On Sat, 05 Feb 2005 17:11:45 -0800, Eric R Snow
wrote:


That's interesting, about using grade 8 bolts for shear pins. I wonder
how much different the shear strength is from grade 8 compared to
grade 5. On my old Ford 9N is an adapter on the PTO that has a ratchet
in it so the bush hog doesn't power the tractor when it's throttled
down. This device has in it a shear pin. When it broke the first time
I was surprised to see that it uses a roll pin, not a soft steel or
brass pin. Which real nice because it doesn't smear and jam up the
thing.

I presume that my slasher is what you Americans call a bush
hog. Mine does not have shear pins to break, it has a spring
loaded clutch. I was clearing a fire break for the local council
and hit a mostly buried Foulcan diff/rear axle. Blade stopped dead,
clutch slipping madly, until I raised the 3PL, moved forward to clear
the diff, then dropped the slasher and continued with the job. 15mm
thick blade had a big dent in it!

Alan
in beautiful Golden Bay, Western Oz, South 32.25.42, East 115.45.44 GMT+8
VK6 YAB ICQ 6581610 to reply, change oz to au in address