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Blade doesn't stay straight. bent spindle?

Blade doesn't stay straight. I tried 3 different blades. could it be a bent spindle? or an adjustment?

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If the blade is mounted on the motor shaft? if it is, then you need to replace the motor bearing.

Posted on Apr 13, 2009

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First is being sure all your tires have proper air pressure and you don't have a bent blade. Then while parked on flat concrete and both outside blades at 3 and 9 o'clock measure blade height far left side of deck and far right side and compare. I there is a difference the entire deck is out of level and should be adjusted. Then remove the blade drive belt from one of the pulleys so everything is slacked. Grab each blade and see if it wobbles or has excessive play and check the spindle housings for cracks or breaks. If you find a housing with wobble or play the bearings in that spindle are shot ( this is a lot harder to detect with the belt tension on the pulleys) and should be replaced. If you find a broke or cracked housing the housing will need to be replaced. Either one of these situations may not be obvious with the mower at rest but the blade will wobble at speed causing uneven cuts.

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I suggest that you should remove deck, turn upside down and place straight edge or tight string line over blades from outer edges of deck frame. Use the guide strips to get even measurement. Rotate blades and measure distance from straight edge to tips at both sides. they should be the same. If there is difference from one side to the other, either the blades are bent, or if each blade is same at each end but not aligned in centre (difference in height) then the spindles need packing to make them even. Check that bearings are not loose. If you do not understand this best to take it to service centre.

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1 Answer

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Could be bent Spindles. Easiest way is to mark on deck where point of blade is and rotate blade around if both ends don't match mark on deck highly likely bent blade or spindle. Id say bent blade more likely.

In my experience Gator blades in general work fantastic.

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My 42 inch Toro seems to be cutting unevenly. The blades seem to be on correctly and I hope I haven't hit something to set the angle wrong


First thing to check is that the deck is level by the adjustments on wheels. Then check the bearings in the spindle housings and there is no play in the shaft when you try to move blade up and down. You then can measure from the blade tip bottom of deck on both sides (3 o'clock and 9 o'clock, and then 12 o'clock and 6'o clock They should all be the same. If not then either the shaft is bent, or the deck is bent slightly causing the blade not being parallel to the deck. If you have someone rotate the shaft you should be able to tell if the shaft is bent or not. If the deck is bent, then you will have to straighten it out till the spindle shaft is perpendicular to deck.

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1 Answer

The accelerator pedal is not working properly. Especially when trying to go up hill. I have to keep pushing & letting go, pushing & letting go. even when it starts to move. Also, the right blade...


Hello,

I am guessing that this was posted in wrong category.

You mention that you have to keep pushing / letting go of the accelerator. Is the engine RPM changing, or is the tractor surging, when you do this? What happens if you keep a steady pressure on the pedal? Isn't the throttle control via a lever on the panel?

Your uneven blade height can be caused by a multitude of issues.
1) If the spindles were changed, the wrong spindle may have been used on one side or the other.
2) The wrong blade adapter has been used on one of the spindles.
3) Mower deck has been bent
4) Mower deck is binding. Try raising it all the way up, and lowering all the way down. See if the uneven cut changes at both levels (all up or all down).
5) Blade is bent on one side, though this would usually cause such a ruckus and vibration it would be quite noticeable.
6) Belt is slipping. Yes, sounds strange, but if blade speed changes significantly, then the position where the grass is actually cut changes because the grass can "lean over" more.
7) Using a mulching attachment in tall grass can cause 1 blade to clog, and the cut grass that is swirling bends over other grass that needs to be cut.
8) Mower deck support bracket has been bent
9) Mower deck wheel has a bad bearing, and doesn't support the deck at same height as other side.
10) Mower deck is cracked / bent at a support location
11) You have lost a retaining pin at a support bracket and the bracket is loose.
12) A spindle's bearings are worn out, and the spindle is "jumping" as it turns.

If the blades are directly beside each other where they blades will overlap, it is normal for a small amount of height difference to occur. But, most decks have off set blades, one slightly in front of the other.

you should be able to raise the deck all the way, and pull the tractor's front wheels up onto something (landscape timber?) to get more access, then measure blade height in relation to bottom of the deck. If different, then you are looking at wrong blade / adapter or a spindle issue. If the blades are the same height, then you are likely looking at a deck support issue / binding in linkage.

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1 Answer

I have a troy bilt riding lawn mover, it cuts the grass uneven, changed blades thinking it was the problem, but it wasn't. do they have any kind of adjustments for the blades?


The best bet is to work on the deck with it removed from the tractor. You may find the bearings are out in one of the spindles. Quite often someone hits something and the deck housing is bent where the spindle bolts to it. Use a tape measure and measure the distance from the deck to the blade. Compare the two spindles (3 if it's 3 blades) . You'll find one spindle is tilted so that it is not 90 degree to the deck. What I do is once I've located the offending spindle, and which direction it is tilted, I remove the blade, slide a piece of pipe about 4' long over the spindle (usually 1-1/2 or 2" pipe) so it clears the hub and bend it. Then I reinstall the blade and measure it again.

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1 Answer

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try checking to see if perhaps the blade is bent if not blade maybe the spindle or possibly the bearings are bad on the spindles causing them to not run true, also are all tires inflated properly good luck

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The first thing to check is your blades. If one is bent, it will never cut even. It happens a lot hitting roots, antbeds, etc. Mulching blades will bend easier than a straight blade. It's best to take them off and lay one on top of the other to see if they're bent.

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