B7200 Rc60-72h blade problem

[Freeman51b]

I am wondering if the blade bolts are right or left handed thread. I was mowing the other day and my middle blade loosened up.

 

[85Hokie]

If I am not mistaken, they are right handed - if a blade where to "hit" something firm, it would not loosen - make sure your large washers are on correctly - concave towards blade - or "hump" to the nut

 

[D2Cat]

85Hokie, I like that. Need to write a song...

Righty Tighty,
Lefty Loosey,
Hump to the Nut.....

You get the next stanza

 

[85Hokie]

Righty Tighty,
Lefty Loosey,
Hump to the Nut.....
Ifn your nuts arent tight
Your MMM aint right
and thats a sad sight!