Popular Post MACKTRUCKS4 Posted October 16, 2014 Popular Post Share Posted October 16, 2014 I picked up a 1964 B755, I need information on the V8 864. I don't know much about the early V8's. Are the 864, 865, and the 866 parts interchangeable? What year did they run? I was told they make a engine brake for these, Is this true? God I love the Mack V-8's !!!!!! 5 Quote Live every day like it's your last, because one of these days, it will be. Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted October 16, 2014 Share Posted October 16, 2014 Only parts that fit that engine are 864 parts.All are obsolete and tough to get...Sweet B though Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted October 16, 2014 Share Posted October 16, 2014 how come that truck look so familiar?? must be a half dozen B75 series painted just like that. think oldmcks.com has one and there was another one for sale not too long ago with a cummins Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted October 16, 2014 Share Posted October 16, 2014 That's the one Dennis had. Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted October 16, 2014 Share Posted October 16, 2014 so that's the one that came from the west coast and was in a storage building for years? Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted October 16, 2014 Share Posted October 16, 2014 Not sure,pretty sure there's some Youtube vids from the previous owners.Wonder how much he got it for? Quote Link to comment Share on other sites More sharing options...
Superdog Posted October 16, 2014 Share Posted October 16, 2014 I know it sold cheap out west,guy was only asking 3 or 3500,I missed it by a day.When I talked to the guy,it hadn't been started for many years,and they were going to try starting it and he said he'd call me back,which he did to tell me it was sold.As far as your questions,the 864 ran from '63 or '64 to '70 when the 865 started. I've never seen a 864 with a Jake,but the made a Dynatard for the 865 and 866,might have made Jakes too,but only seen Dynatards. The pump was different,they might share a few parts,but mostly only shared the same displacement,there were improvements to the block with the 865 and 866.Very nice truck,good to see you end up with it and not have it end up overseas.With that wheelbase a Mercury bunk sure would set it off. 1 Quote Link to comment Share on other sites More sharing options...
39 Baby Mack Posted October 16, 2014 Share Posted October 16, 2014 Mike,Some of the later 864's used the American Bosch APE multiple plunger pumps like the 865's and 866's.Much better pump than the PSJ's and PSM'sWe had a naturally aspirated 864 with that pump that was rated at 270 H.P. rather than the normal 255 H.P. rating.That motor is in the "F" model Mike Yarnall has.Ron 1 Quote Link to comment Share on other sites More sharing options...
Superdog Posted October 16, 2014 Share Posted October 16, 2014 thats good to know,Ron,I'd never seen one with the other pump. 1 Quote Link to comment Share on other sites More sharing options...
Freightrain Posted October 16, 2014 Share Posted October 16, 2014 I'm thinking Kevin Black from ATHS was there when the guy fired it up for the first time? Seems I recall him posting the vid on ATHS forums years ago. Maybe he just found it and posted it? Kinda fuzzy with the details.Looks like a pretty decent truck. Would love to have it, but no place to park it and the old V8 would be a kink if anything happen to it when I travel alot. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
Superdog Posted October 16, 2014 Share Posted October 16, 2014 He was,Larry. Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted October 16, 2014 Share Posted October 16, 2014 Pretty sure this truck sold for 4 times that price!Looks to be a solid one though... Quote Link to comment Share on other sites More sharing options...
MACKTRUCKS4 Posted October 16, 2014 Author Share Posted October 16, 2014 That's the same truck from out west in WA. A friend got it from Dennis and I got it for a "song and a dance". I believe Dennis got it around the beginning of the year. Truck runs and drive good. He is the one that told me they made a Jake for it, but I wasn't sure. Time to look for spare motors for parts. He believe only 456 B755's were made. I wonder how many are still around. This one is naturally aspirated but Dennis said they came also with a single turbo and a twin turbo also. Any truth to that? 1 Quote Live every day like it's your last, because one of these days, it will be. Link to comment Share on other sites More sharing options...
Superdog Posted October 16, 2014 Share Posted October 16, 2014 456 is correct on the build # . I have a twin turbo one in the barn,there are a very few of those around,Mackdaddy has the finest restored example in my book,but I've never seen or heard of a single turbo 864, and I'm certain they were never offered in the B models,only the natural aspirated ones. Otherwise by Mack's system,there would have been a B7553( extra 5 for V8,3 for turbocharged). 1 Quote Link to comment Share on other sites More sharing options...
39 Baby Mack Posted October 16, 2014 Share Posted October 16, 2014 I'm with Mike,I don't think they ever made a single turbo 864, only twin turbo's.We had one in an "F" model.F-719T 1093 built in 1967.You can better believe this one didn't have an APE pump on it.All the ENDT864's had PSJ or PSM pumps on them, they're the only ones that would fit with where the turbo's were mounted.Ron 1 Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted October 16, 2014 Share Posted October 16, 2014 As for as I can remember the 864 went from no turbo to a twin turbo. 1 Quote glenn akers Link to comment Share on other sites More sharing options...
mackdaddy Posted October 17, 2014 Share Posted October 17, 2014 I have 3 of the B755's all with the L cab. I have never seen a B7553 but there must of been a few. And yes they would have been a twin turbo. Most interesting to me is that they built the 864 which should have been considered an experimental engine, through 1972! Begs to ask why? and who for? Both the 865 and 866 were in production then! I attached a word doc on the production and years.Mack V8 Diesel Engines.doc 2 Quote Link to comment Share on other sites More sharing options...
Superdog Posted October 17, 2014 Share Posted October 17, 2014 Wonder if they were continued for export,,because its only showing the F719 and R719 being built to 1970,and the F715,U615 and R615 up til '71.Hard to tell. 1 Quote Link to comment Share on other sites More sharing options...
Mack man 1973 Posted October 18, 2014 Share Posted October 18, 2014 So my question is are 865&866 parts interchangeable ? Quote Link to comment Share on other sites More sharing options...
terry Posted October 18, 2014 Share Posted October 18, 2014 So my question is are 865&866 parts interchangeable ?Doesn't post #2 answer your question? Quote Link to comment Share on other sites More sharing options...
Mack man 1973 Posted October 18, 2014 Share Posted October 18, 2014 Sorry I see about the 864 parts only being interchangeable with 864 but I didn't see but didn't see an explanation on the endt 865 and endt 866 parts interchanging Quote Link to comment Share on other sites More sharing options...
Superdog Posted October 18, 2014 Share Posted October 18, 2014 alot of 865 and 866 stuff will interchange,I think just the pump,and turbo were the main differences. 1 Quote Link to comment Share on other sites More sharing options...
Mack man 1973 Posted October 18, 2014 Share Posted October 18, 2014 Thanks, I wondered what made the horsepower differance if it was just the pump & turbo or displacement differance. These engines were before my time and is hard to find folks that even know about them anymore thanks again Quote Link to comment Share on other sites More sharing options...
Superdog Posted October 18, 2014 Share Posted October 18, 2014 displacement was the same,it was how they were set up,the 865 was a Maxidyne engine,engineered to be used with a 5 or 6 speed,with an operating range of 1200 to 2400 rpm ,they had 2 versions I know of for sure,most common was the 325 hp one and there was a derated 285 hp one,alsoThe 866 was designed as a Thermodyne engine,for use with transmissions having 10 or more gears,mostly paired withe the TRDL1070 Mack 10 speed and the TRTXL1070 12 speed Mack.Operating range was 1500 to 2300 rpm as I recall . Also offered in at least 2 versions I can remember,a 350 hp and most common was the 375 hp one. 2 Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted October 18, 2014 Share Posted October 18, 2014 Mike said it well (as I was typing the short version) 1 Quote Link to comment Share on other sites More sharing options...
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