kimmel1 Posted June 25, 2013 Share Posted June 25, 2013 i have a 98 rd688s with an e7 350 replaced t-stat, fan clutch, oil cooler and radiator cooked out and rebuilt.removed water pump looked ok the truck runs 180 but when loaded on a long pull it gets hot but has never overheated is this normal for macks or do i have a problem? any help would be greatly appreciated thanks Quote Link to comment Share on other sites More sharing options...
Lmackattack Posted June 25, 2013 Share Posted June 25, 2013 I drive a 400 and we do lowboy,heavy haul...flat land IL butthe temp jumps up to around 200 on every pull. Fan will kick on and off like crazy when it's warm out. Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted June 25, 2013 Author Share Posted June 25, 2013 Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted June 25, 2013 Author Share Posted June 25, 2013 that is as hot as it will get ac on all the way over the mountain but seems to warm to me Quote Link to comment Share on other sites More sharing options...
bbigrig Posted June 25, 2013 Share Posted June 25, 2013 Still in the green looks ok to me. 200 is a good average for a long loaded pull and if you have an air fan clutch is about where it should be cutting in and out. Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted June 25, 2013 Author Share Posted June 25, 2013 yes turns on and stays on till i level out thanks for the posts Quote Link to comment Share on other sites More sharing options...
keg1 Posted June 25, 2013 Share Posted June 25, 2013 I have a 400 in my Ch and it gets up real close to the red on a long pull. Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted June 25, 2013 Author Share Posted June 25, 2013 Ok I'll keep it to the wood thanks for the info Quote Link to comment Share on other sites More sharing options...
slpwlker Posted June 26, 2013 Share Posted June 26, 2013 You running across 68 and 70? 200 should be it or good. if you got a manual fan override I would flip it on at the bottom, Now mind you it will rob power but I just hate having the fan on,off,on,off. There are some good pulls that way Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted June 26, 2013 Share Posted June 26, 2013 205 is not too hot on a long hard pull. Quote glenn akers Link to comment Share on other sites More sharing options...
kimmel1 Posted June 26, 2013 Author Share Posted June 26, 2013 Don't know what you mean by 68 or 70 no manual override Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted June 26, 2013 Author Share Posted June 26, 2013 Don't know what temp it is going to but middle # is 180 Quote Link to comment Share on other sites More sharing options...
slpwlker Posted June 26, 2013 Share Posted June 26, 2013 Don't know what you mean by 68 or 70 no manual overrideYour in Md. I 70 and I68 or meaning you never go west of any of the loops around Baltimore or Dc. Quote Link to comment Share on other sites More sharing options...
lucerne tractor Posted June 26, 2013 Share Posted June 26, 2013 Mine runs way low, lower edge of the green 150? but runs up to 200 quick when pulling, the fan jumps in and out to keep it under controll. You look fine where your running. Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted June 26, 2013 Author Share Posted June 26, 2013 Yes 70 695 270 495 I stay local mostly Frederick and surrounding area Quote Link to comment Share on other sites More sharing options...
mclow Posted July 2, 2013 Share Posted July 2, 2013 I have a EM7 300 in my RD690 and it runs this hot while loaded im sure its normal I have run it this way for a long time Quote Link to comment Share on other sites More sharing options...
kimmel1 Posted July 6, 2013 Author Share Posted July 6, 2013 Thanks for the info it has run like this since I got it Quote Link to comment Share on other sites More sharing options...
j_martell Posted July 6, 2013 Share Posted July 6, 2013 Irrelevant, I know, but my 2011 mp7 will climb to 205-210 on a long loaded pull. Once it levels off, she settles back down. Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment Share on other sites More sharing options...
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