JD 275 ?

Geo-TH,In · Apr 24, 2013

I purchased a used John Deere 275 with a 4 ft mower deck. The blades are new and have a round hold. Checked on ebay, the ones for the mower deck have round holes too. My question is should there be a fiber disk or something besides a flat washer to keep the blades from slipping on the spindle?
thanks,
George

JT Britt · Apr 24, 2013

Nope there is nothing between the spindle and the blade but that metal bearing guard you have pictured.

gtractorfan · Apr 25, 2013

Bought this one new about 15 years ago. Put a floor jack under the front, here's how they're bolted on. The cup shape bearing protectors drop off along with the blade on mine.

JD Seller · Apr 26, 2013

Well your question is partly wrong. That is not a flat washer. It is a cupped washer. It is a heavy banvel washer. It acts like a spring and holds the blade tight. That is why it has the two dimples/hole in the one side. That side faces out or is toward the bolt head. They do not want a splined or hex drive. This way you have impact protection. If you hit something it can slip the blade. Usually it will slip a little and tighten the blade bolt real tight. It takes a good 18 MM six point socket to get them loose. You do not have to tighten the blade bolts much over 85 ft. lbs.

gtractorfan · Apr 26, 2013

Thanks for the information. I never thought of it that the way the blades are fastened provides "slip clutch" protection but your explanation makes sense.

JD 275 ?

Geo-TH,In

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JT Britt

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gtractorfan

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JD Seller

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gtractorfan

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