1961H67 Posted November 24, 2022 Share Posted November 24, 2022 Glad you have a good block & crank, When You get it back together and you will never have to worry about it again! Love the M715 ! You know that Mack’s & Jeep’s are my weakness, I can’t pass one up ! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-515942 Share on other sites More sharing options...
Popular Post mattb73lt Posted November 29, 2022 Author Popular Post Share Posted November 29, 2022 All stripped down and hopefully heading off to the machine shop tomorrow for some needed work. Well, I gambled and lost with this engine. I thought I had a good one from the trusted person I bought it from all those years ago. From all the evidence we saw as it came apart, it was definitely played around with internally and really should have had a major overhaul back then. A lot of unqualified stuff done or let go. Nothing horrible, but all things that led to it's demise. It'll get done now, properly. Luckily, nothing really got destroyed but the sleeve and piston on #6. And that crankshaft is just huge!! 3 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516305 Share on other sites More sharing options...
Joey Mack Posted November 29, 2022 Share Posted November 29, 2022 Forgive me... but.. yes the crank is huge in size, but I didnt see any HUGE issues. Am I correct? looks good to me.. I love this thread... Jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516307 Share on other sites More sharing options...
mattb73lt Posted November 29, 2022 Author Share Posted November 29, 2022 Yeah, no major damage or spun bearings. Dodged a big bullet there. The machine shop will go through it and magna-flux everything for cracks after it's hot tanked. Once they figure out if the crank needs to be ground, I can start sourcing what's needed for reassembly. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516309 Share on other sites More sharing options...
mechohaulic Posted November 29, 2022 Share Posted November 29, 2022 "old time cummins diesel mechanic";; how old ?😃. anyone from cummins CT from hartford (brainard rd ?).don't know what's there now. haven't been that way in many years. an instructor there :Fred Munday think his name. service manager gray hair with beard , the shop foreman = shorter guy. one of them may have been named Ray. there was a crew of the best quality, the knowledge and personality. the good days. DD had bill black (bell Detroit). Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516312 Share on other sites More sharing options...
mattb73lt Posted November 29, 2022 Author Share Posted November 29, 2022 1 hour ago, mechohaulic said: "old time cummins diesel mechanic";; how old ?😃. anyone from cummins CT from hartford (brainard rd ?).don't know what's there now. haven't been that way in many years. an instructor there :Fred Munday think his name. service manager gray hair with beard , the shop foreman = shorter guy. one of them may have been named Ray. there was a crew of the best quality, the knowledge and personality. the good days. DD had bill black (bell Detroit). He’s 76, Rocky Rockwell. The Murphy Rd Cummins by Brainard Field is long gone and now an O&G stone place. I used to go there when I worked at Brainard. Cummins Metro Power in Rocky Hill is the place now. Not too helpful, unless you spoon feed them what you need. Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516339 Share on other sites More sharing options...
mechohaulic Posted November 29, 2022 Share Posted November 29, 2022 ROCKY ROCKWELL ;;; you got the best of the best . He's my hero. we worked Mack together. then he did O&G . can't keep a good man down ;LOL he needs to be on his own . unfortunate situation with His wife . Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516341 Share on other sites More sharing options...
mowerman Posted November 29, 2022 Share Posted November 29, 2022 Right on man … thanks for keeping us up-to-date… Bob Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516347 Share on other sites More sharing options...
The Rubber Duck 006 Posted November 29, 2022 Share Posted November 29, 2022 (edited) Hmm seeing that crankshaft brings back some memories of when I was a junior in Highschool. We had one of those in our scrap bin at the vocational school I went to and some boys in my class didn't think I could pick it up. Yeah not only did I pick the thing up off the ground but I pressed it about 5 times over my head just for good measure hahahaha. Edited November 29, 2022 by The Rubber Duck 006 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516354 Share on other sites More sharing options...
Mark T Posted November 29, 2022 Share Posted November 29, 2022 No playing around ( lol ) Wait until you get it back together after everything you have planned. I think you'll be surprised at what one of those sounds like in the hood area. You'll likely not hear much at idle other than belts...and it'll run as smooth as the paint on that truck. Best part, you can go do whatever you feel like without any worries . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-516356 Share on other sites More sharing options...
Popular Post mattb73lt Posted December 8, 2022 Author Popular Post Share Posted December 8, 2022 That was quick. Got the engine back from the machine shop. I think it has the right patina to match the truck!! Actually, a “Loaner” clapped out 220 a friend loaned me so I can rob parts off to fix mine. A bunch of internal parts need to be replaced on mine that we found on tear down. 4 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-517750 Share on other sites More sharing options...
Red Horse Posted December 8, 2022 Share Posted December 8, 2022 4 minutes ago, mattb73lt said: That was quick. Got the engine back from the machine shop. I think it has the right patina to match the truck!! Actually, a “Loaner” clapped out 220 a friend loaned me so I can rob parts off to fix mine. A bunch of internal parts need to be replaced on mine that we found on tear down. Nice find Matt. And after all the hard and beautiful work you have done, keep the old saying in mind....."penny wise and pound foolish"😎 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-517752 Share on other sites More sharing options...
theakerstwo Posted December 8, 2022 Share Posted December 8, 2022 I see that engine has a perry water filter on it. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-517756 Share on other sites More sharing options...
