monserandsons Posted January 11, 2014 Share Posted January 11, 2014 hi again, long story short it was a plow truck. the drivers side(double rail) is split between the front shackles. the passenger side is so much better it looks like its from a different truck. im assuming this is from road salt splash. the drivers side rear springs are bulging from rust between the springs. after reading several threads here I believe I can just change the drivers side? maybe its repairable? my father in law passed and the truck belongs to me now. less than a year before his death this engine was either professionally rebuilt or was purchased new? somewhere I have receipts and they are in the ten thousand range, the cab was changed at the same time. what type of engine is it? I used it for ahwhile but was never able to shift it smoothly. its been in the garge the last two years, but I start it about once a month. there was one period when I didn't start it for 4 or 5 months. it starts so well you never here it crankin. turn the key and its instantly runnin, even when its cold.i never saw the split until after I had spent a great deal of time and money. I need a truck this size and will fix it if it can be done reasonably, but after searching I know ican find a nice lookin single axle ford or international for less than ten thousand.tell me what u guys think. the engine doesn't have a single wet spot around any gaskets but the tranny leaks oil, the steering box leasks and the rear end leaks where the drive axle comes in. I have very little big truck experience and don't know if I should fix it or get another truck? the tranny has lever for gear selection and lever for forward, reverse and high forward, I believe. registration says 1974. what exactly do I have here? thanks. 2 Quote Link to comment Share on other sites More sharing options...
r686st Posted January 11, 2014 Share Posted January 11, 2014 I'd say fix the Mack and run it instead of the other brands mentioned. It's a much stronger and better suited for hard work. I basically rebuilt mine which was in very bad shape and I couldn't be happier. It hasn't left me on the side of the road even when the clutch went out. If you care to read what I repaired on mine go to the antique section and search 1991 RD690S. This should give you an idea of how ruff mine was when I bought it and yours doesn't sound as bad as mine even with the frame issues. Quote Link to comment Share on other sites More sharing options...
Enck762 Posted January 11, 2014 Share Posted January 11, 2014 Hi there,i am in otego not far from you. i have run several macks and brockways with similar cracks. I have a guy weld up the crack spray a little hot rod black paint on and go for it. That truck is way overbuilt so a little horizontal crack isnt going to hurt a thing. You re-rail it you have way more invested than truck is worth in my opinion even if you got it for free. I know a welder who will come out and do it....just pm me........Brian I can also tell you where to go to get inspected 1 Quote Link to comment Share on other sites More sharing options...
Superdog Posted January 11, 2014 Share Posted January 11, 2014 Looks like a RD685,237 Maxidyne,with a 6 speed. You won't find a more bullet proof drivetrain. I'm with Brian,weld it and run it. 1 Quote Link to comment Share on other sites More sharing options...
vision386 Posted January 11, 2014 Share Posted January 11, 2014 I also agree with welding the frame,you got a lot more truck right there then could be replaced by something else cheaper,237/6 speed combo is practically bulletproof,they go together like peanut butter and jelly!..............................Mark 1 Quote Mack Truck literate. Computer illiterate. Link to comment Share on other sites More sharing options...
monserandsons Posted January 11, 2014 Author Share Posted January 11, 2014 Thanks guys I feel better now. I had a real hard time getting the rims off I had to use a ports power. I guess now I'll get the front wheels off and prep that area. Where should I go to get the drums,shoes, and s can bushings? If got brand new rubber everywhere. I made my own battery box, am I required to have a lid on it? Thanks again, I won't be shy ask in questions now Quote Link to comment Share on other sites More sharing options...
masterwelder Posted January 11, 2014 Share Posted January 11, 2014 Thanks guys I feel better now. I had a real hard time getting the rims off I had to use a ports power. I guess now I'll get the front wheels off and prep that area. Where should I go to get the drums,shoes, and s can bushings? If got brand new rubber everywhere. I made my own battery box, am I required to have a lid on it? Thanks again, I won't be shy ask in questions now We are in Worcester, just over the hill, and we use Cook Brothers for our parts. Good price and service and they deliver, they should deliver to you to. Not sure about needing a cover on the battery but just for safety sake I would fabricate something. If you decide not to keep it let me know, I'll give it a good home! Quote Link to comment Share on other sites More sharing options...
