Freightrain Posted February 16, 2016 Share Posted February 16, 2016 Ok, going through my highway repair books, my T675 is listed as a 235 hp? At least by that book. I tried looking up the pump number, but I'm thinking it is too old for the book I have as it is not listed. The book seems to start at 1973.Was talking to Tom Gannaway the other night, he called after finding out here that I was putting the same motor in my truck as he. He brought up the 235 hp think and recalled my book saying the same thing. Is this just a differently rated 237? Or just the same thing? Neither of us have any information on the pump as to the HP rating. I think they started doing that later? It seems there are a few flavors of this motor(like others). Not that either of us are concerned, but more just curious.Just looking for thoughts. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/ Share on other sites More sharing options...
j hancock Posted February 16, 2016 Share Posted February 16, 2016 All the factory sales brochures for the 675 that I have indicate 237 HP. Getting into the weeds, the Mack service manual list ENDT-675 and ENDTB-675 at 235 HP. B indicating Mack Dynatard equipped. 2 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324536 Share on other sites More sharing options...
Freightrain Posted February 16, 2016 Author Share Posted February 16, 2016 Ah, so that is what the B is. My book says ENDT(B)675. That clarifies it some. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324546 Share on other sites More sharing options...
b61mack Posted February 16, 2016 Share Posted February 16, 2016 I have a 1974 ENDT 675 that has 235hp on the tag. Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324589 Share on other sites More sharing options...
theakerstwo Posted February 17, 2016 Share Posted February 17, 2016 Larry I remember when the maxidyne came out and it built 235 HP at 2100 and 237 HP at 1200 RPM.The maxidyne works good from 1200 up to around 1600 or 1700 and then starts to go flat till it gets to 2100.It needs a 5 speed to to feel good. 2 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324615 Share on other sites More sharing options...
m16ty Posted February 17, 2016 Share Posted February 17, 2016 From the way you calculate HP, the max HP will always be at max RPM. Max torque will usually be at the lower RPM range.I doubt anybody is going to notice 2 HP either way. Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324619 Share on other sites More sharing options...
theakerstwo Posted February 17, 2016 Share Posted February 17, 2016 What you show have done is told that to the mack engineers in 1965.They did not know that. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324629 Share on other sites More sharing options...
Freightrain Posted February 17, 2016 Author Share Posted February 17, 2016 Here's another question: Clutches. Mine should be just a single disc. They did offer a twin disc behind the V8's back then. Could I, Should I, maybe look into something like that? I'm going to guess it will not fit my current 673 flywheel? Would it fit the 237 wheel I have? I know it would need the tabs around the outside like the 237 wheel has to drive the floating disc. Am I over thinking it and just put another stock 673 clutch in??I was looking at my Highway book and it shows a bunch of different ctutches, depending on the HP rating of motor. Like 4 or 5 variations. I think a couple were pull clutches? Anyway, just wondering. I'll be pulling my clutch off tonight?(if I want to brave some snow when I get home).If I stay with single disc, I will make my own dummy shaft(no splines, just turned to fit ID) to get the disc centered. "IF" I would go twin, I would need to find a real dummy shaft to align the splines. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324680 Share on other sites More sharing options...
terry Posted February 18, 2016 Share Posted February 18, 2016 I think you could use the 673 flywheel on the 675 engine, I ran a quad behind a 675 engine with a single disc clutch for years, but I was the only driver. But when you talk a double disc clutch where a single was you really open up a can of worms! A double disc has a longer input shaft, a deeper bell housing, which also puts the trans mounts farther back. Not to mention you also need a clutch brake with a double disc set up. terry 2 Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324709 Share on other sites More sharing options...
Freightrain Posted February 18, 2016 Author Share Posted February 18, 2016 Good point and that is why I was asking about it. I did get the clutch and flywheel off the old motor tonight. The pilot bearing fell out and was literally junk. I was lucky it lasted this long without problems. I will be getting a new clutch assembly and surfacing the flywheel Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324726 Share on other sites More sharing options...
Maddog13407 Posted February 18, 2016 Share Posted February 18, 2016 yup, double disk clutch has a longer imput shaft and a deeper bell housing. and motor mounts are farther back. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324727 Share on other sites More sharing options...
