67RModel

One thing to think about if you swap your green cab onto the tandem dump chassis is the brakes. Looks like you have BW type 20 brake chambers on your drives. I believe the part number is 227851. As you probably already know they are just service chambers with no provisions for spring / emergency brakes. I assume this truck has a hand brake lever in the cab and a brake drum assembly on the output yoke of the transmission for parking. The service chambers you have are long obsolete and finding rebuild parts / replacements for them is very hard. The other bad thing about this setup is the fact that you can't just stick a 30/30 chamber or similar on there with some additional air plumbing and call it good. The clearance to the wheel is too tight. The mounting hole center-to-center is the same but the overall diameter and length are issues. A 20/24 chamber won't even fit. I have the same setup on my B81. I pondered this a lot and tried several different types and sizes of brake chambers. Basically your only two options are to 1: fabricate brackets that offset the chamber toward the frame to gain clearance from the wheel and use an offset slack adjusters. Or 2: obtain a pull style spring brake only chamber and mount it 180 degrees of the service chamber to pull on the slack adjuster with a small chain. I have seen several old (mid sixties) DM800s with this setup from the factory although they used steel rods instead of chain. I guess it was before the compound chambers were perfected and/or common. Haldex still makes pull type spring brake chambers but they are insanely expensive (around $400 each). I don't think you necessarily have to change them over since I'm guessing it will be just for hobby use / antique vehicle but for me the thought of a 15,000 pound vehicle rolling down the road with no way to stop it if there is a sudden air loss is scary. The good news is for a hobby truck you probably only need to convert one axle to have emergency brakes since you won't be hauling any weight. Just something to think about if you use the tandem chassis.....

Also, the original Maxidyne trucks from say 1966-1972 have two as well. However, the lower one is open ended under the hood. I assume so the intake air stream is partially warm. These trucks didn't have charge air coolers so I don't know why they did that but they did......

Darn. I gave away a good FRO15210B a few months ago when I was cleaning out my garage. I had it in there for years and nobody wanted it. I think the guy just turned it in as a core. He had a deal with Weller I think that if he gave them two 9 or 10 speed cores they would sell him an overhauled 13 speed. ¯\_(ツ)_/¯

I did not see this until just now. I will check in a day or two and let you know. $2000 for everything.

I don’t know if it’s like this all over Pennsylvania but in my area/district there is a program if you get a DUI or something like that the local magistrate(s) will order you to serve community service with PennDOT. From what I have heard and seen it amounts to riding around in the back of a crew cab pickup all day and sleeping. I see people all the time sleeping in the back seat of these PennDOT rigs around me.

I put this up in Craig's other thread about if a 350 Cummins would fit under the hood of a B42. I have this R model with a super healthy 237, 6 speed lo hole trans and Mack rears if someone needs a powertrain. Truck is crusty but the powertrain components are great. And it has jakes on it. $2500 in Pittsburgh, PA.

Yes runs and drives like a sewing machine. Has not been on the road in years but used as a yard tractor for a long time. Frame is crusty but the engine, trans, and rears are in great shape. Would be great for somebody that needs a good powertrain. $2500

I still have this 1972 R model for sale. It has a 237 with jake brakes and a twin stick 6 speed if you are interested. I don't need a lot of money for it. I'm also in the Pittsburgh PA area.

I found the Kijiji Canada listing for it: https://www.kijiji.ca/v-heavy-trucks/markham-york-region/1955-mack-for-sale/1636962965 It has a v12 Cummins engine, 8 speed transmission, and a 50:1 auxiliary transmission.

Did you buy it off the original author of this thread? jakebrake86? It looks like he has not been around since 2017.....

Like Paul said if you buy one you are essentially paying too much since it really has "no value" other than whatever its worth to you. You will be buying it for a hobby and most likely it will not make you money since it wont be a working truck. Every step of the way after you take ownership of it will cost you money (lots of it). Parts are getting harder to find every day and more costly. 1986 was 36 years ago and $700 then is right around $2000 today. Also, in 1986 there were probably tens of thousands more B models then there are today with a lot of them still working. Today the ones that are left are going to bring more money due to their relative scarcity. That's just the way of the world.

