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  1. #11
    Elite Member teg's Avatar
    Join Date
    Jul 2005
    Posts
    4,659
    Location
    Raleigh, NC Hillsville, VA
    Tractor
    L2800 - HST

    Default Re: L3800 50 hour service

    Quote Originally Posted by Tibbits View Post
    ...thanks to this site , changing the filter without changing fluid was clean...due to the 'shop vac' method with a wife...
    Just a thought about the shop vac method... could that suck metal back into the system vs. losing a quart/gallon just quickly swapping filters???

  2. #12
    Platinum Member KYDan's Avatar
    Join Date
    Sep 2011
    Posts
    768
    Location
    Frankfort, KY
    Tractor
    Kubota MX5100 HST 4WD

    Default Re: L3800 50 hour service

    Quote Originally Posted by teg View Post
    Just a thought about the shop vac method... could that suck metal back into the system vs. losing a quart/gallon just quickly swapping filters???
    I don't know I have never tried it. The 50 hour services are the only times I have changed the filter without draining the system and replacing the fluid as well. I did notice that the fluid at the 50 hour service appeared clean a fresh.

  3. #13
    Bronze Member
    Join Date
    May 2010
    Posts
    90

    Default Re: L3800 50 hour service

    My m7040 (purchased this summer) manual called for 50 hour oil and hydraulic/transmission changes. There were spiral filings left over from manufacturing on the magnetic filters, so probably good to change the fluid too. Trying to see if I can recycle the fluid for wood siding stain or something...

  4. #14
    Silver Member
    Join Date
    Apr 2011
    Posts
    148
    Location
    Central Massachusetts
    Tractor
    L3800 HST

    Default Re: L3800 50 hour service

    I didn't try the vac method, I didn't understand how the vac running at the fill spout could actually keep the fluid from flowing out when I removed the filter (still don't for that matter). All I could picture was my shop vac somehow sucking in gallons of hyd. fluid so I went the messy route instead.
    L3800 HST, Landpride 72" rotary cutter, Wallenstein BX42 chipper, FEL, BH77, 42" pallet forks

  5. #15
    Silver Member ritschner's Avatar
    Join Date
    Aug 2010
    Posts
    166
    Location
    Burnet, TX
    Tractor
    Kubota L2800 HST

    Default Re: L3800 50 hour service

    The shop vac method works! It creates enough vacuum to keep the fairly viscous hydraulic fluid (compare to water or fuel) from flowing out of the filter assembly. You have to remember that the filter assembly does not open directly to the transmission case, but travels through some lines and assemblies. It is sort of like sucking water up and holding it in a straw before you blew it on your siblings as a child. Also the fluid level is low enough that it is nowhere the intake of the shopvac.
    2007 L2800HST, R4's, Rear 3-Point Lever, LA463 FEL W/Shortened Loader lever, Rhino 160 mower, Armstrong Ag box blade, Armstrong Ag rake, Woods RD72 Mower

  6. #16
    Epic Contributor k0ua's Avatar
    Join Date
    Jun 2009
    Posts
    21,440
    Location
    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: L3800 50 hour service

    Quote Originally Posted by ritschner View Post
    The shop vac method works! It creates enough vacuum to keep the fairly viscous hydraulic fluid (compare to water or fuel) from flowing out of the filter assembly. You have to remember that the filter assembly does not open directly to the transmission case, but travels through some lines and assemblies. It is sort of like sucking water up and holding it in a straw before you blew it on your siblings as a child. Also the fluid level is low enough that it is nowhere the intake of the shopvac.

    Yes it does work, but there will be a little fluid sucked up, I think it is due to the air bubbles being sucked in at the filter location and traveling thru the fluid and bursting at the top of the fluid and then a little of the fluid (spray) becoming airborne and being sucked up in to the vacuum. We are talking about a coating of fluid here not an appreciable amount. One other method I was told would work, but haven't tried it was to park parallel on a steep slope with the filter uphill. The idea is the fluid will run away from the filter opening.

    James K0UA
    Last edited by k0ua; 01-01-2012 at 11:00 AM.
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  7. #17
    Silver Member
    Join Date
    Apr 2011
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    148
    Location
    Central Massachusetts
    Tractor
    L3800 HST

    Default Re: L3800 50 hour service

    Very good info fellas, thanks I will definitely give it a try next time the opportunity presents. It makes sense after the explanation and thinking it over a bit.
    L3800 HST, Landpride 72" rotary cutter, Wallenstein BX42 chipper, FEL, BH77, 42" pallet forks

  8. #18
    Silver Member
    Join Date
    Nov 2011
    Posts
    124

    Default Re: L3800 50 hour service

    Quick question guys:

    My L3800 HST manual says there is a transmission oil filter and a hydraulic oil filter.

    Is that the case?

    Thanks!
    Kubota L3800HST w/LA524 Loader
    Land Pride Medium-Duty Cutter (RCF 2060)
    Armstrong Box Blade (BB-05)
    Rhino Post Hole Digger (L200)

  9. #19
    Silver Member
    Join Date
    Apr 2011
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    148
    Location
    Central Massachusetts
    Tractor
    L3800 HST

    Default Re: L3800 50 hour service

    Yes, there are a total of three filters to change at the 50 hour mark (including the engine oli filter). They all look like regular car oil filters but are slightly different sizes.
    L3800 HST, Landpride 72" rotary cutter, Wallenstein BX42 chipper, FEL, BH77, 42" pallet forks

  10. #20
    Silver Member
    Join Date
    Nov 2011
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    124

    Default Re: L3800 50 hour service

    Quote Originally Posted by redsox1 View Post
    Yes, there are a total of three filters to change at the 50 hour mark (including the engine oli filter). They all look like regular car oil filters but are slightly different sizes.
    Thanks and thanks for posting what you did. Very helpful.

    Chuck
    Kubota L3800HST w/LA524 Loader
    Land Pride Medium-Duty Cutter (RCF 2060)
    Armstrong Box Blade (BB-05)
    Rhino Post Hole Digger (L200)

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