1961H67 Posted December 13, 2022 Share Posted December 13, 2022 Fortunately I was able to check out that lathe in person,,, I was impressed! I love the overhead pulley system, Just think of how environmentally friendly a complete machine shop would be running off a stream and water wheel,,, But I’m sure some endangered fish would be harmed by the water wheel! Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518124 Share on other sites More sharing options...
mattb73lt Posted December 13, 2022 Author Share Posted December 13, 2022 1 hour ago, doubleclutchinweasel said: 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. Yes, if you look at the video, you’ll see a large pulley in the center of the line shaft with no belt on it. That would be the one for the belt with the twist for reverse rotation. The clutch lever pushes in both directions to engage one or the other drive pulley off the same shaft. The way this is set up I can only drive in one direction. You need a longer run to make that twist and I don’t have the space to do so. Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518130 Share on other sites More sharing options...
mattb73lt Posted December 13, 2022 Author Share Posted December 13, 2022 Here’s another quick video of it running just after I got it hooked up several years ago. It’s in really good shape with little wear on the ways. It still pretty tight, overall. 7075352D-39FA-4BC3-A8E1-D5A039AC6163.MOV 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518135 Share on other sites More sharing options...
Red Horse Posted December 13, 2022 Share Posted December 13, 2022 4 hours ago, mattb73lt said: 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. Well this just adds to the "big picture" on your restoration. Lot of comment on this so guys if you have never been to Greenfield Village in Dearborn Mich. you should take the trip. I t was set up by Henry Ford and is a tribute to what this country was at the turn of the century. All kinds of shops recreated and when you go in them you see all the old machinery-like Matt's lathe- Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518140 Share on other sites More sharing options...
doubleclutchinweasel Posted December 20, 2022 Share Posted December 20, 2022 Waiting...waiting... 1 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/55/#findComment-518738 Share on other sites More sharing options...
mattb73lt Posted December 20, 2022 Author Share Posted December 20, 2022 1 hour ago, doubleclutchinweasel said: Waiting...waiting... Yeah, so am I. Nothing yet from the machine shop. I did harvest a lot of parts out of the "Loaner" 220, though. Lots of Cummins parts laying around the shop. Found a 6" pipe wrench laying in the pan??? I wonder how long that's been in there? 3 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518741 Share on other sites More sharing options...
Popular Post Mark T Posted December 20, 2022 Popular Post Share Posted December 20, 2022 Someone threw the proverbial monkey wrench in that one. 1 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518743 Share on other sites More sharing options...
mattb73lt Posted December 21, 2022 Author Share Posted December 21, 2022 I think the "Loaner" runs hot!?!?!? Set fire to my mixture of ATF and Marvel Mystery oil heating up the cylinders while trying to un-stick the engine after sitting outside forever. After letting it sit for a few days it popped free allowing me to disassemble more of it. IMG_4308.m4v 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518750 Share on other sites More sharing options...
1961H67 Posted December 21, 2022 Share Posted December 21, 2022 Lol ! That is the only way we’re going to be able to get a older Cummins started this weekend! Great Video! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518756 Share on other sites More sharing options...
mowerman Posted December 21, 2022 Share Posted December 21, 2022 Lol ya baby,,,, let’s giderdone… Bob Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-518761 Share on other sites More sharing options...
Popular Post mattb73lt Posted December 27, 2022 Author Popular Post Share Posted December 27, 2022 Still plugging away on getting things apart and inspected. Talked to the machine shop last week and the block should be heading into the hot tank this week. I need to head there and swap some parts out from the donor. I did de-sleeve the donor. While slimy and crusty, the block still seems to be in better over all shape. The lower bores are pit free and look good. There is a light frosting of surface rust on some areas, but it cleans right off. I did place an order for a sleeve and piston set from Mahoney & Son, so we'll see what comes of that. I have a pretty good list of part numbers to acquire for the rebuild, both current and superseded numbers. I was able to borrow a heavy duty engine rotisserie and that makes life soooo much easier working on this engine. Spent a day fabricating a mounting plate for it as my friend didn't have one that fit a 220 directly. I think once the machine work is done and all the required parts are collected, it should assemble pretty quickly and be back on the road by spring. 7 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519146 Share on other sites More sharing options...
Popular Post Mark T Posted December 27, 2022 Popular Post Share Posted December 27, 2022 Engine stand makes life so much easier. Not many guys have that luxury (lol) You're going to have that engine right up to the level of the rest of the truck. 5 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519147 Share on other sites More sharing options...
