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HMMWV Hydraulic Fan Clutch complete setup for all 6.2 and 6.5

WarWagon

WarWagon

Well it hits on 7 of 8...
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AZ
Let me start the interest in this setup. Is there a kit? Cost?

I would like to know how AC pressure is handled by this system as I need more fan for AC when the engine is relatively stone cold. I am curious as to others overall results.

It's clear the 'delays' in the Obsolete Spring thermal fan clutch locking in let the ECT get over 210 when working hard risking cracking and ruining rings in these IDI diesels.

So far popping the thermostat early with a 180 setpoint and a Kennedy Diesel low temp fan clutch and better duramax fan with a clean stack is as good as it gets. And that's razor's edge barley enough to keep you at or below 210 ECT.

The AC suffers when it's 120 degrees out, the fan is kicked out, and the engine is cold. Max AC load and the heat gets lost in the engine radiator thus the clutch fan spring doesn't get hot and kick in. I have blown AC seals and vented the system a few times with a hot engine on startup and fan is kicked out.
 
I am interested! I attempted to get one off a HMMWV before I retired. I also wouldn't mind an electric clutched fan if there even is such a thing.
 
On the electric driven one, I thought about using a a/c compressor clutch and machining a piece to adapt like a fan clutch eliminator would be used. Never chased it far enough though. Sometimes I think about just direct drive with my crappy airflow- What am I gonna get worse mileage? Ha!
 
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John will do the explaining here, I know he is testing my kit now, it will be a stand alone system and it will work with the AC as it should..

I am anxious to see the finish product in kit form... so far I've only seen pics.....

And the cost for the kit .. I didn't ask, I just wanted it... it will be worth the wait for me...
 
Will L. said:
On the electric driven one, I thought about using a a/c compressor clutch and machining a piece to adapt like a fan clutch eliminator would be used. Never chased it far enough though. Sometimes I think about just direct drive with my crappy airflow- What am I gonna get worse mileage? Ha!
Click to expand...

Will don't you already have this?! :p Yeah 100% lockup 100% of the time will suck power and fuel. Does you fan actually ever shut off in NV?

About the only thing one would notice over the factory type clutch is power loss from the fan locked up 100% and the 100% on or 100% off setting. However when I work the truck the fan clutch more or less is 100% on or off anyway. (Relative as 100% lockup is ~90% shaft speed on a silicone fluid filled clutch.)
 
Hey guys, thanks for the interest in the product. Yes, as Chris stated I'm in the development and entering into the testing phase of this setup. I am taking care while setting this up to ensure I can make this into a complete kit that will work with all the trucks.

A/C is something I've taken time to study. This will be accomplished with a Trinary switch that will replace the clutch cycling switch (low pressure safety switch) but serve the same function with the addition of supporting a hi pressure fan switch to cycle the fan clutch on and off depending on A/C demand based on head pressure. I'm starting off using the HMMWV Trinary switch used with A/C and this clutch. the 1994+ systems that are 134a are the target systems for this switch, but require a custom adapter to use standard thread switches. I'm having to fabricate the adapter as nothing exists in the aftermarket for this. For R12 systems that are converted to 134, this will take some additional testing to get the right switch that works.

I can't comment on price at the time. But pricing things out like the main drive solenoid, the clutch, and the HMMWV fan, these pieces aren't cheap. For the clutch assembly I'll be buying used units and reconditioning them.

I will start posting pics of the setup in about a month from now of the install etc. If you would like a setup, please let me know and I'll start talking with you about one.
 
What year trucks is everyone looking to have this kit installed on? It's looking like all 1993's so far. Wiring wise I will most likely have a harness and location for the 1988-1994 GMT 400 Trucks. There will also be something for 1995-2000 Trucks (I know HD's went to 2002) wiring wise. 1982-1987 Can be done on request, as some additional hard/braided lines have to be made plus wiring. In the end this will work with any 6.2 or 6.5 regardless of application, with the largest difference parts wise being the adapter puck for water pump bolt center.
 
I have a 1993. My trucks clutch is done. I have no idea how old it is. When I first purchased it is 2008 I could here it cycle. I don't anymore. I just need to know a price so I can start to save up some money.
 
I would be interested to see the cost for my hummer. I want to change the water pump to the balanced flow spin on. I can only fit a 19" fan iirc. I have air onboard, so I could use that if its cheaper than doing hydraulic hoses from the steering pump. Maybe a price on the clutch only?
Also what's the details with warranty or expected parts longevity?

I am a little familiar with the electric set up Les mentioned, so I we'll see which.
 
I use to have a picture, must not have it anymore. It surprised me the first time I saw it.
 
FYI this kit uses the HMMWV fan blade which is 19.5", so adaptation into an H1 would be totally doable.

I am also looking into taking either or both of the fan offerings for the 6.5 and adapting them to this clutch. The Duramax fan and the Standard 97+ 6.5 fan. This will require a lot of modification to either fan to work, but may end up being less expensive than the 19.5 HMMWV fan blade is, plus with a bigger fan.

I know a question concerning warranty was brought up. Most likely 1 year component warranty.
 
I am not planning on keeping a kit in stock. This is a speciality item that will be a built at order type of thing. I will post a ballpark price for an entire kit worth of components before the end of this coming weekend. At this point you can decide if you would like me to build you one. Because of how speciality this is I cannot guarantee how long this will be available primarily due to parts availability and cost in the future of components. Individual components from what will make a kit will not be available for purchase separately. Will be available for purchase as soon as a price is posted.

John
 
Here is a couple pics of the setup. Please excuse the dirty engine as this is being tested on my beater driver.IMG_0951.jpg

IMG_0950.jpg
 
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