nedly05 Posted November 11, 2012 Share Posted November 11, 2012 Hello BMT,I've been lurking here for a while without posting, but I feel the need to benefit from the wealth of knowledge on this board. I'm a 3rd generation "dirt worker" in the Adirondack Mountains of NY. We aren't a big outfit by any means, with 3-6 employees depending on work load. We have an '05 CV713 granite and I just picked up a '74 RD685 (I'm a big fan of mechanical things!) from Mass for a second truck. I didn't have time to go look at it, so I settled for a bunch of pictures. It is a solid older truck, but I must admit I have a little buyers remorse. * The double frame behind the cab is separated and has split in a couple spots. One has been repaired, one has not. I know its just a matter of time before it splits again. So how big of a deal is it to replace the rails from the cab back? In theory it should be like a stretch job, just replacing the rails to the same length they were. I have a local guy that will do it this winter, he gets the rails from PG Adams. WHat can i expect to pay, are there any hidden challenges or secrets that go along with this job?*Secondly, it was supposed to have a Jake but it does not. I'm way too used to having a jake on a tandem to not have it, especially with just having a 6 speed. (2 sticks is interesting lol) It is a 300 HP engine i believe a 676. Is it a big expensive job to add a jake? Would it be more cost effective to add an exhaust brake? I know the kit is a lot cheaper, but from the reading I've done, the max exhaust psi on the 676 is around 35psi and the exhaust brake creates around 50psi, and works better with higher RPM motors, not so well with low RPM macks.So I'm looking for a cost effective solution to this problem. I've already invested too much in this truck which makes it worse to need to spend more on it. Obviously I have to fix the frame, so the jake will be back burner and I'll just have to deal with it for a while. It's not going to be run every day, more of a reserve truck that stays in town. I need it to make me money, but most importantly I need and want it to be safe. I went against my rule of always going to look at something before you buy it, and it bit me in the butt, so all I can do now is make the best of it.Thanks for any and all input! Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/ Share on other sites More sharing options...
masterwelder Posted November 11, 2012 Share Posted November 11, 2012 Hey Nedly, welcome. I've seen and followed you posts over on HEF, I'm masterwelder over there. Anyway I've streched a few trucks over the years but usually have seen fatigued frames completly replaced.There was a medium sized milk hauler and garage here (still here but have changed hands and haul fuel now) and I can remember them replacing the entire rails. Once fatigued your just hooking good to bad and chance the same thing hapening.I'm now expert on the jake or engine brake but I'm sure there must be lots of used out there reasonbly priced once you get to it.Always good to look first, but I also have bought sight on seen. The conforting thing is you got good stock to work with.I know you like to take pics, got any of the old girl to share?? Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145561 Share on other sites More sharing options...
theakerstwo Posted November 12, 2012 Share Posted November 12, 2012 Check with Phil Dirt here on the forum for jake brakes or any engine parts for your engine. glenn Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145574 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 Thanks for the quick replays guys! Here are a few pics. I will take more as time goes by. What could I expect to pay to replace the entire frame? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145577 Share on other sites More sharing options...
Superdog Posted November 12, 2012 Share Posted November 12, 2012 hate to tell you this,but that's not a 300 hp engine.That's a 237 Maxidyne.clean looking old truck,though. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145583 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 Thanks super dog, what gives it away? maybe I should just look for a 300 with a jake and swap it in?? Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145584 Share on other sites More sharing options...
umodelnut Posted November 12, 2012 Share Posted November 12, 2012 Yup, thats a 237. ENDT 675. You can tell because it doesnt have the big aftercooler thing on the top of the motor. The serial number of the truck also tells you what it had for a motor from the factory. 85 in the serial number meant it had a factory 237. Looks like a remanufactured too from that gray engine paint. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145589 Share on other sites More sharing options...
Superdog Posted November 12, 2012 Share Posted November 12, 2012 Thanks super dog, what gives it away? maybe I should just look for a 300 with a jake and swap it in??if it was a 676,it would have the tip turbine fan and side mounted aftercooler Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145590 Share on other sites More sharing options...
