Need Help w Baker Hill 5000 Xmsn

  1. Welcome to 6x6 World.

    You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

    If you have any problems with the registration process or your account login, please contact us. Looking forward to seeing you in the forums and talking about AATVs!
+ Reply to Thread
Results 1 to 6 of 6

Thread: Need Help w Baker Hill 5000 Xmsn

  1. #1
    Join Date
    Nov 2022
    Location
    San Antonio, TX
    Posts
    3

    Need Help w Baker Hill 5000 Xmsn

    Well, trying to bring my old Attex ST300 out of mothballs (been parked for about 10 yrs since original JLO 297 became hit-and-miss & finally wouldn't start at all)... Fun machine when the old 2-stroke would run, just not reliable enough now for my needs at 67 years of age, ha! So, in my infinite wisdom, I'm repowering with a new 4-stroke Predator Max 459cc motor from Harbor Freight. Took some doing, but finally got installed and engine runs great! However, after removing xmsn, flushing old fluid out (yuck - pretty filthy!) & refilling with 1 pint of fresh 80/90 gear oil, then reinstalling, I immediately noticed a MAJOR oil leak between the clutch unit and brake disc (apparently where the concentric shafts meet?). Never had an oil leak there before, but now I'm wondering if that was just because the xmsn was never properly filled before?? Anyway, I really DON'T want to tear down the xmsn if I can avoid it, so my plan right now is to just try and limp it along for awhile longer (prob only run it a few times a year with the grandkids) by changing to higher viscosity SAE 140 gear oil and adding a leather strap slinger around the shaft to control oil slinging (like the old timers, ha! - now I ARE one!!). Hoping to change the gear oil with xmsn in place, if possible, (don't wanna remove again if I can avoid it!) and wondering if the little Allen screw I noticed towards the bottom of the casing is, in fact, a drain plug of sorts? It's not exactly opposite the big Allen plug fill port (and seems pretty small for a drain, too), but not sure what else it could be?? Can anyone confirm before I remove it & see?? THANKS!

  2. #2
    Join Date
    May 2009
    Location
    NJ 08533
    Posts
    5,026
    There is a manual on the home page


    My new beer holder spilled some on the trails - in it's hair and down it's throat.
    Joe Camel never does that.

    Advice is free, it's the application that costs.

  3. #3
    Join Date
    Nov 2022
    Location
    San Antonio, TX
    Posts
    3
    Aha, thanks! Re-read the manual and believe that gave me my answer... "Oil level plug is found on side of transmission." So, apparently the SMALLER little Allen plug on the "side" of the transmission (as opposed to the LARGER fill plug on top) is actually what determines a "proper fill level" and NOT a "drain" plug of any type?? Never knew that before - Thanks!

  4. #4
    Join Date
    Jun 2011
    Location
    Western New York
    Posts
    444
    You are correct. I can’t remember if any of the ones I have are a 5000 series, but the 7000 in my 300d is the same way. I also have a leak in probably the same spot as you did and also agree it’s not worth the complete tear down for the once a year I run the machine to keep it “fresh.” I just keep a rag under the transmission and check the level before every run. Personally, I don’t mind a little fluid in the bottom of the tub..:it’s all the less likely that dirt and grime will adhere to the tub and keep it looking brand new after my “restoration.” Eventually I plan on building another one of my first gen machines and will be doing a tear down and rebuild of a 7000 for that machine. Fingers crossed it goes well.
    #1 Attex ST/300/D - "The Duck." Restoration of my family owned aatv from the early 1970's.
    #2 Attex ST/300/D - Resto/Mod project for the trails
    #3 Attex 440 Thunderchief Racer
    #4 Attex ST/400 Trail Machine

  5. #5
    Join Date
    Nov 2022
    Location
    San Antonio, TX
    Posts
    3

    Yet Another Problem... Ugh

    Well, pretty much finished the rehab just in time for Xmas so the grandkids could have some fun running it. And boy did they - had an absolute BLAST running it around for a few days and everything ran fine!!

    However, after they left to go back home, I was puttering around with it and getting it ready for winter storage again when it STUCK in forward gear - UGH... The shift lever on top now goes much more forward than usual and I now have no neutral & no reverse. My immediate suspicion is the little bronze "nubs" on the internal shifter assy have finally worn away or broken such that it won't move the shifter ring back out of forward gear. I've been worrying about that for awhile, as it would sometimes "slip" out of gear while driving and occasionally make a bad "grinding" and/or "ringing" noise like the shifter ring wasn't fully engaging/disengaging as it should. Not looking forward to it, but appears I'm gonna have to dive in there and open it up to see what's going on.

    I've got access to the Attex manual & the xmsn diagrams, but my big question for those of you who have been inside before, is "how hard is it" to just open things up & get access to the shifter fork assy inside? Can I just unbolt the center assy endcaps and get in there, or do I have to start from the outside bearings and work my way all the way in??

    Any suggestions or advice would be welcomed!! THANKS!

  6. #6
    Join Date
    May 2009
    Location
    NJ 08533
    Posts
    5,026
    You would have to start from the out side in, check the upper shifter arm didn't just spin on the shaft.


    My new beer holder spilled some on the trails - in it's hair and down it's throat.
    Joe Camel never does that.

    Advice is free, it's the application that costs.

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts