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HK Trucking

Pedigreed Bulldog
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Everything posted by HK Trucking

  1. Here's the one that I had. Note the bulldog on the hood, and the Mack "backrest" on the seat. It was a 1972 model, I was the 2nd owner. Sold it about a year ago when I moved to a smaller place in town. .
  2. Rob, I'm older than you and I like loud pipes! If it was up to me, mufflers would be outlawed. As for the "out of touch" part, well, that would probably apply. lol. .
  3. Actually there is no difference between a DM chassis that is a dump truck or mixer, and a DM chassis that is a tractor. It's just that instead of having a dump body ot mixer mounted on the chassis, a DM tractor has a 5th wheel and hookups for trailer air & electric. The DM800 had exclusively the steel fenders & butterfly hood. The DM 400 & 600 were available with either the steel fenders & hood, or the fiberglass nose that was like a U model.
  4. That brings up something I was wondering about: How did that work in Australia with the DM/U model cabs being offset to the "wrong side" to be compatible with driving on the left side of the road?
  5. No, thanks. So what kind of trans did you decide to put in the truck when you reassemble it? .
  6. Mike, instead of that, maybe you should just sell him the TRL1076 and corresponding PTO as a package deal.
  7. We're all just trying to help you, no need to get sarcastic. An MB685 with a 5 speed would have been equipped with a TRL107, TRL1076, or TRL1078 from the factory.
  8. I don't think they used resistors on 6 volt systems. To my knowledge, resistors were introduced when 12 volt systems came on the scene in order to cut the primary voltage back to about 8 volts to prevent burning of the points.
  9. Glider kit, put together with a little of this and a little of that? That 722 would never be installed behind a 237 from the factory. Is the truck a MB685, or is it a MB611 or 609 or 607? If it's a 611, 609 or 607, then it would have originally had a thermodyne engine, which would account for the TR722 transmission, then maybe someone transplanted the 237 Maxidyne engine into it at some point. An MB685 would be factory equipped with a ENDT675, 237 hp Maxidyne, and would have the 107 series transmission. Or, if it is indeed a MB685, maybe it originally had an Allison automatic, and the Allison took a dump (as they usually do), and someone converted it to manual by putting that TR722 in it.
  10. A 77 MB with a 237 should have a TRL107 or TRL1076 or 1078 if it's a 5 speed. Pull the plate off the PTO opening in the side of the trans and make sure there is a PTO drive gear in there, I've seen some that didn't have a PTO drive gear from the factory. Not a big deal if there isn't one, you can install a PTO drive gear without removing & disassembling the trans.
  11. A leak before the turbo would allow dirt (unfiltered air) to be drawn in, but would not cause a boost leak. A leak after the turbo (pipng, boots, CAC, intake manifold gaskets, or that line from the intake manifold to the air compressor) would cause a boost leak.
  12. Actually, for those of us who have "been there & done that", it's more like a religious experience. .
  13. The one thing that would be "prettier" than that is sitting in the driver's seat with the passenger side window rolled down and listening to it in person!
  14. I never actually took any measurements to compare the spring spacing and U bolt locations of the B61 vs the B81, so you'd have to check on that if you find an axle from a B81. Another good feature of the FA 600 front axles is that the tie rod ends sit on top of the steering knuckle arms instead of underneath like on the FA 522. That keeps the tie rod up higher where it's less likely to get damaged when backing thru soft material where you're dragging the axles. Also, I recall that the tie rod ends lasted a lot longer on the FA 600/601 than on the FA522.
  15. I suspect an intermittent leak somewhere on the suction side of the system, allowing the transfer pump to suck air instead of fuel.
  16. I suppose you could upgrade to something newer, but if the intent is to keep a "stock" appearance, I'd recommend swapping in a FA601. Here's a photo of a B61 with the FA601 axle: (Incidentally, the truck pictured above is owned by a good friend of mine who is also a member of this forum, "B Model Chet.) My former B61 with the FA522 axle: My former B81with FA 600 series front axle: .
  17. The Thermodyne diesel operating RPM range was 1500 to 2100 RPM's. If you lugged them down below 1500 in a pull, you'd melt pistons, blow head gaskets etc, hence the need for Duplex, Triplex, Quadruplex transmissions to give enough gear ratios to keep the Thermodyne engines in that narrow RPM band. The Maxidyne engines (ENDT675, ENDT676) had an operating RPM range of 1200 to 2100 RPM, lugging them down to 1200 RPM in a pull wasn't harmful, basically due to the fact that the Maxidynes had piston coolers* (nozzles which spray oil on the undersides of the pistons) to dissipate heat, so in an "on road" situation, a 5 speed transmission was sufficient to keep within the 1200 to 2100 RPM range. For on/off road use such as dump trucks or concrete mixers, the 6 speed transmissions were used with the Maxidyne engines. The 6 speed was a 2 stick transmission, a 5 speed with an extra lo gear in the compound for off road use in severe conditions. Some early 6 speed transmissions (TRDXL1070) had an overdrive ratio in the compound which you shifted into once you were "tached out" in 5th gear, these used commensurately lower rear axle ratios compared to the other 6 speeds (TRXL107, TRXL1071), which were direct drive 1:1 ratio in high gear. The ENDT 675 and 676 Maxidynes were the same basic engine block as the 673/711 Thermodynes and are nearly a bolt in swap for a B model, with the exception of the differences noted by Paul in the previous post. *The ENDT 673B and ENDT673C (turbocharged 673's)also were equipped with piston cooling nozzles, even though they were Thermodyne engines.
  18. It's located next to a church so that Peterbilt buyers & owners can conveniently pray that their Peterbilt won't break down as they're driving it off the lot. Or, the Peterbilt owner can go to confession, after committing the sin of buying a Peterbilt. .
  19. The "Storm Troopers" are out there in WI too. This past week the motorcycle cops have been working in packs of 3 or 4 on a stretch of highway. A radar unit sits on an overpass, and radios to the bike cops to tell them which vehicle to go after. .
  20. What axle is in it now, the FA522 or the FA601? If it's got the 601, that's the same thing as the "B81" front axle. Never seen one of those break, even in the "old days" when we overloaded the sh*t out of 'em.
  21. Let me guess. The range shift synchro took a crap? The range shifter in those transmissions was the weak link, other than that they're much tougher than a Fuller. Mack transmission has triple countershafts, Fuller only has 2 countershafts. If it was mine, I'd fix whatever was wrong with the Mack transmission rather than switching to a Fuller.
  22. For a "classic" dozer, I'd pick a TD25 B or C. Those had the hi/lo for each track individually so you could keep power on both tracks when steering. That feature wasn't available on a Cat dozer back then. Also the UT817 International engine sounded awesome with a straight pipe! The weak link in those TD25's was the transmission, however. For a modern dozer, I would pick any of the "hi sprocket" Cats. We've got a D6, 2 D7's and a D8 where I work, and those things will push some serious dirt. The "little" hydrostat Cats ain't bad either (D3 &D5).
  23. Deport the illegals? Shit, here in WI they're going to allow them to get drivers licenses, and also get free education in the state university system. I just wonder what part of the word "illegal" our legislators can't comprehend. .
  24. I remember "back in the day" that some guys would substitute an 8 volt battery in those old 6 volt systems to cure hard starting problems. Those 8 volt batteries looked weird in the old "exposed cell connector" format, and they had 4 vent caps.
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