Joe Cummings
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Everything posted by Joe Cummings
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http://www.locknstitch.com/ I used to make my own pins/plugs but here is a site that explains it pretty well. Joe
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Hey does anyone remember the BCR kits? Back in the 60's mack made a kit to but a R Model style cab and hood on a B model. You could pick them out easily by the B Model steering collum and box they still used. They also had the fuel tanks mounted like a B Model, Not like an R Model with that bar that holds up the rear of the tanks and is the rear cab mount. Joe
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I would keep the square tanks before I drilled extra holes in my frame,but hey that's just me. Joe
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I was just thinking the same thing. Not too many dump trucks were built with 38s Joe
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It sounds like you must have some kind of problem with a liner or a counterbore. if you have it apart again check the liner heights. Most times this isn't very critical on a inline 6 Mack but who knows these things are getting a little old. 300 miles is nothing on a turned up 711 they should last a couple of hundred thousand.
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For a short non structural crack like in a cooling jacket we used to fix them with a series of threaded plugs. One plug overlapped the last. but it's a bit hard to explain. Really kind of a lost art Joe
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Rob the 711 had 20 stud heads but it didn't have fire rings on top of the liners like a Maxidyne or an ENDT673C. Most of the 711s didn't have the oil sprays for piston cooling either or a provision on the block to add them so you had to watch how hard you pushed them when they were turned way up. I got away with hot rodding them a bit if they were in short duty cycle applications like dump trucks for around the city where you load them hard and then let them cool off. I'm just curious how long are your head gaskets lasting?
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Twin Stick Transmission Shift Patterns
Joe Cummings replied to ThaddeusW's topic in Engine and Transmission
There was also a another version of that low hole box with an extra low reduction in the compound. It was designed for concrete mixers so they could do curb pours without working the hell out of the clutch. I could get a few extra gears out of these if I shifted them right. And then there were the "high hole" version of the 6 speed with that big heavy triple case. You went through 5 in dirrect and then shifted the compound into overdrive. I used to see these alot in DM600 & 800s with Maxidynes and rears #55,000 and greater. -
Twin Stick Transmission Shift Patterns
Joe Cummings replied to ThaddeusW's topic in Engine and Transmission
I have the same problem with those. I think if those B-67s are put together right they have a smaller wheel. But even with the right one I never could drive one far. Joe -
I remember working on one of these back in the day. It was in a LJ and had a duplex behind it and a #29,000 rear axle. I kind of remember it looking kind of like a EN707 gas motor but with injecters going strait into the side of the head. I think it had some kind of American Bosch pump but I'm not sure. Joe
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What's wrong with a 672 inch 2-valve mack with an APE pump with 11 mm barrels? I have gotten alot of power out of these engines with a little recalibration of the fuel settings. Move the stop plate in the govener foward and I'll bet you can get 400 HP or more out of an 672 with a turbo. But it will break that quad box, they were only rated for about 700 foot pounds of torque. Joe
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