Fitting a manual grapple

[rooster cogburn]

Hello I’m going to fit a manual grapple onto a Case cx80. Where or how do I find where to mount the weld on bracket for the arm. Thanks

 

[V8Druid]

Hello I’m going to fit a manual grapple onto a Case cx80. Where or how do I find where to mount the weld on bracket for the arm. Thanks

are you buying it new - if so the suppliers should have the details of the geometry for it and be able to tell you its precise location on the dipper (and I'd not put any welds across the dipper's width - length only)

 

[rooster cogburn]

Bought it a few years ago never got it fitted. Will two long welds be good enough down each side.

 

[Storrsy]

Bought it a few years ago never got it fitted. Will two long welds be good enough down each side.

If no manufacturer guidance then I'd probably sit the machine on level concrete with the grab fixed and find the sweet spot where both halves of the grab is touching the ground and most likely to be used (probably about 2/3rds reach is about right) then you can use the stay/brace to show where the pad needs to be welded on. Does the pad have multiple positions for the brace obviously used the brace in the middle position on the pad so you have flexibility to adjust position once fitted

 

[Storrsy]

Also just make sure the brace support arm cant foul on the dipper when the grab is in operation. Shouldn't be a problem on an 8 tonner though

 

[Rob65]

are you buying it new - if so the suppliers should have the details of the geometry for it and be able to tell you its precise location on the dipper (and I'd not put any welds across the dipper's width - length only)

As I recall the pad eye brackets on the big machines some years ago had a ‘V’ shaped end with curved corners.

I was told the idea was so that they could be welded all around to prevent water getting in between the pad eye / dipper and subsequent rust problems but without causing localised high stress. It appeared to work as we didn’t have any failures that I can remember.

 

[CPS]

Tack it and try it before you weld it up solid

 

[rooster cogburn]

It was made by Scott’s in Northern Ireland. The plate on bracket is rectangular but I’d imagine it would weld fine.

 

[Storrsy]

It was made by Scott’s in Northern Ireland. The plate on bracket is rectangular but I’d imagine it would weld fine.

The chap who welded the thumb on my old 5 tonner only did the verticals. I questioned it at the time and he said that wouldnt come off in a million years and if it did he'd come back and redo it for free. As far as I'm aware it's still out their doing it's thing 5 years later!

 

[Giles]

Careful you don’t get any true grit in the weld

 

[Monkeybusiness]

Weld the verticals and silicone the horizontals.

 

[rooster cogburn]

Careful you don’t get any true grit in the weld

If the real rooster was here he would know what to do

 

[V8Druid]

As I recall the pad eye brackets on the big machines some years ago had a ‘V’ shaped end with curved corners.

I was told the idea was so that they could be welded all around to prevent water getting in between the pad eye / dipper and subsequent rust problems but without causing localised high stress. It appeared to work as we didn’t have any failures that I can remember.

as it should be - V either in or out - doesn't matter, as long as you don't put a heat stress point directly across the dipper at 90 deg.s to its length - asking for problems

this is even better

sorry it's a bit rough

 

[V8Druid]

The chap who welded the thumb on my old 5 tonner only did the verticals. I questioned it at the time and he said that wouldn't come off in a million years and if it did he'd come back and redo it for free. As far as I'm aware it's still out their doing it's thing 5 years later!

knew what he was doing then

 

[V8Druid]

It was made by Scott’s in Northern Ireland. The plate on bracket is rectangular but I’d imagine it would weld fine.

see above .. either don't weld the horizontals/across the dipper, or shape the plates as above

 

[rooster cogburn]

If there’s room to angle the end I might try cutting it