how much more the pump and injectors/lines can give beyond wide open throttle. I don't know just asking.....

Is Bristol Donald still in business? I see their beds a good bit on older Jersey and New England spec trucks (super heavy tandems) that come up for sale. Can't say that I have seen any newer trucks with one of their beds on it. The triple scope hoist is unmistakable.