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  1. #1
    Super Member Scooby074's Avatar
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    Nova Scotia
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    BX 25, ZD 326

    Default Adding a Spin on Racor filter to a BX25

    I just went through the process of adding a proper spin on filter to my BX. As you may or may not be aware, the factory filters are in line, plastic jobbies that are more fitting on a snowmobile than a tractor.

    Recently I've been having fueling issues where the tractor would stall out /not start when the temperature was below freezing, this was even with fuel treated with PS White and Diesel911. I originally thought I was having an issue with my lift pump http://www.tractorbynet.com/forums/k...p-failure.html, but now believe my issues were from the primary fuel filter freezing.

    So it was time to add a decent, spin-on type filter, both for increased dirt removal and hopefully to drop out any water that may be in the fuel. The one I chose was the Racor 120a with the 2 micron filter.Its a very common filter in both marine and small engine circles. 15GPH flow, so more than enough flow for the tiny BX. The Racor element at 2 micron will do a good job of removing any free water that may be in the fuel, plus the clear sediment bowl will allow me to check on my fuel's condition visually.

    My original plan was to put the filter just before the injection pump after the lift pump because of ease of installation. I called Racor's tech line (excellent service. fast and friendly, BTW !!) to see if this was a good idea because the instructions said it should be on the suction side only. I was told that with the 2micron filter, it would work but not at peak efficiency because the lift pump would emulsify the water. This would defeat the purpose, so it had to be plumbed before the lift pump.

    So where to put it? On these small tractors there is NOT much room anywheres to add a filter. Some have suggested mounting to the ROPS.... Not a very pretty install, plus its uphill from the tank.. Let alone the fact that because of the backhoe, I'd regularly be running into it while operating and getting on and off. Others have suggested behind the front push bar. Not great because I'm regularly deep into dirt and gravel piles in the summer and given the scratches and chips in the paint, any filter there is sure to be destroyed.

    That leaves between the front axle and the loader mounts. On larger tractors this is a common area to see filters so why not on the BX? Plus it made plumbing and installation easy.

    First I pulled the 2 front bolts for the loader mounting arms and measured bolt spacing. I also measured for what rear offset I could use so as to tuck the filter as close to the round loader mounts as possible for protection yet still be able to service the filter easily. I think the offset ended up around 4" from the front of the loader mounting plate and kicked out about 3/4" from the tractor frame to allow clearance for the loader bolt heads and future service :



    Then I fabricated and painted the mount to hold the filter. Its made out of 1.5"x 1/4" flatbar. Its just a basic L shape. The horizontal part of the L is kicked towards the camera about 3/4" in this pic. Paint is facroty Kubota Rops Gray. Fittings are brass 1/4NPTx5/16 barb.



    Now onto the plumbing.

    All hoses are 5/16 Dayco hose made in USA. It cost more than the china low pressure hose ($4.25/ft vs $2.00) but it was worth the added expense in my book. Even though there is a factory filter between the injection pump and this hose, I didnt chance it. All hose was run in loom for abrasion protection.

    First I pulled out the existing fuel filter and spliced into the line from the tank. I debated on running new line, but it was overkill for the amount of work required in my opinion. In this picture, the factory filter has already been removed from its location and the splice coupler installed. Also notice that my hydrostatic fan has all its blades The new factory skidplate seems to work, even considering its small size.



    Then I ran the line from the new filter to the pump inlet. Notice that both the filter supply and return are ran above the gray plate. The drive shaft is also ran there ( gray tube in the upper right with the yellow sticker). This is a bit of a concern, but I made an effort to pull and cable tie both the new lines away from the rotating shaft. There is about 1" at the minimum between the new lines and the shaft, lots of clearance.



    This is where both lines come over the frame and go to the filter (on left). There is a set of rigid hydraulic lines there (silver, on right). I came out over top of them and under the floor and cable tied the new lines tight. No shutoff valves were used before or after the filter, they really arent needed.



    The finished install. I debated on whether to put a guard around the filter to protect it, but figured the axle would deflect most brush, plus I wanted it to be easy to service.. If I notice the filter getting wacked, I'll add a guard later.



    This wasnt a hard job, but it took time, mostly to figure out where to put the filter and how to plumb it. I think I mocked up every possible location for this, from above the mower deck area to mounting on the ROPS and all places in between. Hopefully this will save somebody some time if they choose to add a filter later.

    Fuel flow was noticeably improved compared to the factory inline. Where it used to be a stream, it's now a river. The whole fuel line is full of fuel.

    Cost wise, I figure it $150-200. Money well spent for cleaner fuel and (hopefully) reduced water getting to the injectors and filter freezing.

