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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 vibrations stops
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.
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Your lawn tractor will have a lever that raises and lowers the mower deck which houses the two cutting blades. By lowering your mower deck to the desired cutting height, the blades should automatically engage. By raising the deck back to it's highest position, the blades will automatically disengage. Should be simple enough. You can consult your mower manual. If you don't have one, you can easily find it online using the make, model and year of the lawn tractor.
how hard does it shake? and does it mow?
most lawn tractor will shake a quick almost violent shake at first then it should vibrate quite a bit more while you are mowing this is just caused by the power being pulled from the motor to power not only the drive but the mowing deck. its normal.
if its worse than what i described you may have a bigger problem, if there is excessive clanking from the deck your blade may be loose/installed upside down.
This can be due to a belt slipping or a bad spindle bearing.
And on the difficulty scale,10 being extremely difficult, The belt would be a 1 or 2 and the spindle about 6 or 7 (because the deck usually needs removed for this job)
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