Hi all, I wondered if anyone is running the GR2846A snowblower on a GR machine? I am continually breaking shear bolts, sometimes on the auger (both sides) and sometimes on the impeller. I'll break two in the course of clearing the driveway once. The clearance between auger and casing on the left side appears to be much smaller than the clearance on the right, and I'm wondering if anyone else who has the blower could see if yours is the same? It's as if the case was not manufactured squarely, and there does not appear to be any adjustment as the auger shaft bolts to the side of the case with three bolts and does not have slotted holes, etc. There is also a fair amount of play between the augers and the shaft - I'd say they rotate 1/4" or so with the shears installed. I'm wondering if the holes are out-of-round. The machine is very new - probably only has 20 hours of use or so. Thank you!
GR2020 / GR2120 Snowblower Question
- Thread starter geoffb1997
- Start date
You might be overtightening the shear bolts. They only should be barely snugged up. When they are installed properly, the augers will have some normal movement. Are you using the correct shear bolts purchased at the Kubota dealer?
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
The big red flag to me is the '1/4" slop between augers and shaft. The holes in auger and shaft should be good round holes just big enough to let shear bolts kinda snuggily fit in. 1/4" rotation seems waaay tooo much, though others with that blower will know.
breaking bolts may be how you're attacking the snow. if wet,heavy you have to go slow, allow blower to 'process' the current snow before ramming in more, need to 'read the snow', get a feel how it's being moved. Not all snow's created equal..could be patches of fluffy then heavy..but it all 'looks the same'.
breaking bolts may be how you're attacking the snow. if wet,heavy you have to go slow, allow blower to 'process' the current snow before ramming in more, need to 'read the snow', get a feel how it's being moved. Not all snow's created equal..could be patches of fluffy then heavy..but it all 'looks the same'.
I seriously doubt that they are rotating 1/4", but I don't doubt that there is between 1/16" - 1/8" rotation in one direction with the shear pin installed. If you were measuring the rotation at the outer edge of the auger, then it might be 1/4". Heck, if you had a larger auger, it might even be an inch or more. If there were no slack at all, then you would be fighting the machine every time you had to change a shear pin. I will leave the explanation to Greensvillejay if you don't understand this phenomenon.The big red flag to me is the '1/4" slop between augers and shaft. The holes in auger and shaft should be good round holes just big enough to let shear bolts kinda snuggily fit in. 1/4" rotation seems waaay tooo much, though others with that blower will know.
breaking bolts may be how you're attacking the snow. if wet,heavy you have to go slow, allow blower to 'process' the current snow before ramming in more, need to 'read the snow', get a feel how it's being moved. Not all snow's created equal..could be patches of fluffy then heavy..but it all 'looks the same'.
Thanks, guys - you hit the nail exactly, DustyRusty. When I said 1/4" slop, I meant if you measured it at the outside edge of the auger. When I look through the shear pin hole, it looks perfectly round. And it makes sense that any tiny bit of slop there would be greatly magnified by the time it's measured at the outside of the auger. I've been going very slowly, and I found these things that I think are helping (for the next guy to read). I made all these adjustments at the same time, so I'm not sure which had the most effect. Any idea?
- I found from this forum and eventually the manual that I had one auger reversed (they were mirror image).
- I slightly tightened the chain and lubed it well to have approximately 3/16" total play
- I am now running at slightly less than full throttle
The break rate has gone down a lot, in fact only one since I made these adjustments which I think may have been a good sized rock.
I did find a 9 ft-lb spec for the shears, and am using that, and yes the factory bolts. I'd love to get them for less than $3-4 each, though!
- I found from this forum and eventually the manual that I had one auger reversed (they were mirror image).
- I slightly tightened the chain and lubed it well to have approximately 3/16" total play
- I am now running at slightly less than full throttle
The break rate has gone down a lot, in fact only one since I made these adjustments which I think may have been a good sized rock.
I did find a 9 ft-lb spec for the shears, and am using that, and yes the factory bolts. I'd love to get them for less than $3-4 each, though!