I know from watching old promotional films Autocars were 100% hand build and assembled back when they were an independent company. Every hole in the frame was drilled instead of punched, etc. Then White purchased them and like most corporate mergers and acquisitions it was a race to the bottom in the name of stock price and favorable quarterly reports. By the mid 1970s they were just rebadged Whites then Volvos.

Yes I would go back and make sure what you are saying is actually happening because its very backwards. When you press in your red button on the dash a flow of air will pass through the red emergency line hooked to the trailer and release the spring brakes on the trailer as well as fill any onboard air tanks the trailer may have. Once the red button is pressed on the dash air should only pass through the blue hose when the foot valve is depressed or the trailer brake valve (trolley valve) is used. If what you say is in fact happening then I guess the two places to look would be the air supply valve (red and yellow buttons) or perhaps the tractor protection valve. I cant understand how that would be happening unless somebody put a new set of hoses on the truck and switched them but then if you had them hooked up to the same color glad hands on the trailer the spring brakes on the trailer would have never released.....Something ain't right here......

Plus with 400 hp it probably wont slow down much on gradual hills once up to speed. Meaning once you are cruising at top speed you will probably only ever have to downshift to 7th (direct) to maintain your speed.

I suspect it will pull like a freight train out of the hole and accelerating. Startability on steep hills loaded heavy will be of little concern with those slow rears and the two low gears in an 8LL. Your top speed will be slow though with rears like that. on 11R24.5 rubber it will probably be around 57-60 mph top speed. My RD with 6.06 rears and T2070 (0.6 OD ratio) tops out at 62 mph on 11R24.5s. An Eaton 8LL has a 0.71 overdrive so it will be slower plus your rears are slower. Without doing the math I would say somewhere from 55-60 mph at 1800 engine rpms. If you have small tires wit will be even slower...

I travelled to rural Southwest Virginia this past weekend to pick up a sleeper I need for a future project. The gentleman selling it ended up have a pretty extensive collection of old Mack parts and some trucks. He was in business from the 60s up until 1998 and saved everything. He has trailers full of parts. Lots of differentials and carriers, transmissions, engines, etc. I also saw several camelback complete cutoffs laying around. As far as trucks he has two complete mid 80s R model tractors and a complete B61 single axle tractor with concave cab and a late 40s or early 1950s (guessing) White Super Power tractor. Also lots of other trucks, tractors, and just general "stuff" laying around and its all for sale. I don't want to publish his information directly on the internet but if anyone is interested in reaching out to him PM me and I can pass along his contact information. Newport, VA just west of Blacksburg.

I'm not really up on my Mack 12 speed knowledge. I know there were several versions of this transmission produced. What exactly is a TRTXL 1070B? How does it differ from T-1070, T-1070B, TRTXL-107, or TRTXL-1070? I know what they are but just not the differences in each model. I drove an Eaton Super 10 for a while and understand them to be the same principle except for a deep reduction for gears 1 & 2. I might be interested in this transmission to have on hand for a future project.

The answer to that question is easy to answer in Pennsylvania because Independents / No Affiliation cannot vote in primaries and Republicans can only vote for Republicans......their man here for Governor is super Trumpy and is essentially a QAnon person. He also stormed the Capital on January 6th, 2020. Its nuts this guy is on the ballot. Agreed.

Super old thread but 2019 film "The Irishman" had a nice B model freight truck in it. Robert De Niro drives it to deliver a load of weapons to E. Howard Hunt for the Bay of Pigs invasion.

