Do I need a slip clutch?

[workmytractor]

2$ yikes.. are your shear bolts / pins something special that you can't use a soft grade 2 bolt in place of.. 2$ buys alot of grade 2 bolts!

soundguy

OK...I guess I was a little off on my price. $0.70 a piece at lowes for 1/2 x 3" cheapies. Still though, shearing a few bolts per job plus time spent swapping pins and a slip clutch could be paid for in no time. I still use shear pins though

 

[spruce Deere]

2$ yikes.. are your shear bolts / pins something special that you can't use a soft grade 2 bolt in place of.. 2$ buys alot of grade 2 bolts!

soundguy

The shear bolt for the 403 is a 8.8 grade M8x45. I thought it was a soft grade 2 till, well you know Dont remember the cost it was less than a dollar at the napa for bolt, nut.

 

[greg_g]

The shear bolt for the 403 is a 8.8 grade M8x45.

You may already know this, but a metric grade 8.8 is the equivalent of our SAE Grade5. But 45mm sounds kinda short for a shear bolt, that's barely an inch and three quarters.
//greg//

 

[Soundguy]

sounds like it may be a flange style shear bolt vs one that is thru a shaft and collar.

soundguy

 

[Soundguy]

OK...I guess I was a little off on my price. $0.70 a piece at lowes for 1/2 x 3" cheapies. Still though, shearing a few bolts per job plus time spent swapping pins and a slip clutch could be paid for in no time. I still use shear pins though

no argument.. the slip clutch is more desireable.

the cost of the shear bolt itself is nothing compaired to the cost of the downtime replacing the darn thing..

soundguy

 

[JoeinTX]

@Bramble, the PTO over-ride/over-run coupler is a must for any older live PTO tractor.......without it the energy of the implement can be directly transmitted right back into the tranny long after you've hit the clutch and/or the turning brake whick can buffet the tractor along.


As for a slip-clutch, it's great but not near as necessary as the over-running coupler. In 20 plus years of shredding (brush-hogging) I've yet to break a shear pin. Ever. All of my cutters have the original pins in them and that's cutting everything from thin pasture grass to 1" material. I did break one shear pin on a post hole digger years ago in some serious rock. I've gotten cutters hung up on rocks before and broken the 3-pt assembly...........but not the shear pin.


Truly makes me wonder what some people are doing with their 'quipment sometimes.

 

[MikeD74T]

As for a slip-clutch, it's great but not near as necessary as the over-running coupler. In 20 plus years of shredding (brush-hogging) I've yet to break a shear pin. Ever. All of my cutters have the original pins in them and that's cutting everything from thin pasture grass to 1" material.
Truly makes me wonder what some people are doing with their 'quipment sometimes.

Joe, What were you running for tractors in those 20 years? I bush hogged for 5 years with my Ford 841D on the same shear pin, traded for the Kioti DK45S & broke 3 pins the first hour. Live electric PTO is much different than the old Ford. I broke pins from too much power-much too quick. Same shear pin since adding the slip clutch & learning to idle down before engaging the pto. Over running coupler is pointless on tractors with live pto. MikeD74T

 

[Soundguy]

@Bramble, the PTO over-ride/over-run coupler is a must for any older live PTO tractor........

I agree with mike.. if you have live pto.. ORC isn't needed.

If you have independent pto and want to save your pto break you can use an ORC.

soundguy

 

[spruce Deere]

You may already know this, but a metric grade 8.8 is the equivalent of our SAE Grade5. But 45mm sounds kinda short for a shear bolt, that's barely an inch and three quarters.
//greg//

That I did not know greg_g, and yes its short And as sound points out, it is a flange type shear, not a collar-shaft type. For replacing sheared bolts, its not as bad to remove busted pieces as threw a collar-shaft stile. Still got to stop, get off tractor....... Clutches rule.

 

[Soundguy]

With that short of a bolt I was thinking it had to be flange.

any idea if that is an oem shaft on that mower or a replacement one?

soundguy