The Rubber Duck 006 Posted December 27, 2022 Share Posted December 27, 2022 My Grandpa had to build an Engine Stand from Scratch to hold the engine from his Brockway. It rotated the engine 360 degrees. He had his friend that owned the local Junk yard called Army's here in Lima,Ohio bring over his Engine picker machine to git the motor out. He had to replace the camshaft I believe is what he told me. After he died I found that same stand sitting in the weeds by his property line and it was still in use able shape. But wouldn't you know that Someone had more energy than me I guess and stole it. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519156 Share on other sites More sharing options...
1961H67 Posted December 28, 2022 Share Posted December 28, 2022 Very nice adopter you made, that will make a smooth assembly. Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519172 Share on other sites More sharing options...
carlotpilot Posted January 2, 2023 Share Posted January 2, 2023 just caught up with all this since back in the summer. quite a story` glad to hear no real bad damage to the block & crank looks like you got it well under control though . double check all specs which i`m sure you will before you put it all back together 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519538 Share on other sites More sharing options...
mowerman Posted January 2, 2023 Share Posted January 2, 2023 Nothing like the right equipment… last time I had the transmission out of the DM I used a pallet Jack and a couple of boards it came right out and went right back In slicker than I would have thought with this chicken shit setup I will do the same thing with it when I switch transmissions … Bob 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519542 Share on other sites More sharing options...
Popular Post mattb73lt Posted January 3, 2023 Author Popular Post Share Posted January 3, 2023 Block #2 is ready for the machine shop. I think this one will be the candidate for the rebuild. It's newer and has less issues than the other one. I'll probably use the heads off mine and combine a lot of both engines into the new one. I cleaned the exterior of this one with a wire wheel on a 4" angle grinder after scraping all the crud off it. The only issues I've found was in the bell housing area. Two broken bolts and one of the dowel pins had walked it's way out. 6 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519887 Share on other sites More sharing options...
Mark T Posted January 3, 2023 Share Posted January 3, 2023 Best to indicate the bell housing you put back on it. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519898 Share on other sites More sharing options...
mattb73lt Posted January 3, 2023 Author Share Posted January 3, 2023 6 minutes ago, Mark T said: Best to indicate the bell housing you put back on it. Oh, I will go through that drill again. Both the bell housing and flywheel!! Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519901 Share on other sites More sharing options...
Mark T Posted January 3, 2023 Share Posted January 3, 2023 Those old ones if needed you can mill a few thousands off the main caps if it was to be line bored if you're swapping crankshafts around. (lol) and I'm a firm believer in the old wive's tale about only cutting one throw or journal . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-519903 Share on other sites More sharing options...
Popular Post mattb73lt Posted January 12, 2023 Author Popular Post Share Posted January 12, 2023 I've never seen heads so plugged up with carbon!! Or how did this engine even run?? Trying to keep these heads together with the donor block as they are matching with the 1964 dates. They went in the hot tank this morning along with block. Disassembled and cleaned them out beforehand. They'll need new valves and springs to start. We'll see about the guides and seats as we dig into them. I had a valve head literally drop off the stem as I tapped it out. Thank God no one ever tried to start it, as it would have self destructed in seconds. If it could even start!! The engine came out of a truck that was last used as a yard truck before it was scrapped. So it never really got hot or run hard and I think that was the reason for so much coking. The Piston/Liner kit and gaskets are arriving tomorrow. Holding off on the bearings until we're certain which crank/ block were using. It was a huge relief to find out everything for a NH220 can still be had, with a little searching. Ralph Mahoney & Sons has been a huge help. I think I'm a few weeks away from the reassembly and Rocky is cued to help in that area. And back on track to getting this huge project done and back on the road!! 3 1 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-521020 Share on other sites More sharing options...
Freightrain Posted January 13, 2023 Share Posted January 13, 2023 Ugh, nothing but idling is torture on these engines. 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-521139 Share on other sites More sharing options...
mattb73lt Posted January 13, 2023 Author Share Posted January 13, 2023 3 hours ago, Freightrain said: Ugh, nothing but idling is torture on these engines. Yeah, no doubt!! It's last use killed it. Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-521155 Share on other sites More sharing options...
Popular Post mattb73lt Posted January 13, 2023 Author Popular Post Share Posted January 13, 2023 Christmas in January!!! The PAI liner kits and gaskets arrived today!!! Moving forward again, finally. 5 2 Quote Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-521156 Share on other sites More sharing options...
tjc transport Posted January 13, 2023 Share Posted January 13, 2023 5 hours ago, Freightrain said: Ugh, nothing but idling is torture on these engines. even with the new trucks. i was warned not to idle, so whenever i will be at idle for more than 1-2 minutes i kick it up to 900RPM Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/41547-b-73-restoration/page/55/#findComment-521164 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.