Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  
stevenj

Sunstar Mower Deck Driveshaft Removal

Recommended Posts

stevenj
I need to replace the seal on the input shaft for the mower deck gearbox. I removed the through bolt on the u-joint yoke and the set screw is already missing. I tried driving a cold chisel between the gear box and the yoke but it won't budge. I don't see any way to use a puller unless I disassemble the u-joint. Any suggestions on how to remove the driveshaft from the gear box input shaft? Is there a woodruff key on the shaft or does the through bolt react the torque?

Share this post


Link to post
Share on other sites
UCD
In the owners manual and parts manual it looks like there is a grease fitting in the end of the yoke. If that is the case use a grease gun squirting grease into the yoke hydraulicking it off. Otherwise you will have to use a hammer and drift tapping your way around the shaft on the yoke collar to loosen it and drive it off.

Share this post


Link to post
Share on other sites
WITom
The grease zerk is to grease the u-joint itself. I guess, if it were me, I'd start by squirting WD-40 on it a few times a day for a couple of days, letting it work it's way in. If that doesn't work, you might try heating it - your gearbox seal is out anyhow, but this won't be too good on the u-joint. Another idea - take the cover off of the gearbox and see if you can get the gear off the shaft. Pull the shaft out, replace the seal, slide the shaft back in and put the gear back on. Don't know if that will work - never had one apart. Let us know what you end up doing - may need to know someday if I have a seal go bad on mine! :)

Share this post


Link to post
Share on other sites
WITom
UCD - If you are talking about the thing just to the right of the longer red line you added to the diagram, that is a bolt that holds the driveshaft onto the gearbox shaft. I just checked my parts diagram and it shows that bolt as well as a set screw - no grease fitting.

Share this post


Link to post
Share on other sites
rsachs
If you can't wedge anything in between the yoke and gearbox, could you put a clamp of some type (C or bar clamp) on the yoke and leverage between the clamp and gearbox with a block of wood and pry bar? Is there enough room to get a jack in there to work as a spreader? Just enough to back it off and then use the points UCD indicated in the diagram above.

Share this post


Link to post
Share on other sites
powerking_one
Steve, If you can get the u-joint out of the yokes, I would use a small diameter bearing separator(type used to remove tapered roller bearings from shafts) between the case and input yoke half; then use it with a gear puller. Trying to pry against the yoke/ input shaft housing might damage the oil seal flange area. Tom(PK)

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  

  • Who's Online (See full list)

    • Mach1martysr
    • BruceH
    • FloridaRich
    • MRR
    • abu507
    • BLT
    • Brettw
    • Bill725
  • Today's Birthdays

    1. Andust
      Andust
    2. Noly
      Noly
      (69 years old)
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      Paul
       
      · 8 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      Josh
       
      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts

×