dec1259 Posted November 9, 2012 Share Posted November 9, 2012 Have 2003 rd688s with e7 mack engine and the fan clutch stays engaged. Can anyone help me on this issue? Quote Link to comment https://www.bigmacktrucks.com/topic/28234-fan-clutch/ Share on other sites More sharing options...
Mackpro Posted November 9, 2012 Share Posted November 9, 2012 I assume its an air fan clutch? If so check fuse # 41 ( i think) in the fuse box in the middle of the firewall under the hood. This fuse powers the fan clutch circuit. Also check the A/C high pressure switch, if its a open circuit it will keep fan on all the time. Quote Link to comment https://www.bigmacktrucks.com/topic/28234-fan-clutch/#findComment-145188 Share on other sites More sharing options...
rsb502 Posted November 9, 2012 Share Posted November 9, 2012 and if its not an air clutch go get a new thermostatic clutch and swap it out, but I dont think they ran them after 2000 or 2001 I cant remember. 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/28234-fan-clutch/#findComment-145221 Share on other sites More sharing options...
dec1259 Posted November 11, 2012 Author Share Posted November 11, 2012 (edited) Don't think its an air clutch Where it's the thermostat located. And thanks for the help every one. Edited November 27, 2012 by dec1259 Quote Link to comment https://www.bigmacktrucks.com/topic/28234-fan-clutch/#findComment-145507 Share on other sites More sharing options...
dec1259 Posted November 27, 2012 Author Share Posted November 27, 2012 (edited) Thanks for the input, had to change the fan hub. It was not as hard as i thought. It was not an air hub or electric. Take the 5 mounting bolts and pull the fan and hub out. Remove the fan from the hub and place it on the new hub, then reinstall. This type of hub was about $195.00. Edited November 27, 2012 by dec1259 Quote Link to comment https://www.bigmacktrucks.com/topic/28234-fan-clutch/#findComment-148299 Share on other sites More sharing options...
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