Yesterday I made a plate to slip into the ashtray for my manual on/off switch for the fans. I did not want to rely wholly on the coolant temperature switch.

Here is a link to that thread....

1stGen.org ? View topic - Putting Rocker switches in your ashtray....

here is a pic of it installed in the truck...



And a week or so ago I installed the coolant temperature switch below the T-stat housing...since I have a NV4500 I did not need that location for the engine coolant lines to the water/oil cooler for the tranny.

The switch is on and 200* and off at 185*, and is a ground to the block as it's switch. It was 3/8" NPT, and I had to get an adapter to fir the block since it is 1/2" NPT.

 

Made up a plate to mount the 85 Amp constant duty solenoid, and 30amp circuit breaker behind the battery using a couple existing holes in the fender.



Then pull the fan and shroud and get the new electric fans in place. But first I had to find a couple small bolts, and drill a couple holes in the fan frame. Then a slight bit of round file work to make the bolt sit nice and flush.

 

Then it was wiring time. Not that I don't like wiring, but it's a tedious job to do it right. I mechanically crimp each connector, then solder it, then add dielectric grease, then shrink tube. And then there is my large size to deal with...big body and hands, and long arms does not equate to easy working conditions under the dash.

So a couple hours of wiring and it was all done. I Ran the wire from the Temp switch up along the upper rad hose...fiber tape, and then a zip tie to hold the tape....see how this stands up to the heat and vibrations?

Wired the fans individually into a 4 gang wiring block I had...so each has it's own power and ground, and can be unplugged easily.





And you can see all the room I have between the fans and the front of the motor..





There is about a 1/4" gap between the fan frame and the rad, I'm going to see how it cools with that gap left open, but thinking it might pull air from around the frame a bit more then I'd like.....but we will see. But I had planned on running some foam weather stripping from the hardware store to make a tighter seal, and allow the fans to pull air "only" through the rad.

So that's about it...will report back on any MPG I gain, or cooling issues I find....good or bad.

 

So you will reinstall your mechanical fan for the summer?

It appears that your 12v source wire is running from the battery post through the 30 breaker to the 85 amp solenoid. Is that correct? why the amperage mismatch and why such a big solenoid?

 

Trashing, I have seen trucks where people pull clutch fans for the winter around here and replaced with nothing till the clutch fan goes back in at springtime.
I just install a large piece of cardboard in-between the Rad. and the intercooler in my 2nd gens that I run in the winter.

I could see a MPG improvement from removing the clutch fan.
Nice job.

 

I had read about people doing the same thing...that is what made me want to do this mod. We don't get cold enough here on the Wet Coast of BC to warrant no fan.....or I'm too scared to trust the ambient air to do all my cooling for me.

 

Hmmm

 

Great work sir

 

As the saying goes, you can do a small job with a big tool...

Looks like both fans will pull 14 amps so 30 amp breaker should work great.

 

Trashing......

Tee hee hee.......

Hey TC

Is your battery from March of 2012 ? And still working ?

You got a goodie.......

 

Yeah Oliver and his "trashing" designation...term of endearment I guess....

Yup that one is from the 4wd donor truck and is from 2012....and my other one is from 2010...and still going! I swap them about every 6 months or so to keep them fresh.

 

Yeah I just figured a guy with Thrashing[cows] for your name, and the fact that you like to listen to good old heavy "trashing" metal music….I just figured Thrashing was a good fit for you. I can use TC, or anything else though if you prefer.

I just realized it got auto corrected to Trashing…Sorry Brain.

 

Oh I don't care in the least, in fact it usually makes me grin everytime I see you use "Trashing".

 

Sometimes I am an idiot.
Maybe I should practice typing...tHrashing, tHrashing, tHrashing.

 

You should see what my spell correct does to Cummins