glenbjackson Posted April 9 Share Posted April 9 Went to Mack museum lovely time seen this wondeing what this is. Dont see any brake brackets nor looks like a wear surface....a extra flywheel for mountain driving??? Ps anybody know which parts they fear flying apart in the turbine Mack? Any video of it running?? I'm sad I didn't look the trucks over more to actually study them... Another visit!!! Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/ Share on other sites More sharing options...
glenbjackson Posted April 9 Author Share Posted April 9 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594379 Share on other sites More sharing options...
Joey Mack Posted April 9 Share Posted April 9 Is that a dampener ? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594380 Share on other sites More sharing options...
70mackMB Posted Friday at 02:15 AM Share Posted Friday at 02:15 AM Wasn't that day cab an "All Wheel Drive" for UPS out west? Remember someone on here found one in a truck junk yard some where out there. l think the headlights are in the bumper because the cab is too high. .....Hippy 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594387 Share on other sites More sharing options...
glenbjackson Posted Friday at 09:54 AM Author Share Posted Friday at 09:54 AM Yes I think this is a UPS 4x4 mountain truck. Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594392 Share on other sites More sharing options...
glenbjackson Posted Friday at 10:02 AM Author Share Posted Friday at 10:02 AM I'm thinking on it possible help shifting... Maybe when middle shaft disconnected spinning helps synchronize gears for either case or transmission Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594393 Share on other sites More sharing options...
br549 Posted Friday at 11:24 AM Share Posted Friday at 11:24 AM Bought a new F model single axle 237 5 speed to run from TN to CA in 1975. After about 30,000 miles it quit pulling out in AR, we were told by road side garage the crankshaft was broker. We took another truck and hauled it back. We pulled the transmission and one of the clutch disk had no splines in it, looked like it was machined with a lathe. It came with a big metal round disk on the yoke from the factory. Got in touch with Mack regional manger and he said it was caused by torsional vibration and they sent a vibration damper like on the front of the crankshaft with fluid in it that would replace the steel disk. Next clutch went over 500,000 miles. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594394 Share on other sites More sharing options...
glenbjackson Posted Friday at 12:33 PM Author Share Posted Friday at 12:33 PM Ok so Joey Mack 12 hours ago, Joey Mack said: Is that a dampener ? Seems so. Ok Cool br549you remember that part number lol I don't see a damper anywhere on the driveline hurting... I'm try to add one on my setups. And refresh all motor dampers as well. Behind the trans seems easily enough I gotta check my connections and yokes Maybe get with fluidamper, get one made or try to make one 😮💨. Thank you all Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594397 Share on other sites More sharing options...
Vladislav Posted 4 hours ago Share Posted 4 hours ago Since that's 4x4 and you need to shift the transer case to Lo sometimes and that's air operated shift it looks like there's a reason for the input shaft (the output from the tranny) to spin longer. So my bet is it's a flywheel indeed. Not a balancer. Although a balancer could work as a flywheel too. Very interesting subject you discowered, thanks for sharing. As for the truck itself late Mike Harbison (Superdog) purchased it from somewhere. He was offering it to obtain a new home for some coins but at a certain time resolved to donate it to the Museum. I may be wrong on the story but that's how I remember the chain of events. RIP Mike. Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594570 Share on other sites More sharing options...
70mackMB Posted 4 hours ago Share Posted 4 hours ago 27 minutes ago, Vladislav said: I may be wrong on the story but that's how I remember the chain of events. RIP Mike. Thank you Vlad, that does sound familiar. RIP Mike. .....Hippy 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76564-mack-aux-flywheel/#findComment-594574 Share on other sites More sharing options...
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