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  1. #1
    Silver Member
    Join Date
    Nov 2011
    Posts
    233
    Tractor
    John Deere Garden Tractors

    Default S373D Clutch Problems

    Was moldboard plowing with my tractor this weekend. Clutch was acting a little touchy where it would be agressive to engage with a clunk some times.

    One time when I started it up (with clutch pedal pressed down of course) when I let the clutch off once running, it never engaged and the pedal felt like it wasn't doing anything. Per a suggestion of someone else, re-started it in gear with the clutch pedal not pressed down and it took right off moving. Pedal was noticeably harder than normal to push down but would engage and disengage the rest of the day even after another couple of shutdowns.

    It for sure was not slipping as I was pulling a 16" plow uphill and almost snuffed the engine out a few times.

    Tractor sat outside for 10-15 years before I got it in non running condition, but from the point I got it started for the first time last year till this past weekend I didnt have any clutch problems then.

    Thoughts?

    Anything I can see or lube through that little drain plug in the bellhousing?

    Was no water in there the first time I pulled it before starting the tractor. I was told the previous owner (a mitsubishi tractor dealer) had put a new clutch in it not long before it was parked, but dont know what was all replaced when they did it.
    Mitsubishi/ Satoh S-373D

    John Deere 70, 140, 332, 345, and 420 Garden Tractors and attachments, Struck MD45 Dozer

    2002 Silverado, 1950 3100 Pickup, 2002 VW Golf TDI

  2. #2
    Platinum Member
    Join Date
    Aug 2009
    Posts
    535
    Location
    Dallas Oregon
    Tractor
    Mitsubishi MT372, Ford NAA

    Default

    This is a guess but it seems like maybe the throwout bearing got held up a bit. Perhaps caught on a pressure plate spring? No way i know of to inspect it. Unless you have a bore scope camera thingy.
    Is this your first run after sitting over winter?

  3. #3
    Bronze Member
    Join Date
    Apr 2013
    Posts
    52
    Location
    Kamloops, B.C.
    Tractor
    S373-D

    Default Re: S373D Clutch Problems

    Interesting enough my S373D in in my shop in many pieces. I went to drive two nights ago and the clutch would not disengage? I dug the bucket into the ground and spun the wheels into the dirt with clutch pedal depressed, still would not disengage. I took it apart and found a lot of rust internally. I took the flywheel and pressure plate, chucked them in the lathe and went to work with 80 grit removing rust, finished off with 120 grit once down to shiny steel. While splitting the bell housing off the transmission, the water was dripping out of the case. The small rubber plug removed and had to poke a screw driver up into a lot of rusty goop to get a tablespoon or so of water out. The throw out bearing is on a sliding sleeve, it needed to be cleaned up. The radius on the throw out yoke was flattened out, gave it a fresh radius on the side of a grinding wheel. Clutch shaft cleaned up and regreased. Just going to try to get a friction disc and put it all back together.
    I think I will park the tractor under a roof from now on.

  4. #4
    Silver Member
    Join Date
    Nov 2011
    Posts
    233
    Tractor
    John Deere Garden Tractors

    Default Re: S373D Clutch Problems

    I drove it at least once this winter.

    Do you have any pictures of the disassembly. The copy of the manual I have the pictures are too black to make out any details.

    Thanks
    Mitsubishi/ Satoh S-373D

    John Deere 70, 140, 332, 345, and 420 Garden Tractors and attachments, Struck MD45 Dozer

    2002 Silverado, 1950 3100 Pickup, 2002 VW Golf TDI

  5. #5
    Silver Member
    Join Date
    Nov 2011
    Posts
    233
    Tractor
    John Deere Garden Tractors

    Default Re: S373D Clutch Problems

    I drove it at least once this winter.

    Do you have any pictures of the disassembly. The copy of the manual I have the pictures are too black to make out any details.

    Thanks
    Mitsubishi/ Satoh S-373D

    John Deere 70, 140, 332, 345, and 420 Garden Tractors and attachments, Struck MD45 Dozer

    2002 Silverado, 1950 3100 Pickup, 2002 VW Golf TDI

  6. #6
    Bronze Member
    Join Date
    Apr 2013
    Posts
    52
    Location
    Kamloops, B.C.
    Tractor
    S373-D

  7. #7
    Veteran Member
    Join Date
    Sep 2002
    Posts
    1,499
    Location
    Mt. Ulla, NC
    Tractor
    Satoh S-470D, Mitubishi FD 1450D

    Default Re: S373D Clutch Problems

    My guess is that there is some rust on the splined transmission shaft. The clutch disc is splined to this and it could be hanging up on some rust instead of sliding on the shaft. My 1450D was having similar issues with the pedal. It was making a little noise in the release bearing too. I bought a new release bearing and pilot bearing. My brother split it and had it back together before I had a chance to see the innards. The clutch was still good.

  8. #8
    Silver Member
    Join Date
    Nov 2011
    Posts
    233
    Tractor
    John Deere Garden Tractors

    Default Re: S373D Clutch Problems

    Anything I can try to lube through that drain hole?

    Kind of surprised I didnt notice it the first year I owned the tractor after it sat for 10+ years, think it would have been there right away.

    Trying to troubleshoot without splitting the tractor, but it may come to that. Not the end of the world, but just another project.
    Mitsubishi/ Satoh S-373D

    John Deere 70, 140, 332, 345, and 420 Garden Tractors and attachments, Struck MD45 Dozer

    2002 Silverado, 1950 3100 Pickup, 2002 VW Golf TDI

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