Fan speed

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Apr 13, 2020 | 01:02 PM

#16

Yahiko

Fleet Owner

Joined: Apr 2012

Posts: 27,307

Likes: 549

From: Spanaway

The switch on the blue wire will turn the fan on 100%. So you will see a higher fan speed all the time with that.
So in that state you will have the air flow over the condenser to make the AC run. The down side would be
the extra load and over cooling the engine. You might think about the Snow Plow clutch. In both vases you will
hear more fan noise. I don't know if there will be any other down side things.

Apr 13, 2020 | 01:09 PM

#17

SmackDaddy

Postmaster

Joined: Sep 2016

Posts: 3,941

Likes: 240

From: Texas

I’ve always heard people complaining about the fan roaring...I have never heard it. Maybe my truck is just loud. If I wanted a quiet truck I would have bought an electric...

Apr 13, 2020 | 01:42 PM

#18

FiveOJester

Fleet Mechanic

Joined: Sep 2006

Posts: 1,491

Likes: 295

From: Fresno, CA

Quote:

Originally Posted by Hartwig

what kind of fan clutch do you use? Now, I have installed the snow plow fan clutch.

I think you were referencing my post above? I was talking about the stock 6.0 clutch which is electronically controlled. Still a mechanical clutch, but the amount of slippage is controlled by the PCM, not a mechanical spring like the 7.3 clutch.

Quote:

Originally Posted by Yahiko

Is the snow-plow clutch still electronic or mechanical like the 7.3 one?

Apr 13, 2020 | 01:47 PM

#19

Yahiko

Fleet Owner

Joined: Apr 2012

Posts: 27,307

Likes: 549

From: Spanaway

Snow Plow is electronic just like stock. It was an option for people doing plowing and seeing overheating do
to the plow blocking airflow and the low speeds they run at when working hard pushing snow..

Apr 13, 2020 | 02:57 PM

#20

Hartwig

Cargo Master

Joined: Oct 2018

Posts: 2,811

Likes: 1,911

From: unfortunately Germany

I have been mounted the snow plow fan clutch for a few days now. So far it has not been louder than the stock fan clutch.
But summer has yet to come...

Apr 13, 2020 | 03:04 PM

#21

gpeade

Laughing Gas

Joined: Aug 2004

Posts: 808

Likes: 0

From: P.G. VA

I added the "blue wire" mod to my stock fan clutch because I was having an issue with the fan not coming on but seeing temps 220+ when towing. Yeah its a little loud but personally I get used to it and the wife has never complained. With the fan engaged my temps go from 220 to between 198 and 205 when pulling. As long as I'm on flat ground I'm ok with the switch off so I just use it when needed on hills.

Apr 13, 2020 | 10:33 PM

#22

WolfCreek540

Mountain Pass

Joined: Apr 2016

Posts: 130

Likes: 1

From: Nampa, Idaho

This whole post disgusts me. It was 28 degrees F when I went to work this morning...

Apr 14, 2020 | 02:46 AM

#23

Yahiko

Fleet Owner

Joined: Apr 2012

Posts: 27,307

Likes: 549

From: Spanaway

Quote:

Originally Posted by WolfCreek540

This whole post disgusts me. It was 28 degrees F when I went to work this morning...

Mother Nature go and left the outdoor A/C on again over night?

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Apr 14, 2020 | 06:36 AM

#24

Visurveyor

Thread Starter

Fleet Mechanic

Joined: Jul 2018

Posts: 1,629

Likes: 103

From: Jacksonville Florida

Well on this morning, I'm more worried about windshield wipers. What a diverse country we live in. I luv it..

Apr 14, 2020 | 07:57 AM

#25

Fuzzpuss

Cargo Master

Joined: Nov 2015

Posts: 3,429

Likes: 946

From: Fort Worth, TX

Quote:

Originally Posted by SmackDaddy

I’ve always heard people complaining about the fan roaring...I have never heard it. Maybe my truck is just loud. If I wanted a quiet truck I would have bought an electric...

I had the same issues as Hartwig and went back to the stock 6.0 clutch, but I liked the sound of the 7.3 clutch. In the morning when I'd pull out of the driveway and head down the street it sounded like a semi.

Apr 14, 2020 | 02:38 PM

#26

FiveOJester

Fleet Mechanic

Joined: Sep 2006

Posts: 1,491

Likes: 295

From: Fresno, CA

Quote:

Originally Posted by Yahiko

Curious how that works. It's just the clutch, correct? Still uses the stock fan blade? Does it simply engage faster than the stock one? For example when the PCM is calling for 50% fan speed, it goes to 75% instead of 50%?

At full speed it wouldn't offer any benefit over stock as that is really driven by pulley size and not clutch?

Apr 15, 2020 | 10:12 PM

#27

HydroTek

Mountain Pass

Joined: Oct 2012

Posts: 233

Likes: 65

From: Southern Indiana

The snow plow clutch is ported internally a little differently than the stock one -- the problem is when air flow over the plow causes the fan to reverse direction(when disengaged) and then will not pump the fluid that connects the rotating part with the fan body -- the snow plow clutch is supposed to address this specific problem
Under "normal" conditions you will not see any difference in the two clutches -- since the PCM controls the amount of fluid transfer based on desired fan RPM

I would suggest that the OP needs to check the charge pressure of the AC system and likely clean the condenser and/or the whole air stack