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67RModel

Pedigreed Bulldog
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Everything posted by 67RModel

  1. Long gone. The blue one got sold for parts and its major components may have lived on. The DM800 got scrapped and probably sent to China to be turned into some worthless trinkets that serve no real purpose. Its sad I couldn't find any takers at scrap price. The cost of shipping a 19,000 pound back then was very expensive. That was in the 2020-2022 timeframe when the Covid supply chain BS had everything screwed up and the cost of shipping anything was crazy. I saved the ignition switch out of it that had a matching Mack bulldog key. That is all that's left of it....
  2. Do you know what cubic inch V6 it has? That engine family is crazy interesting and has a lot of other unique engines based off of it.
  3. Those frame channels look way bigger than any I have ever seen on a regular loadstar. I always thought they were some of the best styled trucks of the time. That cab and front clip design is timeless.
  4. Like I said I have two of them. And yea they are different from the one on this superliner. Attached are some pictures of my newer one. It’s an 88 or 89 model. It’s in near perfect condition. Just needs painted. My other one is from the early 1970s and is a little different. The overall shape and design are the same but it has windows on each side is the main difference.
  5. Does Rest Rite sound familiar? They were very popular on with operators of Mack trucks before Mack produced their own integral unit. They were manufactured not far from me. I have an interest in them and own two of them. I'm actually just curious. I can't tell for sure but it closely resembles one. The black paint and picture resolution make it hard to pick up on any fine details. Thanks.
  6. Yes same. Computer controlled and clutch actuated with air pressure. Detroit DT12 is another one
  7. Does anybody know what make of sleeper it is? I never looked at the original listing.
  8. I guess now that I think about it I'm not sure if the grade gripper is for trucks with a manual transmission or if its specific only to trucks with the M-Drive automated manual. I don't really know. It has to be a part of the M-Drive system so the air actuated clutch can engage smoothly without the truck rolling backwards. Perhaps its also a part of a manual setup now as well. Somebody more familiar with the new stuff will probably know. My passenger car with 5 speed manual has the same technology and its super annoying if you actually know how to drive a manual....
  9. It is a new age nanny device to help "drivers" who don't really know how to drive a manual transmission actually drive a manual transmission. It keeps air pressure applied to the service brakes for a period of 2-3 seconds after releasing the foot valve. This is supposed to give someone time to get their right foot over to the throttle and start giving the truck fuel and not roll backwards if stopped on an incline. Hence the name "grade gripper" 🙄
  10. A 690S is Vocational spec with the Maxidyne version of the E6/E7. It will be either 250, 275, or 300 horsepower Maxidyne. And generally have a 6,7, or 8 speed vocational transmission, which is basically just a regular 5 speed with either 1, 2, or 3 off road creeper gears. Paired with really deep rears. All three of those transmissions have the 0.6:1 overdrive in them so there is that really annoying gap between 4th (direct) and 5th gear. 4th gear your maxed out at 40/45 mph and 5th gear it takes off like a rocket ship and has poor gradeability. They are actually a great setup for certain types of work and terrain. I imagine in Oklahoma where its all flat would be a great set up.
  11. I have seen one of these in person before. It would be completely worthless for anything other than what it is now. They have super deep gears and a very low top speed. They have to move a lot of weight but an airfield is completely level and no need for a lot of speed. I guess it could be used as fuel truck on a big construction site but you would have to trailer it everywhere because the top speed would be too slow to take on major roads and highways.
  12. I assume its a T310M transmission, which is Mack's take on the 8LL. 8 road gears. 4 under, 4 over. The farthest left two holes are LoLo and Lo where Reverse and Lo/LoLo would be in an 8LL. The big difference is the multi speed reverse with the Mack Transmission, which for certain kinds of dump trucking is a very useful option to have. Just know the Mack transmission will cost you a lot more during rebuild/exchange time and honestly all else being equal will probably not last as long as an 8LL. With that said I would prefer to have the Mack T310M over an 8LL in my truck. 2008 was a horrible year for heavy duty diesel emissions standards. It was like no manufacturer was prepared and just put out a bunch of garbage that didn't work and the customers suffered. A friend of mine had two 2008 MP8 Pinnacles or whatever they were called at the time and they were literal rolling pieces of shit. The mufflers had more wires coming out of them than a space shuttle and they spent more time at the dealer than working. I could not imagine owning a 2008 that's pushing 20 years old now. Do yourself a favor. Buy the 2000 RD, fix or overhaul whatever it needs, and go to work. You will be better off.....
