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Walk Behind Lawn Mowers

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Service & Maintenance Question

I have a Hu775h walk behind mower. On multiple occasions I...

Service & Maintenance Question posted August 19, 2016 by Robert Butts

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Question:

I have a Hu775h walk behind mower. On multiple occasions I have either broken the keyway or sheared off the star on the blade adapter. The last time I cut about 6 feet of grass and the star sheared off. I have gone through 5 OEM parts. The dealer said my blade is bad...do I need a new blade or is there a new workaround for this issue?

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Answer

- posted August 19, 2016 by Eugene Rounds
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Did torque the retaining bolt to spec or just hand tighten? 55 ft lbs is what I tighten all my customer blade bolts to.

Also the dealer could be right about the blade star is now damage too and need to be replaced.
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- posted August 19, 2016 by Robert Butts
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Thanks for your input...Hand tight with hardened washers and bolt... guess I have to borrow a torque wrench! No local dealers so I need to get adapter online. I will buy a new blade...but I fit the blade on a previous adapter where the internal keyway sheared off and there was no play between star and blade. Blade is just a little thicker then the star wasn't sure if that was an issue....
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- posted August 19, 2016 by Eugene Rounds
  
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  The blade being thicker is not an issue. I install heavier blades as my aftermarket supplier blades are always thicker.
  
  Here is a helpful tip when torquing the new blade is to use a block of wood to prevent the blade from turning while your do this.
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