Popular Post Deere Mack Posted February 25, 2014 Popular Post Share Posted February 25, 2014 Good morning all, I think I might have found a good truck to start out with for a dump. After traveling the south eastern united states only to find butchered up junk, I found this girl about 20 miles from home. It was bought new at our local Mack dealer and I know the history from new. Everything still there and in working order, just needs a little tlc, but runs and operates well. I think it'll make a good site truck. I'll post more photos when I get it home. Tell me what you think!1979 Mack RD685S 5 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/ Share on other sites More sharing options...
hicrop10 Posted February 25, 2014 Share Posted February 25, 2014 I have a 79 R model tractor that has only 70,000 orignal miles on it.We have owned it since new.Looking at your truck it loks like it was well kept.I would look over the frame and make sure there are no bad cracks,or any other issues.The motor and trans well they are what they are without having to go through them.My truck has 38,000 lbs rears and we used it with the other 19 of them to pull dump trailers.The truck that I kept out of the bunch,I took a load over to the landfill in NJ that weighed in at 113,000.They were all loaded in the 80,000 to 90,000 everyday except on Saturday then we wouldn't leave them leave the scale unless they were in the range of 95,000 to 105,000.We never had any issues with the trans or rears.You are thinking about now what the hell we were hauling.We had a sewer plant job for the city of Phila.and we had to haul a million and a half yds of waste to the landfills of Nj.We were getting about 12-15 overweight tickets aday.Saturday would make up for the other 5 days.We were running 30 of our own TT,along with 100-125 owner opertors. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234515 Share on other sites More sharing options...
Popular Post Deere Mack Posted February 25, 2014 Author Popular Post Share Posted February 25, 2014 I agree Mike, the engine and trans do what they are supposed to. This truck will clean up nice, it's in its original condtion, still has the original Mack 8 track radio. Once I get all the mechanis in order I'll probaly freshn' up the paint, change colors. The hour and speed gauge work, but I'm not sure they are accurate. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234520 Share on other sites More sharing options...
rsb502 Posted February 25, 2014 Share Posted February 25, 2014 SWEEEET! Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234524 Share on other sites More sharing options...
j hancock Posted February 25, 2014 Share Posted February 25, 2014 Looks great from my house! Hope it works out well for you. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234526 Share on other sites More sharing options...
Deere Mack Posted February 25, 2014 Author Share Posted February 25, 2014 Thanks guys! I must say that the fine people on this website have inspired me to keep this girl alive and working! I'm sure ya'll get to know it well...lol Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234548 Share on other sites More sharing options...
mackey58 Posted February 25, 2014 Share Posted February 25, 2014 Your truck will still be runnin strong while the new ones with all the electrical shit are down just keep up the maintenance grease her and change the trans and rear end fluids she ll work everyday good luck and keep us posted Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234550 Share on other sites More sharing options...
Deere Mack Posted February 25, 2014 Author Share Posted February 25, 2014 Ok, I've searched and I'm about to run out of time, need to leave to go pick up. I've got the 2 stick 6 speed, anyone have the shift pattern? When I drove it the first time I was getting coached....lol Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234569 Share on other sites More sharing options...
Deere Mack Posted February 25, 2014 Author Share Posted February 25, 2014 Would this be it on the bottom right? Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234570 Share on other sites More sharing options...
Popular Post Freightrain Posted February 25, 2014 Popular Post Share Posted February 25, 2014 I'm thinking, other then Reverse, you can drive it like a 5spd empty(leave compound in DIRECT). Just remember, the shifts are really slloooowwwwww between gears. Once in neutral gate take a bite of sandwich or drink of coffee, then slip into next gear. 4 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234577 Share on other sites More sharing options...
thomastractorsvc Posted February 25, 2014 Share Posted February 25, 2014 yep that's it, same as my 80 R Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234578 Share on other sites More sharing options...
mrsmackpaul Posted February 25, 2014 Share Posted February 25, 2014 need to let engine revs drop about 800 revs between gears when going up and raise them about 800 going down through the gears you will probably never need deep reduction so just leave it in direct watch the tacho to start with it will become a piece of cake fairly quickly good luckPaul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234579 Share on other sites More sharing options...
Joe Ditchkus Posted February 25, 2014 Share Posted February 25, 2014 To raise body put compound in neutral and main in third gear.That was best gear for mine in raising box. It depends a lot on what % PTO is rated at. Do not try to split gears with compound when going down the road the trans is not designed for it. Joe D. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234582 Share on other sites More sharing options...
mackey58 Posted February 25, 2014 Share Posted February 25, 2014 lol freighttrain thats right!!!! Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234586 Share on other sites More sharing options...
Deere Mack Posted February 26, 2014 Author Share Posted February 26, 2014 Just made it home! Easy as pie! I feel more at home in that truck than my CH.My Mack dealer ran the #'s and had this to say:Mack 300+ engine (315 HP)TRXL107 2 stick 6 speed compact trans464 ratio38,000 rears with anti sway18,000 front axleBuild date 01-09-79 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234639 Share on other sites More sharing options...
keg1 Posted February 26, 2014 Share Posted February 26, 2014 Nice Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234642 Share on other sites More sharing options...
Joe Ditchkus Posted February 26, 2014 Share Posted February 26, 2014 If your truck is a R-685 the 300+ was not an option in that model. It would have a 237 Maxidyne from factory. The 6 speed would not work well with a 6 speed it would need a mininum of a 9 speed. Joe D. Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234645 Share on other sites More sharing options...
Joe Ditchkus Posted February 26, 2014 Share Posted February 26, 2014 I cannot see tip turbine or intercooler in your pictures. I think a 237. Joe D. Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234646 Share on other sites More sharing options...
Deere Mack Posted February 26, 2014 Author Share Posted February 26, 2014 I'm not sure, I gave him the serial and thats what he told me. It was pretty cool though, the trucks was bought new from them by one of the larger contractors at the time an he remembers it. Said the guy ordered it for his personal use and was used around the farm etc. Supposidly wasn't put in the fleet. I'm can't varify anything cause the original owner is with his maker but I do plan on trying to find out. I'll get what ever you guys need to help varify the engine. Thanks!By the way, this truck is awsome!! Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234654 Share on other sites More sharing options...
Popular Post 2stacksuperdog Posted February 26, 2014 Popular Post Share Posted February 26, 2014 Those also aren't 38 rears. More like 44K/46K. Also looks like a 237 under the hood which would agree with RD685 3 Quote Matt Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234656 Share on other sites More sharing options...
Joe Ditchkus Posted February 26, 2014 Share Posted February 26, 2014 My eyesre not the best but like2stack said looks like cones on the rears 44,000.Joe D. Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234661 Share on other sites More sharing options...
1958 F.W.D. Posted February 26, 2014 Share Posted February 26, 2014 Send an email to the Mack Museum with your serial number and request a copy of your file. Be sure to send them a NICE donation- you will understand why when the large, heavy box arrives via UPS. Free by the way. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234663 Share on other sites More sharing options...
Deere Mack Posted February 26, 2014 Author Share Posted February 26, 2014 Looks like I'm going to name her Mystery. ..lol The guy I bought it from said he was told it was special order, again I don't know. I wouldn't mind having the info from the mack musem, that would be nice to have. Here's a couple more pics or clues. I can take more pics or get different numbers tomorrow if it'll help us figure it out. I felt like the rears were heavier too. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234667 Share on other sites More sharing options...
2stacksuperdog Posted February 26, 2014 Share Posted February 26, 2014 237 hp 1 Quote Matt Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234668 Share on other sites More sharing options...
Maddog13407 Posted February 26, 2014 Share Posted February 26, 2014 what dealer ran that number? ay dealer that serviced that truck since new should know what it is and def what an R685 is. def a 237 with no intercooler present, and def not 44 rears with those bigger spokes. the older 38's had coned and the same hubs as 44, just the 44's had the bracing on the housing. Quote Link to comment https://www.bigmacktrucks.com/topic/34812-mack-dump-truck-search-nearing-the-end/#findComment-234669 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.