Question about Oregon Scientific Oregon Fusion Blade For 42-Inch John Deere 100 Series Lawn Mowers #491-139

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I have vibration in the deck and have checked for a warped deck, busted spindles, and bent blades

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Depending on the machine?? check or replace the cutter belt and also check the v pulleys for alignment

Posted on Jul 20, 2009

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Vibrating 38" deck on MTD yardman mower


Hi, first replace the blade spindle bearings, if you had to hit them to free them up the bearings are shot. Secondly, replace the deck belt. Because you engaged the blades with a siezed bearing the belt will have a worn section where the v will be thinner thus causing the vibration as it passes through the pulleys. Regards Phil.

Jun 19, 2012 | Mtd Garden

2 Answers

When I engage the deck to start cutting a loud noise begins and the tractor does not work. I previously hit a tree root with it's blades engaged. Can you please help? Thanks Danny


Sounds to me like you bent a spindle. Turn the mower off and get under it and see if you can spin the blades. The blades whould spin and not be wobbly. If either one of the blades are wobbly then you'll need to replace the spindle.

Also check to make the blade belt hasn't come off or is not destroyed.

Good luck!

Aug 01, 2011 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

1 Answer

Mower deck vibrations and sparks.


Hi, you have either a bent blade, bent deck or collapsed bearings in a blade spindle. Hope this helps, regards Phil.

Jul 19, 2011 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Excessive vibration when blades are engaged. No visible problems. Started after a rag wrapped around one blade.


If it started when a rag wrapped around the spindle mandrel? You may have damaged the mandrel. Check where they bolts onto the deck, if the mounts are damaged, this could give you the vibration. You could also have done something as simple as bent a blade.

May 28, 2011 | Husqvarna 23 Hp 48" Deck Yard Tractor

1 Answer

Craftsman 19.5hp 42'' deck lawn tractor with vibration only when the cutting blades are engaged.I have changed the blades but the the tractor still vibrates alittle. when I disengage the blades the...


Check your spindles, especially the shafts in the spindles. If one of them is bent, it'll make the blades vibrate as they spin. You can find replacement shafts and spindles at Partsbuggy.com.

Dec 18, 2010 | Garden

1 Answer

Mower deck shakes when PTO is engaged


An imbalance is causing your vibration. check the blades. You probably have a bent or damage blade. Could also be a bad spot on the deck belt or a damaged spindle.
Good luck.

Sep 06, 2010 | Mtd Garden

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.

Aug 25, 2010 | Craftsman Garden

3 Answers

My mowers cuts uneven I replaced the blades but it still cuts uneven how can I level it?


Park mower on a level flat surface ( a concrete garage floor is ideal ) lift deck up until you can put a piece of a 2x4 flat underneath the deck and lower deck until it just contacts the 2x4. loosen adjustment nuts or turnbuckles and adjust until the deck just starts to clear the 2x4. this should level your deck. Now , lift the deck and remove the 2x4. put blade height lever on a known cut length and with a tape measure, measure the tips of the blades from the floor to the blade tip...they should all be the same within 1/8 of an inch...if not then you either have a bent blade, bent spindle shaft, or spindle bolts are loose or misaligned. Your deck could be warped too...depending on how hard a lick it took...good luck !!! ;-D

Jun 24, 2010 | Craftsman 20 hp 42 in. Deck Lawn Tractor -...

1 Answer

Deck has vibration but not b/c of bent blades, warped deck, or busted spindles


your belt has a wore spot on it. that will cacse it to vibrate.hope this is some help

Jul 19, 2009 | John Deere &Reg Branded 27" Tractor Metal...

2 Answers

Mowes unevenly. Blades don't match up.


make sure when you replaced the spindles that you used all the washers and spacer bushings back identical to the ones you took off.
Make sure your deck isnt bent for some reason where the spindles mount and or the deck itself
level the deck when its on the mower on a level suface,side to side(level) back to front the back just a little higher than the front 3/8 inch or less
proper air pressure in all 4 tires
Also you could add a washer or take away a waher to allow the blades to become level at mid point meeting?
be sure to torque the blade bolts to 35 ft.lbs also

May 31, 2009 | Husqvarna Garden

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