Tuff Torq K46 Series overhaul

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Published 2022-08-30
In this video we fully disassemble a K46 series Tuff Torq transaxle that was reportedly not working. We repair a cracked case as well as replace all the seals on the gearbox. We show you a few tricks and tips to be successful with overhauling. The gearbox did not seem to have any damage and as far as we can determine the oil leaked out due to a cracked case.

00:00 - Introduction and preparation for teardown
01:09 - Teardown
09:14 - Cleaning the case
10:06 - Repairing the crack
11:54 - Polishing the drive shafts and cleaning the gears
12:50 - Assembly
25:46 - Bolt torques
30:16 - Oil fill levels
30:31 - Testing the gearcase
32:35 - Lawnmower running again

All Comments (21)
  • Great tutorial, thanks for taking the time to post it to the Youtube world . 😎
  • Excellent video. My yth22v46 was barely moving at just 45 hrs. So I dropped the diff to put in 5w50 synthetic. Cracked open to inspect. The inside looked great. Barely anything on any magnet. Put back in mower, purged air and still the same problem. Turns out that I had a build up crap at the clutch linkage under the pedal. Once hosed out and sprayed the linkage, it runs better than brand new.
  • @Glens1965
    Best tutorial I've seen by-far! Kudos to the camera man.
  • @LarryCook1960
    Excellent video Sir. Just the facts, good camera work, lots of details, and sensible advice. Thank you.
  • @dawghouse85
    Thank you for your knowledge. You're an amazing teacher. Covering the experience of the work and the ability to communicate it in the same. Great job. I watched your video and tackled mine today. Opened mine to find a spring that had jammed inside one of the pins in my piston pump motor. Caused the spring to break and pieces traveled through causing quite significant damage.
  • Brilliant video I’ve got a snapped axel shaft I’m hoping that now I’ve seen your video I might be able to replace it by myself I just don’t want to remove too many parts incase I forget where they go 😂
  • @HobbyMotorDK
    Great video with good details - thanks for sharing
  • Very good job and extremely helpful plus easy to follow alone with the instructions
  • I just took mine apart yesterday, thanks for the tutorial!
  • @truthof7382
    I can see why they charge so much for these trans new. Wish they still made manual gear units. Thank you for posting.
  • @MrSFSTUDIOS
    Great work! Next time I service mine, I will take the lower case off and clean those lower magnets.
  • @stevepifer7582
    A few years ago I worked on one of these when I got ready to install the motor I made some alinement studs out of some bolts made putting the motor back a whole easier it is talked about around 23:35 very good video BTW
  • @ColinWatters
    Mine started slipping and whining after about 450 hours. The fill cap on the top had split and the oil was like chocolate milk. Getting one of the wheel hubs off the axle proved impossible but if you are opening the transmission it is not necessary to remove the hub to replace the axle seals. You can take the axle out, fit new seal and put the axle back in. I Replaced the axle seals and fill cap and resealed it up. I regret not stripping down the oil pump and motors to check for wear but it seems to work ok with new oil.