  2. #2
    Elite Member dodge man's Avatar
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    Oct 2008
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    4,166
    Location
    West central Illinois
    Tractor
    Kubota BX2350

    Default Re: Adding a Spin on Racor filter to a BX25

    Nice install. I've also had fuel problems on my Bx a couple of times, but I was never sure what the problem was, I suspect the same thing you had happen.
    Dave,
    BX2350

  3. #3
    Veteran Member GolfAddict's Avatar
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    Oct 2011
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    2,277
    Location
    SE Minnesota
    Tractor
    Kubota BX24; John Deere 4020

    Default Re: Adding a Spin on Racor filter to a BX25

    Yes, very nice install. Did you eliminate the second filter up above or leave that?

  4. #4
    Super Member Scooby074's Avatar
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    BX 25, ZD 326

    Default Re: Adding a Spin on Racor filter to a BX25

    Quote Originally Posted by dodge man View Post
    Nice install. I've also had fuel problems on my Bx a couple of times, but I was never sure what the problem was, I suspect the same thing you had happen.
    Its hard to say really. Im just going by my gut feelings. Im 99% sure my problem was frozen filter related, however I was talking to the head mechanic at the dealer today and there has been some issues with the lift pumps on BX's. However when they go, he said they usually just stop working and dont restart. He agreed with me that it likely was/is a freezing/gelling issue with the primary filter, due mostly to it happening when the weather gets real cold.


    As another defense against the recent cold, I installed a block heater in the tractor this evening. I didnt document it, but it was a pretty straight forward install.

  5. #5
    Super Member 94BULLITT's Avatar
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    Frederick County, VA
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    Kubota BX2360 & L4240 HSTC

    Default Re: Adding a Spin on Racor filter to a BX25

    Quote Originally Posted by Scooby074 View Post
    Its hard to say really. Im just going by my gut feelings. Im 99% sure my problem was frozen filter related, however I was talking to the head mechanic at the dealer today and there has been some issues with the lift pumps on BX's. However when they go, he said they usually just stop working and dont restart. He agreed with me that it likely was/is a freezing/gelling issue with the primary filter, due mostly to it happening when the weather gets real cold.


    As another defense against the recent cold, I installed a block heater in the tractor this evening. I didnt document it, but it was a pretty straight forward install.
    Did the block heater go in a freeze plug?

  6. #6
    Super Member Scooby074's Avatar
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    BX 25, ZD 326

    Default Re: Adding a Spin on Racor filter to a BX25

    Quote Originally Posted by 94BULLITT View Post
    Did the block heater go in a freeze plug?
    Yes. It pounds into the first freeze plug hole on the injection pump side. Its a super easy install, like 30 - 45 minutes at most. I'll see if I can grab a pic without having to strip the front clip off the tractor.

  7. #7
    Super Member 94BULLITT's Avatar
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    Kubota BX2360 & L4240 HSTC

    Default Re: Adding a Spin on Racor filter to a BX25

    Quote Originally Posted by Scooby074 View Post
    Yes. It pounds into the first freeze plug hole on the injection pump side. Its a super easy install, like 30 - 45 minutes at most. I'll see if I can grab a pic without having to strip the front clip off the tractor.
    I know where you are talking about, the left side of the block. You don't have to worry about a picture, I was just wondering where it went.

  8. #8
    Super Member Scooby074's Avatar
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    BX 25, ZD 326

    Default Re: Adding a Spin on Racor filter to a BX25

    Quote Originally Posted by 94BULLITT View Post
    I know where you are talking about, the left side of the block. You don't have to worry about a picture, I was just wondering where it went.
    No worries. I might still try and grab a pic or two and make an install thread for future reference, it may come in handy for somebody down the line.

    Never fails though... We were -17.2*C @ 01:38 this morning... now we're -0.7*C. How much you want to bet we don't see any more cold temps for the rest of the winter now that I got a block heater

  9. #9
    Super Member 94BULLITT's Avatar
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    Default Re: Adding a Spin on Racor filter to a BX25

    Quote Originally Posted by Scooby074 View Post
    No worries. I might still try and grab a pic or two and make an install thread for future reference, it may come in handy for somebody down the line.

    Never fails though... We were -17.2*C @ 01:38 this morning... now we're -0.7*C. How much you want to bet we don't see any more cold temps for the rest of the winter now that I got a block heater
    I am not taking that bet. We might hit 63* here Saturday yesterday they said it would be 60* on Saturday The warm weather helps out on the firewood.

  10. #10
    Super Member Scooby074's Avatar
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    BX 25, ZD 326

    Default Re: Adding a Spin on Racor filter to a BX25

    63* ! Thats down right tropical!

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