fan clutch on 2005 mack - Truckers' Trucking Forum | Message Board

tommbo · **^ Top** #1 08.02.2005

hi all! i drive a 2005 mack granite with the most annoying fan cluch that engages way to much. i was told the computer is set for economy and it makes the engine run cooler to save fuel. how can i adjust that darn fan so it doesnt engage so often. i am off road alot and boy does that fan create a dust storm. thanx for your help..

PortlandDriver · **^ Top** #2 08.07.2005

You might want to get to the shop for that, it's going to take a computor to hook to the data port to make the change.

tomsway1 · **^ Top** #3 05.27.2007

Also have a mack, am told to get used to the fan coming on. They can change at what temp it engages and dis-engages, but the fact is they are getting a lot of HP out of an 11 liter engine and it makes a lot of heat and a small radiator opening does not allow for enought air movement. Bolus trucking out of Scranton, PA went so far as to put extra air intakes on the side of the hood and two hood scoops on the top of the hood to try and get the heat out from under.
They claim it works, and the side benefit is, you never have to worry about ice on the window in the winter

Burky · **^ Top** #4 05.27.2007

The Mack does throw a lot of heat out when the fan kicks in. I have noticed that hanging my arm out the windown when it kicks on is a good way to get the flesh roasted off. Well, maybe it's not quite that bad, but it does get warm very quickly. The timing of the fan is going to be controlled through the software, so there isn't anything that you can do at home to affect it. It's going to be up to the owner and theservice parameters that mack can put in if he wants to change it.

My solution, crank the window up and turn the A/C on high.

Slow_Starter · **^ Top** #5 05.27.2007

Quote:

Originally Posted by tommbo

hi all! i drive a 2005 mack granite with the most annoying fan cluch that engages way to much. i was told the computer is set for economy and it makes the engine run cooler to save fuel. how can i adjust that darn fan so it doesnt engage so often. i am off road alot and boy does that fan create a dust storm. thanx for your help..

And if this also includes the emissions they will not touch it. It could very well void out any warranty the truck still has. It is very best you do not mess with this. You could get fired for cooking an engine. Then try finding a job after you destroyed an engine. Can you say *permanetly unemployed*.?

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