  13. It looks like a complete disaster in that warehouse but I give these guys extreme credit for keeping their used up trucks and parts under roof and out of the weather. Not rotting away in some field or lot.
  14. Saw this listing on Facebook Marketplace. No affiliation. Just passing the information along. Looks like it could be a little honey hole for someone. Mack R Model Tractors/Semi-Trucks for Part out/Sale (15 available) - Commercial Trucks - Chicago, Illinois | Facebook Marketplace | Facebook
  15. Honestly If I was Johnny Law I would trust the VIN stamped into the frame rails to be the actual VIN of the vehicle. So long as that matches what is on the title what's the problem? I ran into this issue exporting a truck once. Door had been changed and the VIN the port people were looking at didn't match what was on the title and bill of sale. The dock workers initially refused to load the truck onto the boat. A bunch of phone calls later had them looking at the frame rail and all was good. It wass partially my fault for shipping the truck without removing that door tag. The door had clearly been changed. The cab, hood, and passenger door was white the drivers door was blue.
  16. There are all kinds of cheap shop and service manuals for K series Case 580 backhoes on Ebay. I saw a full set with a parts book for $108. I would snag a full shop manual for it and see what it has to say.
  17. Looks like there is another digit after the 31744 on the frame rail....looks to be an "8" in smaller font.
  18. Is it an Allentown (US) built truck? Is the suspension original to the truck? I assume you speak English since your written English is very good. If yes to all three of those then just call Watts Mack in New Alexandria, PA and have them look up the part numbers you need. You will just need to give them the VIN number of the truck. 1988 is still readily available information for them. They are classic and antique Mack experts and actually own/host this website. They can get you the info you need.
  19. Here is another super clean and straight 1969 R model about 100 miles away in Lowell, Indiana. 1969 Mack r model - Commercial Vehicles - Lowell, Indiana | Facebook Marketplace | Facebook
  20. I don't know the history on them or how the system evolved over time. I was on a quest a year or so back to understand the LDA system on mechanically governed E7s and in the process came to understand how puff limiters work as well.... I never did find out if the torque limiting valve was only on Mack transmissions or if it was included on vendor transmissions as well. I just know how they work....
  21. This is somewhat inaccurate. The puff limiter works off manifold pressure in the reversing valve on the intake manifold. Fuel pumps on trucks with a puff limiter system are full rack by default when the truck is stationary an parking brakes applied to aid in cold starting. Once the spring brakes are released, regulated chassis air is sent to the air cylinder on the injection pump. Once boost pressure is sufficient for full rack the boost pressure overcomes the air pressure supplied by the parking brake valve via the reversing valve that is tapped directly into the intake manifold. Boost pressure and chassis air pressure are always hydraulically "battling" each other in the reversing valve for control of the air cylinder in the injection pump. Once running, if the transmission is put into reverse and/or the low forward gear(s) the torque limiting valve is activated. It is piped from its location on the transmission up to the reversing valve (puff limiter) Once its activated it dumps the boost pressure to atmosphere that would normally build up in the system and allow full rack travel. By doing this rack travel is limited in both systems to protect the drivetrain in the low and reverse gears. Once the shift rails are moved to select a higher gear the torque limiting valve closes and allows boost pressure to build up and allow for full rack travel in the injection pump. The transmission (torque limiting valve) is part of the system but not the primary component. The torque limiting valve on the transmission is only there to protect the driveline. I would think by switching to an Allison and you could eliminate the transmission portion (torque limiting valve) of the system because the the torque converter in the Allision will provide a "cushion" to the driveline. Or just know how to use your right foot in low gear or reverse......
  22. A friend of mine had a large fleet of Mack roll off trucks. E7s and ASET engines. 35,000+/- hours was routine before overhaul. His fleet average mph was around 25 mph. I think most vocational trucks are around that 25mph number unless its some type of specialty truck that does a lot of stationary pto work like a stone slinger or volumetric concrete mixer. I would expect an over the road freight truck to be in the mid to high 40s for overall mph.....
  23. Look at the still picture of that first video with the man sitting on the hood of his car. In the background there looks to be a bobtail Brockway and a White 9000 pulling a van trailer. I'm not sure if its a 9000 or a Road Boss but its definitely a White cab. I don't recognize the grille.
  24. This sounds rather trivial and maybe you already did it but does he remember who he sold it to? If so track them down and and see if they still have it or who that party sold it to. Who did he work for or who was the truck leased to? Canada is a big area. What part of Canada would it be in?
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