Jeff M Posted January 12, 2014 Share Posted January 12, 2014 I used it for ahwhile but was never able to shift it smoothly.The secret with that transmission is to take your time shifting between gears as there is at least 900 rpm difference between each gear. And I agree with the others, keep the Mack and fix 'er up! Quote Link to comment Share on other sites More sharing options...
monserandsons Posted January 12, 2014 Author Share Posted January 12, 2014 sounds like it can be fixed, what about those springs? I cant see any cracks but is that something dot would get upset about? Quote Link to comment Share on other sites More sharing options...
Joe Ditchkus Posted January 12, 2014 Share Posted January 12, 2014 I would definitely put a battery box cover on it. DOT will write you up without one.As others said good power combo.Joe D. Quote Link to comment Share on other sites More sharing options...
masterwelder Posted January 12, 2014 Share Posted January 12, 2014 sounds like it can be fixed, what about those springs? I cant see any cracks but is that something dot would get upset about? I wouldn't worry to much about the rust on the springs... first trip on any of the roads in Otsego County will knock it right off!! Quote Link to comment Share on other sites More sharing options...
monserandsons Posted January 12, 2014 Author Share Posted January 12, 2014 (edited) some more picshaving trouble with camera and loading pics what is the approx. value with the brand new rubber and the engine as good as im claiming? Edited January 12, 2014 by monserandsons Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted January 12, 2014 Share Posted January 12, 2014 Idunno guys!That looks more like a 285 or 300 Maxi, doesn't it? 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Superdog Posted January 12, 2014 Share Posted January 12, 2014 heck,that's a ENDT676, 283 hp. I figured being a single axle,it woulda just had 237. Quote Link to comment Share on other sites More sharing options...
vision386 Posted January 12, 2014 Share Posted January 12, 2014 I thought the same thing for the same reason!................Mark Quote Mack Truck literate. Computer illiterate. Link to comment Share on other sites More sharing options...
Superdog Posted January 12, 2014 Share Posted January 12, 2014 shoulda looked at his pics better I guess,went back and looked,sure enough,2 intake tubes. Quote Link to comment Share on other sites More sharing options...
monserandsons Posted January 13, 2014 Author Share Posted January 13, 2014 regis. says 74 R685T45*** cab tag says R686ST12*** front axle 10,860 rear axle 19,000 GVWR 54,000 not sure what to do with that as far as parts? some more pics Quote Link to comment Share on other sites More sharing options...
monserandsons Posted January 13, 2014 Author Share Posted January 13, 2014 just want to say I recently learned computers and joined 3 different forums and I have by far got the most positive welcoming here thanks I have three kids and a million things goin on but I will make sure to document my progress here. thanks again 1 Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted January 13, 2014 Share Posted January 13, 2014 so where did the truck come from? your only 10 min from me in Canajoharie. we go to the Sharon tavern and the Trion Inn all the time for dinner, small world Quote Link to comment Share on other sites More sharing options...
monserandsons Posted January 13, 2014 Author Share Posted January 13, 2014 it belonged to my father in law he passed 05 check out my website im skilled carpenter if you need one- monserandsons.com Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted January 13, 2014 Share Posted January 13, 2014 Cab tag may not mean much.Check the serial number on the RH frame rail, just behind the RF tire. If the rail is original, that number might match the registration. If not, there have been some changes. By the way, I understand that, at some point, they started stamping the LH rail on the inside, as sort of a hidden way to track the original number, just in case sombody tried to alter or obscure the more easily seen one on the right.The "R685" would have been equipped with the ENDT-675 (237 HP) engine.Obviously, that's not what's in there!The engine model number should be stamped on the RH side of the gear case, near the front of the engine. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted January 13, 2014 Share Posted January 13, 2014 Here are a couple of pics to show the numbers...Look between the slotted plug on the fuel pump drive and the reservoir for the PS fluid. You can see the engine number in the pic.The frame one is easy.The front axle number should be stamped on the front axle beam, just below the RH spring perch. Maybe something like FA 534, or something. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
57 bcr Posted January 13, 2014 Share Posted January 13, 2014 POWERHOUSE!! Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment Share on other sites More sharing options...
GreenGiant2 Posted January 13, 2014 Share Posted January 13, 2014 i see your avitar has a cat crawler in it, we all love old iron here, lets see pics of it. . thanks for the comments about the forum, this is a great one and you will love it. Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment Share on other sites More sharing options...
Joe Ditchkus Posted January 13, 2014 Share Posted January 13, 2014 Looks like it was updated to a 300. Joe D. Quote Link to comment Share on other sites More sharing options...
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