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  1. #1
    New Member
    Join Date
    Mar 2013
    Posts
    3
    Location
    sacramento, ca
    Tractor
    Satoh s-630d

    Default Satoh 630D Bull Clutch Stuck

    I am having issues with my Satoh 630-D Bull clutch. The tractor has ran just fine since I've owned it the past year until this last week. It appears the clutch is "stuck" enaged to the flywheel. It only sat a few weeks between use so I find it hard to believe it rusted to the flywheel, but may have happened. It has sat longer several times until this last time, but maybe the moisture level was just right. I've tried all the tricks to jar it loose with no success. I've tried dragging implements, skidding tires with clutch pedal depressed etc. I'm running out of ideas before I split the tractor and see what's going on. I've even disconnected the clutch linkage and manually tried to force the clutch arm further than the linkage does in normal use to put more pressure on the pressure plate, no success.

    Has anyone else had similar issues that wasn't a result of a rusted clutch? I'm a fairly experienced mechanical guy, but could be overlooking something. It just seems odd that it would rust that bad in just a couple of weeks. When I start it in gear and drive it, it works fine, I just can't switch gears, or engage gears while its running, it must be shifted while not running, then started in gear to move it.

    I'm open to suggestions before I split it. Thanks.

  2. #2
    Silver Member
    Join Date
    May 2009
    Posts
    149
    Location
    Central Illinois
    Tractor
    several kinds and sizes

    Default Re: Satoh 630D Bull Clutch Stuck

    Can you see/feel the throwout bearing??---could have gone out on you and not working the pressure plate.
    cross shaft sheared a key??just a couple more things to check before the split! thanks; sonny580

  3. #3
    New Member
    Join Date
    Mar 2013
    Posts
    3
    Location
    sacramento, ca
    Tractor
    Satoh s-630d

    Default Re: Satoh 630D Bull Clutch Stuck

    Unfortunately, the flywheel inspection access is limited and only allows limited view of the engine side of the flywheel. I contimplated drilling an access hole through the bell housing to try and gain some visibility of the bearing, not sure I want to do that though. Regarding your reference to the "cross shaft," are you speaking of the shaft that rotates via the clutch linkage and appears to act as a clutch fork would on a auto clutch system. If so, I'm not familiar with how the internal mechanisms are in the bell housing. I have not seen an exploded view or actual. Is there a woodruff key that could have sheared?

    Lastly, I read a post somewhere that said if it was a froze flywheel due to rust, that it could be broke loose by running the PTO and activating the clutch. Have you heard of that? I'm pretty good with auto's and equipment, but not real experienced with this tractor as of yet. I guess I'll be getting aquainted soon.

    Thanks again, let me know what you think.

  4. #4
    New Member
    Join Date
    Mar 2013
    Posts
    3
    Location
    sacramento, ca
    Tractor
    Satoh s-630d

    Default Re: Satoh 630D Bull Clutch Stuck

    I just broke it loose. Re-tried the PTO cycling, then put in 1st gear and rocked rears tires again...popped loose finally. Happy day. Thanks Sonny for the reply.

  5. #5
    Bronze Member
    Join Date
    Sep 2012
    Posts
    50
    Location
    Denham Springs, La
    Tractor
    Mitlubishi D2350

    Default Re: Satoh 630D Bull Clutch Stuck

    Glad you got it freed up. Make sure you block the pedal down when the tractor's not in use.

    Cecil

  6. #6
    Member
    Join Date
    Jul 2012
    Posts
    25
    Location
    escalon, ca
    Tractor
    43 Ford 9N, 08 craftsman 48in. lawn mower, Mitsubishi s-630 d

    Default Re: Satoh 630D Bull Clutch Stuck

    glad you got it lose, my tractor wasn't so lucky the clutch was rusted in place win we got it. you were vary lucky.

  7. #7
    New Member
    Join Date
    Mar 2011
    Posts
    24
    Tractor
    Satoh S-650 (T.S.No 305206)

    Default Re: Satoh 630D Bull Clutch Stuck

    Quote Originally Posted by smithbrl View Post
    Glad you got it freed up. Make sure you block the pedal down when the tractor's not in use.

    Cecil
    Hi smithbrl,
    What exactly do you mean by "block the pedal down"? put a cinder block on the clutch pedal? Is it best to do this instead of just leaving it rest in the "normal" off state?

    Thanks,
    Raf

  8. #8
    New Member
    Join Date
    Jun 2012
    Posts
    7
    Location
    Ithaca NY
    Tractor
    Satoh Bull S630D

    Default Re: Satoh 630D Bull Clutch Stuck

    My Bull did the same thing, and I managed to get it to free up after a run on the road with clutch in, luckily. The Bull has (or at least mine does) a rod to flip and hold the clutch depressed. I have always wondered what this was for, thought maybe for added safety or for use of some implement requiring the thing to be stationary, but after mine did this to me I wonder if it is so you Can keep the clutch disengaged during periods of unuse? Seems like the throw-out bearing would not want to be under pressure all the time, but it beats having a severly stuck flywheel to the clutch!

  9. #9
    Silver Member evan price's Avatar
    Join Date
    May 2011
    Posts
    125
    Location
    Radnor, Ohio
    Tractor
    Satoh S470 Buck

    Default Re: Satoh 630D Bull Clutch Stuck

    If the motor is not running, leaving the clutch pushed in won't hurt the bearing, it's designed for the load.
    Sic Gorgiamus Allos Subjectatos Nunc


    Woods Equipment Co. - FREE online download of manuals:
    http://www.woodsonline.com/manuals.aspx

  10. #10
    Bronze Member
    Join Date
    Sep 2012
    Posts
    50
    Location
    Denham Springs, La
    Tractor
    Mitlubishi D2350

    Default Re: Satoh 630D Bull Clutch Stuck

    Quote Originally Posted by Green Acres rAf View Post
    Hi smithbrl,
    What exactly do you mean by "block the pedal down"? put a cinder block on the clutch pedal? Is it best to do this instead of just leaving it rest in the "normal" off state?

    Thanks,
    Raf
    Hi Raf

    The easiest thing to do if you don't have the rod motomedic mentioned is get a short 2x4 or 4x4. Press down on the clutch pedal and place the board between the clutch pedal shaft and the foot board. That will keep the pedal from coming up and engaging the clutch. The plates will stay separated and will not be able to rust together.

    I had to manufacture a rod for mine. It doesn't work as well as I want it to so while I'm fixing that up I use the 2x4 method.

    Cecil

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