Freightrain Posted February 18, 2016 Author Share Posted February 18, 2016 So, where would you guys suggest I look to get a clutch for this? Mack? Or Luk? Eaton? I already warned my wallet of the possible clean out.The book states there are a few variations, I wonder if I can get something with a bit more bite to it? Mine is 2" spline. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324759 Share on other sites More sharing options...
thomastractorsvc Posted February 18, 2016 Share Posted February 18, 2016 Can you get it rebuilt and lined locally? Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324770 Share on other sites More sharing options...
Freightrain Posted February 18, 2016 Author Share Posted February 18, 2016 I know we have a place that can put new material on the disc. I think they do brakes also. Don't think they handle rebuilding the plate. It's not rocket science, but after looking at the books and how Mack has all these little gauges to set things I don't want to have to pull the motor to fix something that doesn't work right. I'll pay the money for new.I think I can do the flywheel, if I can get the dimension for the proper height. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324773 Share on other sites More sharing options...
68-f-model Posted February 18, 2016 Share Posted February 18, 2016 not sure on the specifics but would something like this single disk set up work?max torque rating is 2000http://www.fleettruckparts.com/Clutches/Clutch-HD-Lipe-2-for-Engines-Under-475-HP-Clutch HD Lipe 2 for Engines Under 475 HP.Part #:SL-LIPE-2-CPAdditional Info:Spline - 15.5 x 2. Flywheel - Flat. Ceramic 6 PDL 2 PL. Push/Pull - Pull. Plate Load - 3720. Max Torque - 2000. Springs Per Disc - 10. Cover Material - Cast Iron. Center Diameter - 8.25. Stroke Bearing Travel - 0.500" to 0.560". Adapter Ring - Yes.Material:SteelCondition:New AftermarketMade in:USA Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324780 Share on other sites More sharing options...
Freightrain Posted February 18, 2016 Author Share Posted February 18, 2016 Well, that is a PULL clutch. I need a PUSH. Mine is also 15". Not quite as popular as all the new stuff. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324782 Share on other sites More sharing options...
68-f-model Posted February 18, 2016 Share Posted February 18, 2016 Could sent it out to D W clutch and have it rebuilt/upgraded with better friction materials like 6368 did with his b61?http://www.bigmacktrucks.com/index.php?/topic/36425-b61-clutch-adjustment/ Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324784 Share on other sites More sharing options...
Freightrain Posted February 18, 2016 Author Share Posted February 18, 2016 Thanks for the link David. I'll check into it. Just dread to find out what it cost to ship this boat anchor back and forth to MD?Found HRClutch over by Philly, PA. Though they are actually a bit farther away. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324791 Share on other sites More sharing options...
68-f-model Posted February 18, 2016 Share Posted February 18, 2016 Certainly more than a flywheel and manifold from Chicago. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324799 Share on other sites More sharing options...
Freightrain Posted February 18, 2016 Author Share Posted February 18, 2016 LOL!! I was almost going to ask if you were in the mood for a road trip LOL!!!!! Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324809 Share on other sites More sharing options...
68-f-model Posted February 19, 2016 Share Posted February 19, 2016 Only if there is another ice storm 1 Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-324857 Share on other sites More sharing options...
Red Horse Posted February 20, 2016 Share Posted February 20, 2016 Ok guys-always an education here as to how little I know! My "61X" started life as a 60X and then at some point a 711/Duplex was installed. Then a factory reman 237 (had 10,000 on it when it came out of a wreck). No clue as to what clutch is-assuming Duplex was what was with the 711?What do I look for to "iD" clutch?- figure better to get an understanding before I have a quick need to replace. Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-325079 Share on other sites More sharing options...
Freightrain Posted February 21, 2016 Author Share Posted February 21, 2016 Probably the same as I have. 15" single disc, 2" spline. Not really sure how you can tell from looking at the outside? No matter, as I would bet it is readily available no matter what. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-325139 Share on other sites More sharing options...
topo Posted February 21, 2016 Share Posted February 21, 2016 When looking for # 2 clutch parts for a military Mack that has a 1 3/4 input shaft I came across a Mack transmission with a 1 5/8 input shaft it had been bolted up to a 675 . Quote Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-325140 Share on other sites More sharing options...
j hancock Posted February 21, 2016 Share Posted February 21, 2016 Going through some of my sales brochures, CL 28 seems to keep showing up. It is a single plate, dry clutch. Found behind 707, END 711, ENDT673 for example in models such as B70, B75, R609 and R611.It seems like most of the 237 were a double disc clutch to handle the torque of the Maxidyne. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/44029-237-or-235-hp/#findComment-325173 Share on other sites More sharing options...
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