Bigdogtrucker Posted March 18, 2012 Author Share Posted March 18, 2012 What does main direct in 4th meen? Quote Link to comment Share on other sites More sharing options...
other dog Posted March 18, 2012 Share Posted March 18, 2012 What does main direct in 4th meen?It just means that the main trans. is an overdrive transmission. 4th. gear is direct drive, 5th. is overdrive. In the compound you have lo-lo, lo split (underdrive), direct, and high split (overdrive).When you're in 4th. in the main and direct in the compound, that's direct drive. That's why you don't use the compound in 5th. main, you shift from 4th. hi to 5th. hi. 5th. in the main to lo split or direct in the compound would actually be downshifting.4th. main and hi split in the compound is almost the same ratio as 5th. main and direct in the compound, 5th. main to lo split would be a downshift. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted March 18, 2012 Author Share Posted March 18, 2012 Thanks very much,good info to know.So,it's a double OD? Quote Link to comment Share on other sites More sharing options...
other dog Posted March 18, 2012 Share Posted March 18, 2012 Thanks very much,good info to know.So,it's a double OD?that's right, you've got OD in the main trans. and the compound. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted March 18, 2012 Author Share Posted March 18, 2012 that's right, you've got OD in the main trans. and the compound.Sweet,now just to find the rear end ratio! Quote Link to comment Share on other sites More sharing options...
other dog Posted March 18, 2012 Share Posted March 18, 2012 Sweet,now just to find the rear end ratio!that should be stamped on the rear end housing on a flat spot to the left of the the pinion when facing towards the rear. I had to scrape mine with my pocket knife, then scrape it some more before I could see it. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Mike Blais Posted March 18, 2012 Share Posted March 18, 2012 Nice tractor. The cast radiator is something you don't see too often. I thought the B-73 and B-75 were Cummins powered? Quote Link to comment Share on other sites More sharing options...
Rob Posted March 18, 2012 Share Posted March 18, 2012 Nice tractor. The cast radiator is something you don't see too often. I thought the B-73 and B-75 were Cummins powered?The B73's were Cummins powered. The B75's were Mack powered by an inline engine. The B755's were Mack V8 powered.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Brian Blaylock Posted March 18, 2012 Share Posted March 18, 2012 The B-753 was also inline Mack with turbo charger the B-77 was also cummins powered Quote Link to comment Share on other sites More sharing options...
Mike Posted March 18, 2012 Share Posted March 18, 2012 Looks like someone kept the inside looking good. Maybe some 320 grit on the body and repaint with same color to get the shine back and she would be ready for anything ya wanted to do. Glad you saved another Mack.mike Quote Link to comment Share on other sites More sharing options...
Shawn Barrett Posted March 18, 2012 Share Posted March 18, 2012 Looks like someone kept the inside looking good. Maybe some 320 grit on the body and repaint with same color to get the shine back and she would be ready for anything ya wanted to do. Glad you saved another Mack.mikeHell no just take a buffer and rubbing compound to that baby.....It'll come back trust me. Quote Link to comment Share on other sites More sharing options...
Mike Blais Posted March 18, 2012 Share Posted March 18, 2012 Found another one, this could be a twin to yours. Quote Link to comment Share on other sites More sharing options...
phildirt Posted March 18, 2012 Share Posted March 18, 2012 Here is B75T1989 after a frame stretch and Mack camelback tandems added-- 1 Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted March 18, 2012 Author Share Posted March 18, 2012 Those are some sharp looking trucks! Quote Link to comment Share on other sites More sharing options...
John Woge Posted March 18, 2012 Share Posted March 18, 2012 Here's B-75 T 1927.....originaly a single axle. Someone added the Neway air tag later in its life.John Quote Link to comment Share on other sites More sharing options...
Shawn Barrett Posted March 19, 2012 Share Posted March 19, 2012 Damn good lookin trucks Quote Link to comment Share on other sites More sharing options...
PalContCo Posted March 20, 2012 Share Posted March 20, 2012 !956 B70 (gas) s/a. This tractor was our prime mover and worked every day until the late '70's. 2 more photos in next post.Mike P Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted March 20, 2012 Author Share Posted March 20, 2012 !956 B70 (gas) s/a. This tractor was our prime mover and worked every day until the late '70's. 2 more photos in next post.Mike PGREAT pics,the world was a much better place when those were snapped... Quote Link to comment Share on other sites More sharing options...
b61fred Posted March 21, 2012 Share Posted March 21, 2012 One thing to take into concideration on the number of single axle b75 is, quite a few of them were equiped with a tag axle making them look like a tandem, I have noticed a lot them in old pictures that had tag axles installed for over the road work. I have a single axle b733, and remaints of a b79. the 733 is a cummins powered with a turbo and the b79 should have a v8 cummins engine, the v8 before the 555 and 903. I am not for sure the cid of the original engine but it is long gone. the first two years of production of the b7x's production the trucks have the smaller b61 style radiator grille also something to look for,Morgan Quote 15 gears...no waiting! Link to comment Share on other sites More sharing options...
Olivetroad Posted March 21, 2012 Share Posted March 21, 2012 One thing to take into concideration on the number of single axle b75 is, quite a few of them were equiped with a tag axle making them look like a tandem, I have noticed a lot them in old pictures that had tag axles installed for over the road work. I have a single axle b733, and remaints of a b79. the 733 is a cummins powered with a turbo and the b79 should have a v8 cummins engine, the v8 before the 555 and 903. I am not for sure the cid of the original engine but it is long gone. the first two years of production of the b7x's production the trucks have the smaller b61 style radiator grille also something to look for,MorganI have had trucks with the triple nickle 555, but I have never seen the older V-8. I wonder what model that was? Quote Link to comment Share on other sites More sharing options...
b61fred Posted March 21, 2012 Share Posted March 21, 2012 The engine is referred to as a 350 cummins v8, I have seen a few pictures of these but, most are not turbocharged, they were made to pull doubles on the new york thru-way, backed with a quadraplex. all 10 were made for the same company Mcbride in new york state.Morgan Quote 15 gears...no waiting! Link to comment Share on other sites More sharing options...
Olivetroad Posted March 21, 2012 Share Posted March 21, 2012 That is a rare bird for sure! Quote Link to comment Share on other sites More sharing options...
Brocky Posted March 25, 2012 Share Posted March 25, 2012 My 358 Brockway has a 504 in it and I have a 555 engine in the shed.. According to the Cummins repair manual the only difference is in the crank, which adds a half inch in the stroke, and the pump. Cummins also made a V-6 of this engine at 376 cci(??) which I did not know until I bought the shop manual.Brocky Quote Brocky Link to comment Share on other sites More sharing options...
Timothy Maikshilo Posted March 25, 2012 Share Posted March 25, 2012 !956 B70 (gas) s/a. This tractor was our prime mover and worked every day until the late '70's. 2 more photos in next post.Mike PVery nice photo's for sure. Where was your yard? Quote Link to comment Share on other sites More sharing options...
David Posted March 25, 2012 Share Posted March 25, 2012 Look at the deck on that lowboy and you can imagine how much work that Mack was doing. Quote Link to comment Share on other sites More sharing options...
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