^^^^^This. I can't believe that the Republican primary selected Dr. Oz as their candidate. If Dave McCormick would have won the primary this wouldn't even be a contest at this point. To many people don't believe Oz is genuine for many reasons. Its sad the guy was born and raised in Cleveland OH, lived summers in Turkey, lived and worked in New York City until his TV career started in 2009. Then lived in Southern California until now he all of a sudden is the best person they could come up with to represent PA in the US Senate. To be fair he did live in Philadelphia for a time in the mid 1980s while as a student attending the University of Pennsylvania. Unfortunately he is just a big of a quack as Fetterman. He is just wearing different rags. The governor's race is just as bad. Can't believe the Republicans came up with this guy. I will bet my lunch and this week's pay the Governor will remain a democrat because their candidate is very moderate and appeals to lots of people on the right. ¯\_(ツ)_/¯

$2163 is equivalent to $19,815 today. I pretty positive there is no possible way to buy a brand new regular cab, long bed, 2wd, base model, base engine, half ton truck for less than $35,000 today. Its nuts......

I would change the color to resemble the one pictured below. Something about the maroon and silver (I think the valve cover is gray now) just seems off. I have no clue about the mechanical design or features of the engine as the newest diesel engine I own is a 1994. The one MP8 I did drive ran and pulled like a freight train compared to any Etech, AI, or AC I was ever in with similar specs. Serious question: are the MP8 and Volvo D13 mechanically identical engines? How much different really is the software programming?

Yea whoever this person was seemed to have a soft sport for Diamond T trucks. Or they were very popular in that area for whatever reason and he ended up with all of them. I'm not sure if you read the fine print auction details but it says you can store your items there free of charge for up to a year if that helps you out at all. Maybe you could find some time in the coming year to just go out and pick them up?

Reminds me of when I got started into trucking on my own with my own equipment. I resurrected an old 1994 Volvo (WhiteGMC) with a series 60 Detroit. I got it set up to pull pneumatic trailers of frac sand into the Marcellus wells. The previous owner had the engine overhauled some 5-7 years before and parked it. It had like 50 miles on the overhaul from a reputable shop. The rest of the truck was pretty worn out but useable. I got started easy enough with a few small hiccups but nothing major. Probably around the fifth day of running it developed a miss after I had just unloaded and got sent for load #2. Foolish (inexperienced) me went and got that second load and came off the scale at 88,000 pounds. A lot of those sand yards were run by cowboys and would let you leave overweight if they overfilled you especially if you were working the night shift. It was about 30 miles back and every mile it was running worse and worse and the oil pressure was falling. Unfortunately the last 10 miles before my exit was a one lane construction zone with jersey barriers on each side with nowhere to pull over. Engine shutdown light came on. I was able to use the Override button to get far enough to crest the last hill before the exit. Coasted the rest of the way to the off ramp and it shut down down for good. Crankcase was way overfull. I was in a good enough spot that I didn't need to get towed immediately. Spent the night there broke down not knowing exactly what was wrong or how I was going to fix it or if it was even fixable at that point. Got a tow from a friend the next morning back to the shop that did the overhaul. Ended up being the #5 injector malfunctioned and was dumping fuel into the cylinder and getting past the rings into the oil. I dropped the pan and looked into all the liner bores with a flashlight and didn't see any scoring. Filtered the oil/fuel mixture with a sieve and found no metal particles or chunks. I put the pan back on with a new gasket, replaced the bad injector, and went back to work. It gave me another year and a half of trouble free operation. The owner of the shop that overhauled it ended up buying the truck off of me and he put that engine into one of his trucks. To my knowledge its still running like a sewing machine to this day. When I was in that situation that night I fully expected the worst and thought I was finished 5 days after I started. Ended up only costing me a few days of work, a $300 injector, an oil pan gasket and oil. I realize luck was on my side that day and probably should have ended much worse considering how far I drove it with the bad injector. I guess the moral of the story is it doesn't always have to end badly. Hopefully this is one of those times......Below is a picture of the next day when I got towed home. I remember it pretty vividly and just how sick I felt..... I had just eaten breakfast at Bob Evans and was walking back to my broke down truck.....memories lol.

I think they were a lot more pricey than we think. I remember a guy saying his W900 with bunk in the early 1970s was around $70,000. I bet this B873 in the early sixties was well over $50,000 especially since it has a vendor engine. My official guess is $52,000.