Torque on nuts.

[mcfarmall]

Just be careful not to round the corners off. But if you do, there is a thread on the forum that can help you out with 200+/- ways to overcome the problem.

 

[daugen]

One of the reasons I bought this commercial mower was the ability to flip the deck up and allow me to get at the blades, which I like to sharpen at least twice a season.
Fused neck hurts like heck anymore if I work on the horizontal any more. So with a deck that flips up in front of me, I'm home free, right?

But then I saw that torque spec and thought oh no, you now can get at those nuts easily but then what? Not like my nice cordless Dewalt impact gun is going to work. Might be same one as Buford's.
And my challenge is with age, severe arthritis and bone disease, I really shouldn't/can't go yanking on long bars when the osteo docs limit me to 30 pounds. Which I sort of ignore up
to 50 pounds. Then it starts to hurt... Which is why I was hoping an air impact gun could do it, but who knows what that really tightens to, like the Chinese really care about how accurate
their specs are?....

I bet a torque wrench that can handle 700 pounds isn't cheap either.

guess I'll have to wait for a helper (my regular guy is 6'2, 280+ fireman)
This looks like a job for a very strong guy. Which I used to be.

yeah, better make sure the socket fits perfectly before you beat on it with 1000 pounds of twist.

Though with a long bar and one long pull, you never lose surface contact and likely are less likely to wreck the nut, right?

Never done this before. And if I buy these tools for my helper, like OP, want to have the right tool.

 

[YLee Kioti]

You guys helped with my blade issue. Now, in reading the manual (yeah, I do that), it says to torque the nuts to 644 ft. lbs.

The nut requires a socket that is 1 11/16" so is a large nut.

I have a torque wrench that only goes to 150 ft. lbs.

I found wrenches that go up to 700 ft. lbs. but they are expensive.

I have a DeWalt cordless 1/2" impact wrench that says it has max torque of 700 ft. lbs. However, the manual does not say how one can figure out how much torque one is applying.

I'd assume that any nut designed to handle 644 could also handle 700 so wonder, do I just use the DeWalt till it "seems" like it has applied all it can apply?

I'd really rather not have to spend $400 on a torque wrench. Last resort would be a breaker bar, cheater pipe and "farmer tight" but that may be the end result.

Thanks.

So, here's what I've learned from working around pipe fitters.
For a bolt/nut of this size I've seen a two step method.
To remove they use a slug wrench to break tension. Then impact for fast removal.
See this for example:1-11/16" Black Oxide Proto(R) 12 Pt Offset Heavy Duty Striking Wrench
| Fastenal

For reinstall impact for speedy snug tight then slug wrench for a full turn or several nut faces/degrees past full impact to get the tension needed.
Is 600+ lb-ft (which exceeds a cutter blade install) really needed?, sigh only a lawyer knows!

So, I went back and found several sites with torque tables. None listed a 1 11/16th size. Here is one with a calculator. Bolt Torque, Axial Clamp Force, Bolt Diameter Calculator | Engineers Edge| www.engineersedge.com
Of course it's not as close as the spec you have. Guess I would really confer with support from the product vendor. Maybe ask them if a slug wrench could be use vice a torque wrench due to limitations.

So this slug wrench can help physically challenged folks (my spring has left this chicken also) Slamming a 3lb hammer on the wrench to bust tension I'm sure will release nut much faster then rattling bones with an impact. of course disclaimer: YMMV

 

[BHD]

I used a torque multiplier on and 300 pound torque wrench on some bolts one time, and it seemed to work well, seems like 750 pounds of torque, was what was needed, on my job.

A HF 1" impact wrench would do the job, most likely,

 

[BufordBoone]

Changed the blades this weekend.

Though I had doubts about the ability of the DeWalt 20 volt impact wrench, I have none now. It worked like a champ.

Bolts are held in place by friction (I had to press them in with a bottle jack), a lock washer and the nut. I hammered the nuts with the DeWalt and then checked each manually.

On to the next issue (slip clutch).

Certainly is fun bringing this great old mower back!

 

[WranglerX]

Never really liked to tighten things with rattle gun if a specific torque value was specified... Though to get things loose its a different story...