Superdog Posted November 12, 2012 Share Posted November 12, 2012 do a google search for TecBrake,I tried to post a link but couldn't get it to work.They took over Jacobs older line of engine brakes and have a kit for your engine.If it's a good runner,leave it in,nothing wrong with a 237. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145595 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 It runs well, is there any safe way to get more power out of it? Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145599 Share on other sites More sharing options...
thomastractorsvc Posted November 12, 2012 Share Posted November 12, 2012 Thats a nice looking older truck, since its from the north east no rust thats a bonus. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145602 Share on other sites More sharing options...
umodelnut Posted November 12, 2012 Share Posted November 12, 2012 Do you say your from the Adirondack Mountains? If so where are you from? Im from Glenfield. Little town in Lewis County, by Lowville. Dont know if youve ever heard of it. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145604 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 I was just up that way last weekend Vinny! I saw an old paverite mack at Nikitich's and thought of you Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145612 Share on other sites More sharing options...
umodelnut Posted November 12, 2012 Share Posted November 12, 2012 I was just up that way last weekend Vinny! I saw an old paverite mack at Nikitich's and thought of youWait a sec, do I know you? I see that old Paverite truck hiding back there. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145620 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 I don't think you know me. My buddy has a camp in Harrisburgh and a few of us go up hunting for a few days every year. We always go over to Andys and look around, saw the paverite truck back there on the way back to town. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145623 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 I found an E6 300 with a jake for 4 grand. The tec brake kit is almost half of that. Would it bolt right in or need modification? Maybe they would take my motor in trade or something? Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145627 Share on other sites More sharing options...
umodelnut Posted November 12, 2012 Share Posted November 12, 2012 Do you know me? Or Doug Fetterly up in Harrisville? Hes got a RD just like you. I think its a 74'. It was an old Paverite truck too. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145629 Share on other sites More sharing options...
Superdog Posted November 12, 2012 Share Posted November 12, 2012 I found an E6 300 with a jake for 4 grand. The tec brake kit is almost half of that. Would it bolt right in or need modification? Maybe they would take my motor in trade or something?The trouble with that would be fitting the ATTAC in front of your radiator.I don't know how that would work on a steel front end like yours. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145630 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 The trouble with that would be fitting the ATTAC in front of your radiator.I don't know how that would work on a steel front end like yours.If it aint broke don't fix it right? Just need to get a jake on it! More importantly get the frame fixed right and make some money! Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145632 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 Do you know me? Or Doug Fetterly up in Harrisville? Hes got a RD just like you. I think its a 74'. It was an old Paverite truck too.I don't really know anyone up there. I know a few people from Clayton but thats it. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145633 Share on other sites More sharing options...
umodelnut Posted November 12, 2012 Share Posted November 12, 2012 I don't really know anyone up there. I know a few people from Clayton but thats it.Wait, your probobly going to think Im done Im sorry, LOL. You said that Paverite truck made you think of me? Im confused sorry. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145637 Share on other sites More sharing options...
David Posted November 12, 2012 Share Posted November 12, 2012 The trouble with that would be fitting the ATTAC in front of your radiator.I don't know how that would work on a steel front end like yours.It's been done, but it would be expensive. You may also need to change the front motor mount. That could also mean changing the crossmember and spring hangers. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145667 Share on other sites More sharing options...
Superdog Posted November 12, 2012 Share Posted November 12, 2012 It's been done, but it would be expensive. You may also need to change the front motor mount. That could also mean changing the crossmember and spring hangers.kinda what I was thinking,it would take alot of modifying.Be better off finding a ENDT676. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145672 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 kinda what I was thinking,it would take alot of modifying.Be better off finding a ENDT676.Thanks, I don't want to do a lot of modifying, I'll keep an eye open for a 676. Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145723 Share on other sites More sharing options...
nedly05 Posted November 12, 2012 Author Share Posted November 12, 2012 Wait, your probobly going to think Im done Im sorry, LOL. You said that Paverite truck made you think of me? Im confused sorry.You have posted pics of paverite trucks in the past thats all. Don't over think it bud LOL! Quote Link to comment https://www.bigmacktrucks.com/topic/28289-1974-rd685-dump-please-help-with-frame-and-jake-issues/#findComment-145724 Share on other sites More sharing options...
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