BAC Forum
General Boards => Technical Support => Topic started by: John Padmore on July 25, 2013, 08:26:22 PM
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I have one of these. No manual or anything. No power light on so I guess it doesn't work. With engine running nothing happens when I push either air or h2O purge. Any idea how to begin troubleshooting this thing? :(.....thanks.
John
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That could be part of an original fuel filter system put on by some coach manufacturers. It's possible your coach uses Racor filters now and the older manual purge system was bypassed and is no longer used; what you are looking at is probably a leftover inoperative control switch that no one bothered to remove.
I'm not up on these sorts of things, and this is just a guess.
Joel
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I have one of those mounted on the Rayco fuel filter. I tried it once and it seemed functional. Try it with the engine off...that worked for me.
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John, Where is this located? I have 1997 Marquis with Cat. C-12 and have not seen this anywhere, but a lot of controls are hidden beyond easy access!
Thanks, Gary
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John
Here is a link to a PDF file on how to run it. http://www.rvsurvey.com/Documents/winnfuelsystem.pdf
Steve
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Guys, thanks for the input and the PDF document. To those who have one, where does the water sensor plug into? Mine is just dangling there , maybe this is why there is no power? Thanks.....
John
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Here is a picture of the entire system, if it helps to locate where the sensor is plugged into.....thanks.
John
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John,
It is on the bottom of the aluminum housing on the white filter, may need a mirror to see it... Some coaches may not have this feature or the warning light I believe.
Later Ed
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Ed, you are right....there is one there....also. This wire is just laying there and the one on the bottom of the housing is attached.
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Perhaps I have a different filter - mine is a Luberfiner LFF8727.....thanks
John
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John,
This unit has an accessory heating element as an option and the wiring harness probably allows for that but we do not have the heating element installed in ours. You have the same filter unit as the rest of us but a longer aftermarket cartridge filter than the original Racor replacement. There sometimes is a small trouble light thing in this bay, se if the wire might go to that and if not I think you are all good to go, just tie wrap that wire out of the way to the existing water sensor wire.
Later Ed
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Ed, do you know where this unit get's power from? My power light is not on so the unit won't work......thanks.
John
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John,
This is a recollection and maybe someone can chime in here. I think the power comes with the front ignition key in the on position and the rear run switches for the coach that are in the filter service bay in the rear run position. I think the rear run on provides the power. Let us know if that works.
Later Ed
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On my unit, the power light is on all the time. Power for purge is available without the key being in the "on" position. The engine start/stop buttons do not work unless the key is in the "on" position.
Hope that helps, there maybe a fuse link in that power line to the control panel.
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OK, I tried it with the key on and with the rear switches in various positions and still no power or purge....so I thinking in line fuse somewhere......thanks.
John
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Can someone tell me what the Schrader valve is used for on the top of this unit?
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John,
The Schrader valve that you are referring to has little or no use in the application that it is used in on a Beaver. In an application were a transfer pump is used before the Racor filter housing (Beaver does not use one), the Schrader valve can be used to check pressure or bleed air. However, on a Beaver the only possible use for the valve is to bleed air, but this will only work if you have a full fuel tank because you will be using gravity instead of pressure to purge the air.
Gerald
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Thanks, that clears it up.
John
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Gerald,
Do you remember how your control unit is wired? Do you have to be in rear run and ignition on to be able to activate it? I am not sure that I remember this correctly....
Later Ed
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Ed,
The electric control for my Winn water separator and primary filter is wired so that it is hot at all times.
Gerald
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Thanks Gerald, I will have a peek at mine when I get a chance. I probably remembered it wrong. We headed south from just north of Seattle through Portland today to the McMinville OR area. The traffic was not the best, glad I do not have to drive the RV through that nightmare everyday.
Later Ed
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Well, I never found a fuse or circuit breaker for the unit so I assume the unit is defective. Left with no way to purge water from the bottom of the filter I came up with this solution. Took the hose from where the Winn would discharge the water/fuel mixture attached it to a pet cock valve and ran a new purge line outside of the bay. Now to purge any water I simply put a container under the hose, open the pet cock and push the Schrader valve and the water/fuel mix flows right out.
John
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John,
I am not so sure that is a good idea. As you drain the bottom using the valve with the Schrader open, I think air would be pulled in the Schrader valve as the fuel and or water drains out of the bottom. Getting air in the filter with no pump to purge it could get the injection system air bound. The existing pump was there to bring in fuel as you drained water off and to purge air out of both filters using the top fittings like the Schrader and a 1/4 inch plug in the Cat fuel filter housing. Once the air was cleared using the Winn pump you could then start the engine. At some point one way or another you will need a fuel pump of some kind to purge the filters of air. The drain system that you added could probably be used with the engine running and no opening of the Schrader as long as you find some pressure forcing fuel out when you open it. Get a second opinion before doing that, I am not completely sure if there is a pump pre the filters but I think that is true.
Later Ed
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John,
I did not mean to imply that there is anything wrong with your drain system with the added hardware. It does have to be air tight given you do not want any air to get into the system. It is just that bleeding with the procedure you mentioned could allow air to enter and without an operation purge pump that is a concern. It would seem that measuring for 12V on the wire that goes into the control box comes next and see if it has power. If not you could get power from the battery area and test it to see if it works.
Later Ed
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Not that you're looking to spend money, but I did have a talk with my CAT dealer about the cost of taking out the Racor filter system entirely and replacing it with a CAT filter with priming pump. He figured roughly that I was talking about ~$700 in parts plus labor. Not that there's anything fundamentally wrong with the Racor, but the filters are a bit harder to come by. They're readily available through marine supply places, but not as common at truck centers. CAT filters (or their generic equivalents) are easy to obtain.