Have 4:1 torque multiplier like mention a few pages back.... The nice thing is at 4:1 a 700 ft-lbs applied torque only need 125 ft-lbs applied from (at) torque wrench.. Set wrench 125, apply pressure till it "clicks" (yes I use click indicator style) ... BOOM... 700 ft-lbs....... Done, put tools away and have cool beverage of choice.... Don't want to brag, but I got mine for $10 at yard sale....

A $200-$300 torque multiplier is probably as cheap or cheaper then highly rated rattle gun....A 150 lb torque wrench to go along with torque multiplier is still more cost effective....

Amazon.com: Milwaukee 2763-22 M18 1/2" Inch Impact Wrench: Home Improvement

Neiko 3715B 1/2" Torque Multiplier Power Wrench, Cr-Mo / Cr-Va Steel | 11 Foot-Pound - - Amazon.com

Dale

 

[Pete O]

In the real world, I believe '700 foot pounds' equals swinging your whole body weight on a big breaker bar with the best length of pipe you have on hand that will slip over the handle. Try not to hit yourself on the head with it when it slips off.

 

[WranglerX]

Never really liked to tighten things with rattle gun if a specific torque value was specified... Though to get things loose its a different story...

Have 4:1 torque multiplier like mention a few pages back.... The nice thing is at 4:1 a 700 ft-lbs applied torque only need 125 ft-lbs applied from (at) torque wrench.. Set wrench 125, apply pressure till it "clicks" (yes I use click indicator style) ... BOOM... 700 ft-lbs....... Done, put tools away and have cool beverage of choice.... Don't want to brag, but I got mine for $10 at yard sale....

A $200-$300 torque multiplier is probably as cheap or cheaper then highly rated rattle gun....A 150 lb torque wrench to go along with torque multiplier is still more cost effective....

Amazon.com: Milwaukee 2763-22 M18 1/2" Inch Impact Wrench: Home Improvement

Neiko 3715B 1/2" Torque Multiplier Power Wrench, Cr-Mo / Cr-Va Steel | 11 Foot-Pound - - Amazon.com

Dale

Go the math wrong ... 700 ft-lbs, with 4:1 torque multiplier it would be 175 ft-lbs on torque wrench...

Dale

 

[Deere Dude]

You guys helped with my blade issue. Now, in reading the manual (yeah, I do that), it says to torque the nuts to 644 ft. lbs.

The nut requires a socket that is 1 11/16" so is a large nut.

I have a torque wrench that only goes to 150 ft. lbs.

I found wrenches that go up to 700 ft. lbs. but they are expensive.

I have a DeWalt cordless 1/2" impact wrench that says it has max torque of 700 ft. lbs. However, the manual does not say how one can figure out how much torque one is applying.

I'd assume that any nut designed to handle 644 could also handle 700 so wonder, do I just use the DeWalt till it "seems" like it has applied all it can apply?

I'd really rather not have to spend $400 on a torque wrench. Last resort would be a breaker bar, cheater pipe and "farmer tight" but that may be the end result.

Thanks.

TEKTON 24340 1/2-Inch Drive Click Torque Wrench (25-250 ft.-lb./33.9-338.9 Nm)
by TEKTON
$69.36 $ 69 36 Prime
Get it by Tomorrow, May 10
FREE Shipping

I bought one of these especially for loader arms. It is a nice wrench and one you don't want to carry around everyday because it is heavy. But is is a very nice wrench and for $70, not $400.

For mower deck bolts I use an air impact wrench and when it seems to stop turning I let it hammer for another second. Never broke one off or lost one either. INHO torquing those would be a major pain in the butt.

 

[Teachu2]

TEKTON 24340 1/2-Inch Drive Click Torque Wrench (25-250 ft.-lb./33.9-338.9 Nm)
by TEKTON
$69.36 $ 69 36 Prime
Get it by Tomorrow, May 10
FREE Shipping

I bought one of these especially for loader arms. It is a nice wrench and one you don't want to carry around everyday because it is heavy. But is is a very nice wrench and for $70, not $400.

For mower deck bolts I use an air impact wrench and when it seems to stop turning I let it hammer for another second. Never broke one off or lost one either. INHO torquing those would be a major pain in the butt.

So how do you get to 700 ftlbs with that wrench?