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Old 07-27-2011, 08:04 AM
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HFCM

Hi hope i don't sound like a dork I'm a little new to the diesel truck, I have herd a lot about draining the HFCM what is that,and how do i do that. Also concerned about weather or not my truck is a job 1 or 2 and so on a lot of issues with job 1. build date is 02/08 thanks for any help.
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Old 07-27-2011, 09:24 AM
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You are definitely past the job 1 run, could be a 2 or 3, I forget the dates of job runs.

The HFCM sits inside the frame rail, just about under the driver's seat. There is a little yellow valve that you can open to drain any water out of the system. A good idea to do it every month or so. I use a cut-off soda bottle (clear) to catch the drained fluid. The fuel should look similar to Mountain Dew, any water will show up at the bottom, usually looks whitish. You should only need to drain it until solid fuel comes out, I usually drain 3/4 cup and that does it.

Apparently these 6.4's don't like ANYTHING other than pure ULSD. A good idea to change the fuel filters every 10k miles too, the book says 20k, but it's up to you.

Have fun with it!

Tim
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Old 07-27-2011, 10:22 AM
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Thank you for your help!
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Old 07-27-2011, 10:44 AM
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I opened the lever and nothing came out, even tried with it in idle.
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Old 07-27-2011, 10:52 AM
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Sounds like it's plugged up. How many miles are on the truck? When was the last time it was drained? When was the last time the fuel filters were replaced.
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Old 07-27-2011, 11:08 AM
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Quote:
Originally Posted by dubb75 View Post
I opened the lever and nothing came out, even tried with it in idle.
yea i think it sould drain water first then fuel should come out maybe the drain is clogged
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Old 07-27-2011, 11:13 AM
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Mine did that too at first. With the key on,it finally pressured through and has drained well ever since. I don't know if sticking something up the hole with the valve opened would work. It definitely needs to be drained periodically.

It may be time to open the filter housing and clean the drain (and change the filter while you're at it).

Good luck and let us know how you made out.

Tim

Last edited by t613; 07-27-2011 at 12:21 PM.
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Old 07-27-2011, 11:14 AM
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I have 18,000 miles, put on 5,000 since i bought at dealership.
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Old 07-28-2011, 07:47 AM
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I would bring it back to the dealer it should be their problem. Good luck
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Old 07-28-2011, 10:50 AM
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Quote:
Originally Posted by theplumbingmedic View Post
I would bring it back to the dealer it should be their problem. Good luck
Agreed. Make the dealer clean it out and drain the water. I make sure that they drain the water separator every time that I change O&F just for documentation. Fuel filters every 10k miles as well.
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