Popular Post mattb73lt Posted December 8, 2022 Author Popular Post Share Posted December 8, 2022 19 minutes ago, theakerstwo said: I see that engine has a perry water filter on it. It did, now I have one!! 1 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-517759 Share on other sites More sharing options...
mowerman Posted December 9, 2022 Share Posted December 9, 2022 Excellent man good luck.. Bob Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-517794 Share on other sites More sharing options...
Popular Post mattb73lt Posted December 10, 2022 Author Popular Post Share Posted December 10, 2022 Gutting this 220 out. Removed the important camshaft today. Quite the effort to get to it. Threw it on my lathe to spin it by hand and clean it. Pushrods are all serviceable, saving about $800+ for new ones. Getting to the connecting rods tomorrow. As crusty and gummed up as this block is, it seems in better shape than the one I have. The deck is really clean and it is newer, 1964 vs 1959. So it could become a runner if mine proves bad or uneconomical to rebuild. 9 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-517939 Share on other sites More sharing options...
Red Horse Posted December 12, 2022 Share Posted December 12, 2022 On 12/10/2022 at 6:50 PM, mattb73lt said: Gutting this 220 out. Removed the important camshaft today. Quite the effort to get to it. Threw it on my lathe to spin it by hand and clean it. Pushrods are all serviceable, saving about $800+ for new ones. Getting to the connecting rods tomorrow. As crusty and gummed up as this block is, it seems in better shape than the one I have. The deck is really clean and it is newer, 1964 vs 1959. So it could become a runner if mine proves bad or uneconomical to rebuild. Matt, Tell us about that lathe!!! Looks like there is some history there😎 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518056 Share on other sites More sharing options...
Popular Post mattb73lt Posted December 12, 2022 Author Popular Post Share Posted December 12, 2022 7 hours ago, Red Horse said: Matt, Tell us about that lathe!!! Looks like there is some history there😎 It's a South Bend, believe it or not, from 1916!! Got it from a gentleman I worked for in high school. It was his father's and he used to build race cars. It's very complete and had a lot of accessories/attachments that came with it. It sat in my shop for a long time before I hooked it all up. Not the easiest lathe to set up due to having to mount the drive pulleys to the ceiling. I wouldn't want that crashing down on you while you work. Certainly not the most modern one I've operated and I'd love to have a more modern one, but the price was right. It certainly comes in handy for the work I do. The biggest thing I've turned were the 85# front brake drums for the B73 to open up the pilot holes. Here's a few pics of it. 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518094 Share on other sites More sharing options...
mowerman Posted December 12, 2022 Share Posted December 12, 2022 badass bud...i was told years ago by an old timer buddy of mine,,,,,they had advanced lathes invented,,,way before they had anything to use them on.lol....i believe that..bob Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518101 Share on other sites More sharing options...
Mark T Posted December 12, 2022 Share Posted December 12, 2022 I'm curious what powered that when it was closer to new. I've seen pictures of facilities with overhead shafts powering several things it looked like ? 106 years old....wow 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518104 Share on other sites More sharing options...
mattb73lt Posted December 12, 2022 Author Share Posted December 12, 2022 9 minutes ago, Mark T said: I'm curious what powered that when it was closer to new. I've seen pictures of facilities with overhead shafts powering several things it looked like ? 106 years old....wow I've wondered that too, thinking of that time period. Could've been steam, gas, water or electric. I was in a mill once up near Cooperstown, NY. It was a wood shop that was powered by a 20' wide water wheel. When they opened the sluice gates, the waterwheel would fill and start to turn. The whole mill was set up with line shafts and flat belts. You'd pull individual levers near each machine to activate them. Once the water wheel came up to speed the whole building came alive. it was really amazing to witness. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518107 Share on other sites More sharing options...
Popular Post mattb73lt Posted December 12, 2022 Author Popular Post Share Posted December 12, 2022 IMG_2099.m4v This is the lathe running with one of the brake drums on it. It required a 3" spacer under the headstock for clearance. That's why the side cover is open for the lead screw drive. It just fit and truing up the drum before I turned it wasn't easy due to it's weight. The white handgrip above the drum is the clutch lever for starting and stopping the lathe. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518109 Share on other sites More sharing options...
Mark T Posted December 12, 2022 Share Posted December 12, 2022 It amazes me some of the things they had back then. I've often wondered how they ever made the first ones. ( like how would you true something without a lathe) can you picture Louis Clark make'n something for an Autocar with that technology. Thanks for posting. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518111 Share on other sites More sharing options...
doubleclutchinweasel Posted December 13, 2022 Share Posted December 13, 2022 They ran those off overhead line shafts. Big flat belt from the shaft to the lathe. To reverse it, you’d twist the belt. Have run many of these converted to electric motor. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518115 Share on other sites More sharing options...
70mackMB Posted December 13, 2022 Share Posted December 13, 2022 (edited) Taking about your lathe. lf you are ever near Windsor VT this is a must stop and see. On the VT end of the longest two span covered bridge in New England. https://americanprecision.org .....Hippy Edited December 13, 2022 by 70mackMB 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/54/#findComment-518121 Share on other sites More sharing options...
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