Any pointers / tips for replacing HFCM?
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Posting Guru
Joined: Oct 2006
Posts: 1,693
Likes: 7
From: Francestown, NH
Any pointers / tips for replacing HFCM?
New one arrives today from Riffraff.
Those of you who have replaced the HFCM can you share any best practices and lessons learned please.
Remove top filter and suck out the fuel from the bowl? Yes / No.
Drain the HFCM plug? Yes / No.
Remove the bottom filter before removing the old one from the rail? Yes / No.
Any order to remove the fuel lines? Yes / No.
Fuel will run from the lines until the new one goes back on so get ready for a diesel bath? Yes / No.
Find something to plug the fuel lines while you have the old one off? Yes / No.
Fuel lines go back on in a particular order? Yes / No.
Attach one side of fuel lines before mounting on to the frame rail? Yes / No.
Any torque values I need to know about?
Anything else anyone can think of.
Thanks.
Those of you who have replaced the HFCM can you share any best practices and lessons learned please.
Remove top filter and suck out the fuel from the bowl? Yes / No.
Drain the HFCM plug? Yes / No.
Remove the bottom filter before removing the old one from the rail? Yes / No.
Any order to remove the fuel lines? Yes / No.
Fuel will run from the lines until the new one goes back on so get ready for a diesel bath? Yes / No.
Find something to plug the fuel lines while you have the old one off? Yes / No.
Fuel lines go back on in a particular order? Yes / No.
Attach one side of fuel lines before mounting on to the frame rail? Yes / No.
Any torque values I need to know about?
Anything else anyone can think of.
Thanks.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
Nothing really special to do Colm. Have a container handy because you will get fuel spillage regardless. The way to minimize it is to have the new HFCM in hand ready to snap the fuel lines back on AFA possible.
Posting Guru
Joined: Nov 2012
Posts: 2,123
Likes: 5
About that container in case you have the bad luck to get one that just keeps draining use a big one.
Had one of those once tried all kinds of things never did get it to stop.
Otherwise tim is spot on. No real right or wrong way.
Had one of those once tried all kinds of things never did get it to stop.
Otherwise tim is spot on. No real right or wrong way.
Logistics Pro
Joined: Mar 2013
Posts: 4,097
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From: Kissimmee,Fla
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Posting Guru
Joined: Oct 2006
Posts: 1,693
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From: Francestown, NH
Got it done today. Here's a few notes for the next person doing this:
Cheapest price I could find was Riffraff, by the time you factored in standard shipping.
Number on the part was 6C34-9G282-AE.
I sprayed PB blaster on the 3 nuts holding the HFCM on the frame. I removed the top fuel filter and fuel from the bowl. I drained the water separator and removed my upgrade plug to put it in the new HFCM. I removed the large filter. I opened the fuel tank. (Maybe I didn't need to do these last two steps but I figured maybe it would get all the fuel out of the lines for the next step and release any pressure.)
I undid the electrical connectors. I separated the 4 fuel lines. The top two required the 5/16" tool and bottom two required the 3/8" tool IIRC. I didn't get too much fuel out of the lines. I undid the 3 nuts holding the HFCM on the rail (13mm socket).
I put the new part on and reattached the fuel lines and electrical connectors. I swapped in the upgraded HFCM plug. The new HFCM already contained a filter with a lubricated o-ring on the cap. I put in a new top end filter.
I keyed the engine to KOEO and watched my fuel pressure gauge until it came up to 65psi. It took a few but eventually it got there. Turned the engine over and it started like it should. Took it for a drive and no more falling fuel pressure and loud whine from the pump.
Cheapest price I could find was Riffraff, by the time you factored in standard shipping.
Number on the part was 6C34-9G282-AE.
I sprayed PB blaster on the 3 nuts holding the HFCM on the frame. I removed the top fuel filter and fuel from the bowl. I drained the water separator and removed my upgrade plug to put it in the new HFCM. I removed the large filter. I opened the fuel tank. (Maybe I didn't need to do these last two steps but I figured maybe it would get all the fuel out of the lines for the next step and release any pressure.)
I undid the electrical connectors. I separated the 4 fuel lines. The top two required the 5/16" tool and bottom two required the 3/8" tool IIRC. I didn't get too much fuel out of the lines. I undid the 3 nuts holding the HFCM on the rail (13mm socket).
I put the new part on and reattached the fuel lines and electrical connectors. I swapped in the upgraded HFCM plug. The new HFCM already contained a filter with a lubricated o-ring on the cap. I put in a new top end filter.
I keyed the engine to KOEO and watched my fuel pressure gauge until it came up to 65psi. It took a few but eventually it got there. Turned the engine over and it started like it should. Took it for a drive and no more falling fuel pressure and loud whine from the pump.
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