My Sears 1000 XLT tractor is driving absloulutely nuts . The pulley
that drives the left side blade keeps stripping. The pulley is
attached to it's shaft with a star connection. If I hit a root or
stick or for whatever season the blade is stopped the belt will keep
the pulley spinning and the connection is destroyed. The star opening
on the pulley gets every so slightly stripped and enlarged and begins
to saw away at the spindle destroying both within seconds. This
happens only on the left blade, never on the right. To replace the
pulley and spindle costs me about $60 each time. so far in the two
years that I have owned time machine this happened 4 times! Can anyone
tell me what going wrong ?
Sounds like you're hitting stuff that shouldn't be. _Something_ is
going to give if you hit something solid enough to stop the blade while
the drive is engaged. Don't know what you expect to happen???
On Nov 30, 12:43 pm, email@example.com wrote:
I'm not going to disagree with sa or dpb, but I'll admit that it does
sound strange that if an obstacle is what is causing the problem, you
somehow managed to hit it (or them) with the left blade 4 times and
never with the right.
Is the left blade closer to the ground? Do you always (typically?)
follow the exact same route such that the left blade meets the
obstacle but the right never does?
Obviously clearing all obstacles is the first thing you need to deal
with, but I would also try to determine what is different about the
left side blade vs. the right - either its position on the tractor or
the route it travels when you mow.
I'm not taking offense as you don't intend to be critical I understand,
but I'll add a little note... :)
He says the blade is stopped by an obstruction while in gear.
If there is something other than an external cause, that would be a
fault that could be addressed mechanically otherwise nothing but
changing the operation would seem to address the problem.
I do suppose the chance of the leveling could be a contributing issue,
but if it is so bad as to cause the left side to be digging in to the
point it stops a blade tip and the right not, one would think the
unevenness of the cut would be obvious enough to be noted.
I think we are on the same page here. That's why I mentioned both the
position of the blade and the route taken.
Let's put a root out in the middle of his yard. Now let's assume his
left ball...err...blade hangs lower than his right. If he travels a
route than continually takes his left one over the roots, he going to
smack it everytime he goes by (ouch!). However, if he varies his
route a little to one side, the right one might clear it.
This could happen due to uneveness of turf, a physically lower
left ... blade, or even a left blade that is bent differently than the
Original poster here:
Thanks for all the replys. I have done quite a bit of root removal and
I ry to be careful.It's never going to be completely pristine yard
though . But it seems to me the trackor should be able to take a bit
My old Wheel Horse which was a third the price would hit obsructions
too but in that case the belt would slip an I would see and smell it
burn. I'd stop without much damage
being done . I think I must be missing something. The belt is not all
tight, the pulley was bolted down very well and still I'm broken down
for god knows how long. I question is , has anyone had this happen to
them as well ? Is there a design problem?
Are there shear pins somewhere on the drivelines to the blades? If there
are, I would be that the left one isn't a shear pin but rather an ordinary
bolt or the shaft is frozen in place perhaps through corrosion.
The machine is meant for cutting grass....not punishment.
I wonder if the deck is designed in such a way that if the right blade hits a
loose object it gets
deflected or ejected thru the chute, but when the left one hits something it
gets wedged and stops
Despite what others say, it should be able to stop momentarily without
destroying anything. I hit lots of things (rather rough ground in
places), and I've never had any damage (except for the blade getting
dinged of course).
Can you slacken off the belt a bit so it'll slip? Maybe it's too tight.
Age and Treachery will Triumph over Youth and Skill
That would be "shear", curtains are "sheer"... :)
If there were one, certainly one would expect that to occur. Many
cheapies don't. I wouldn't expect to hit anything so hard so frequent
as to stop a blade entirely dead w/o causing damage.
Not sure what OP is calling a "star" drive -- could be that it's failing
there because it was designed as the weak point. The JD's I have use a
keyed shaft and the key serves the function of the shear pin.
Whatever it is, I still say the solution is most likely the answer to
the old story about the doctor's solution to the complaint "It hurts
The end of the mandrel is shaped rather like an asterisk. It's maybe
3/4 - 1" in diameter and the blade has a matching hole that fits over
it. Belt turns pully, pully turns mandrel, mandrel (star) turns
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