BAC Forum
General Boards => Technical Support => Topic started by: Tim Schafer on July 10, 2016, 05:34:11 PM
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When I bought my coach it had the following after market filters already installed in the maintenance bay.
BT839 Hydraulic filter
BF7634 Fuel Filter
FS19592 Water separation filter.
My googling skills have come up with the following Cat part #s for 2 of the 3. Can anyone confirm if these are the correct part #'s and what the correct Cat part # for the water separator filter is.
773492 077-3492 for the hydraulic filter
1R-0751 for the fuel filter
??? for the fuel separator.
I have a 97 patriot with the cat 3126 engine.
I don't know where to find the serial # of the engine, if someone can give me a pointer on where to find it I'll be glad to post it too.
Thanks,
Tim & Ann
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Hi Tim,
The CAT part number on my 2001 Contessa 3126B for the fuel/water separator is: 175-2949
I haven't changed my hydro filter yet and needed this number....wasn't sure how to change it because of how its mounted, didn't want to lose all the fluid if I removed it to try to match for a new one?
The serial number should be on top of the valve cover on a metal tag.
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Tim. If you would email Dave Atherton club member and 42 year retired CAT mechanic he will be more then happy to assist you. david.e.atherton@gmail.com
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Tim
The sereal no. Should be on a white label on top of the valve cover.
There was no hydraulic filter on our '98- 3126B.
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When we had our 1991 Contessa the hydraulic filter was in the can that you checked the hydraulic fluid at. It had a clamp that you took off (like a removable barrel lid) to get the top off of the can and there it was immersed in the fluid. I found it by accident when I wanted to repaint the can top that was getting rusty. It did not smell too good (burnt) as I do not ever believe it had been changed in 12 years when I found it. I wasn't a BAC member then so I did not have the benefit of the forum.
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Tim,
The engine serial number will not help with the hydraulic and water separator filters because those two filters were originally installed by SMC from aftermarket suppliers and not Cat. Your water separator filter is probably a Racor.
Gerald
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Does that mean I don't necessarily need to use cat brand filters for the hydraulic and water serparator? and only for the fuel filter?
Because they are quite a bit more expensive than the ones that are on it now. Also approx what maintenance window is recommended for replacement of these? I've owned it a year, they came on it and it had sat for 18 months prior to my purchasing it, so I'm assuming they are 3 years old at a minimum. I've only put 1k miles on it since purchase, so haven't abused anything to bad yet, but want to get done what I can and just need to know for future reference how often to replace. Yearly? After x miles, etc.
Thanks,
Tim & Ann
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Hydraulic filter I use on my 96 Patriot is a Wix 51551
Secondary fuel filter is a fleetguard FF5321
I converted my racor to a cat water seperator but the Racor cartarge filter is a Wix 533621
Use the filter that works for you Wix puts out excellent filters for your coach. I change external filters once a year, and I just changed my transmission filters at 110000 miles. Most folks on here do yearly fluid/filter changes
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Bill,
I would only use a Cat secondary fuel filter, but the hydraulic and primary/water separator filter can be any good brand filter in my opinion. The Cat secondary fuel filter is a 2 micron filter that is critical in keeping any dirt out of the injector system, and not many other brands have filtration that fine. However the 30 micron primary/water separator is a normal filtration level (filters out sticks and leaves) that is commonly available from most suppliers as is the filtration level for the hydraulic system.
The change interval on filters is a personal decision in low usage situations. Cat recommends changing the secondary filter once yearly, and I would follow that unless you are comfortable in changing it beside the road if a restriction develops and you understand how to recognize when one happens. However, if you are using fuel from a major truck stop, and driving very little (3,000 to 8,000 miles a year), I see not reason that you can not stretch that change interval to as much as every other year.
The primary/water separator filter and hydraulic filter, I would change every 3 years or so unless you have other issues like contaminated hydraulic fluid or microbes (diesel algae) in your fuel.
Gerald
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Hey Gerald
The fleetguard filter on the secondary is a 2 micron. I bought it because it was a 2 micron and has a good reputation in the OTR trucking world, being significantly less expensive than the cat version helped as well ;D. I change all my filters yearly at the beginning of my spring travels whether I think they need it or not ;).
Bill
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I received the hydraulic filter and cat fuel filter, any tips on replacing them? I think I read somewhere not to add diesel to the filter but to use the air/water purge buttons to pull fuel in, is this correct?
