Maddog13407 Posted November 8, 2019 Share Posted November 8, 2019 1975 end707 . diesel and no I don't wanna hear 707 is a gas job. been runnin this engine in my B since 2007, no issues. on the way to Macktoberfest I blew both belts(some of you know) ended up getting a belt back on but after driving home I notice the balancer is wobbling. never noticed this before. are all balancers the same? like 673 711, 237 300? or do I need specific? and should I look further?? is this thing on its way out? bearings?? and again is a end707. its a 711 with maxidyne head gaskets and fire rings. I dunno what the specific purpose of this engine was but I can tell you it likes to run 1100-1800 and hates anything over that Quote Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/ Share on other sites More sharing options...
h67st Posted November 8, 2019 Share Posted November 8, 2019 When you say wobbling, is it moving in and out like thrust bearings are bad? Quote Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435468 Share on other sites More sharing options...
j hancock Posted November 8, 2019 Share Posted November 8, 2019 Think you will need to stay with a 673 or 711 style balancer. Is the crank bolt tight? New noises or vibration? Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435478 Share on other sites More sharing options...
Vladislav Posted November 8, 2019 Share Posted November 8, 2019 With that wobble I would be worrieing of the front end of the crank get worn. Met such issue on a car's engine and had to swap the shaft. Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435484 Share on other sites More sharing options...
Maddog13407 Posted November 9, 2019 Author Share Posted November 9, 2019 gotta tear into it sunday. if you look at it, you can see a wobble like 1/2 inch like something is loose. never thought about thrust washers. this has always been a tight motor.only way thrust washers usually come loose is if someone slams a pilot shaft in hard while putting a tranny in. I have had a few 673's that I found the thrust washers in the bottom of the pan. put new ones in and it still ran like a top. this one has be a little puzzled. never paid attention til both belts came off. now that they are back on I stare at the balancer and see the wobble. Quote Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435514 Share on other sites More sharing options...
Maddog13407 Posted November 9, 2019 Author Share Posted November 9, 2019 no weird noises or shaked other than normal, I have never seen a B61 that didn't shake and rattle. this motor was done in the late 80's and used very little in a dump truck. it sat. I put it in my B in early 2000's . it was always a stout motor ad very clean and tight. other than a head gasket I haven't done anything to it. I did pry against the balancer a little while putting the belt on(some idiot when they built the truck, me forgot to put the spacer plates back in radiator crossmember so there was no room for the belt. I had to loosen crossmember up and pryed it out against the balancer to get belt it. im wondering if I could have bent the balancer?? the hub in the middle of the balancer is pretty think so im thinking not. I have a few711's laying around, thinkin of just swapping the balancer and see what it looks like. btw a balancer for a 711 is NLA from Mack. Quote Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435515 Share on other sites More sharing options...
h67st Posted November 10, 2019 Share Posted November 10, 2019 22 hours ago, Maddog13407 said: no weird noises or shaked other than normal, I have never seen a B61 that didn't shake and rattle. this motor was done in the late 80's and used very little in a dump truck. it sat. I put it in my B in early 2000's . it was always a stout motor ad very clean and tight. other than a head gasket I haven't done anything to it. I did pry against the balancer a little while putting the belt on(some idiot when they built the truck, me forgot to put the spacer plates back in radiator crossmember so there was no room for the belt. I had to loosen crossmember up and pryed it out against the balancer to get belt it. im wondering if I could have bent the balancer?? the hub in the middle of the balancer is pretty think so im thinking not. I have a few711's laying around, thinkin of just swapping the balancer and see what it looks like. btw a balancer for a 711 is NLA from Mack. You mean NLA like 99% of parts for these old trucks? The part numbers I give them for my truck don't even show up on the Mack parts system any more. Quote Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435557 Share on other sites More sharing options...
Maddog13407 Posted November 10, 2019 Author Share Posted November 10, 2019 got good guy at cook brothers that say nla... Quote Link to comment https://www.bigmacktrucks.com/topic/59747-end707-front-balancer/#findComment-435581 Share on other sites More sharing options...
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