What about the hydraulic filter, do I want to pour any residual fluid from the old filter into the new filter before reattaching so as not to lose any fluid or will this bring over contaminants that it had already filtered once?
I should receive the water separator filter tomorrow. May wait and do all 3 at once.
Thanks again for any info provided!
Tim & Ann
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Tim,
Cat sates that you should not pour unfiltered fuel into the center of a filter because that is supplying unfiltered fuel directly to the engine injector system. If possible, always install your fuel filters dry with a slight amount of fuel applied to the seal for lubrication. If absolutely necessary, you can pour fuel into a filter to fill it by pouring fuel very slowly into the small outer holes only. Hydraulic filters should be installed dry with a lubricated seal.
If you have a Racor air purge system, it is very easy to change fuel filters. Install both filters dry (if your are changing both), then loosen the air bleeder at the top of the secondary filter, and press the air purge button. If the purge pump stops before you get clean fuel out of the port on the top of the secondary filter, press it again. If you have never changed fuel filters on a diesel engine or if you are unsure about the procedure, get someone to walk you through the procedure. You should never introduce air into your injection system as it is difficult and sometimes expensive to get out.
Gerald
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Gerald is correct about filling a Cat fuel filter, go get a 1" 14 thread bolt 2" long put a oring around the threads and screw it into the filter mounting hole, then pout the fuel in the outside filter holes. Works great I have done this for years.
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Tim,
Cat sates that you should not pour unfiltered fuel into the center of a filter because that is supplying unfiltered fuel directly to the engine injector system. If possible, always install your fuel filters dry with a slight amount of fuel applied to the seal for lubrication. If absolutely necessary, you can pour fuel into a filter to fill it by pouring fuel very slowly into the small outer holes only. Hydraulic filters should be installed dry with a lubricated seal.
If you have a Racor air purge system, it is very easy to change fuel filters. Install both filters dry (if your are changing both), then loosen the air bleeder at the top of the secondary filter, and press the air purge button. If the purge pump stops before you get clean fuel out of the port on the top of the secondary filter, press it again. If you have never changed fuel filters on a diesel engine or if you are unsure about the procedure, get someone to walk you through the procedure. You should never introduce air into your injection system as it is difficult and sometimes expensive to get out.
Gerald
What would you lubricate the gaskets with on the hydraulic one? Just some hydraulic fluid?
Thanks,
Tim & Ann
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Tim,
As a general rule for automotive applications, you lubricate the seal on a filter with the fluid that it is filtering, but you can also use a light weight oil.
Gerald
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Well, I think I either ordered the wrong part of didn't order the parts to go with this part.
I bought a WIX Filters - 33621 since someone mentioned they liked Wix, I didn't realize it was part of an assembly, does anyone know if this is what I want and I just need to order another part, or did I order the wrong thing.
This was to be the water separator filter.
Thanks for any info.
Here is a link to what I bought.
https://www.amazon.com/gp/product/B000CSGTQO/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1
Tim & Ann
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Tim,
With your water separator, you drain the fuel out of the bottom of the plastic bowel, then unscrew the plastic bowel from the filter, then remove the filter from the base mount.
The little 1" oring goes on the threaded center base mount and the other two big Orings go on the filter, one on the top to the base and the other to the plastic bowel to the filter bottom. Lube the Orings with a bit of oil.
Going back together, screw the bowel onto the filter, fill the filter with fuel and screw it onto the base. Sometimes these can be a pain to stop them from leaking and sucking air. When you get it back together start up the Cat and watch the bowel to see if it stays full of fuel, if it starts to empty you're sucking air. Shut off the motor and tighten up the assembly some more.
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Tim,
Lee passed along some great info. Sometimes it can take two strap wrenched to both grip the filter and the bowl to allow you to hold one and tighten the other. If your parts do not look quite right and you have a Racor unit as the pre filter, they have made some changes over the years. There is a kit required to replace an older style filter that is no longer made which includes an aluminum bowl and a new filter.
http://www.parker.com/portal/site/PARKER/menuitem.de7b26ee6a659c147cf26710237ad1ca/?vgnextoid=fcc9b5bbec622110VgnVCM10000032a71dacRCRD&vgnextfmt=default&vgnextcatid=2913342&vgnextcat=RK12963+INTEGRATED+RETROFIT+KIT
It is not clear what you are working with now so I passed this info along. If I did not have the kit already and had the older Racor unit I might consider replacing the whole unit rather then spend money on the kit. Searches on the forum should have a lot of info on this subject.
Later Ed