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BDW1984

Removing captive nuts on MS261

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Does anybody know how to remove the captive nuts from the cover plate of an MS261 or if its even possible? Thanks

 

Out of interest: Why would you want to?

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Because on our work one they are made of cheese like metal they have rounded off on the corners and when done up tight are very hard to get off I was wondering how to replace them.

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There is a special tool 5910 893 9600 which is like a double ended bolt. One end is short and screws into the bar nut from the outside, it is then clamped in a vice and holds the bar nut secure whilst you drill the inner flange off with an 11mm drill.

 

You then put a new nut in and use the other end of the tool, which is a longer thread with a cone at the bottom, to screw into the bar nut from the inside. The cone forms a new flared flange to stop the new nut falling out.

 

Or you make something to achieve the same result.

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Does anybody know how to remove the captive nuts from the cover plate of an MS261 or if its even possible? Thanks

 

According to the MS 261 Service Manual:

 

Special tool 5910 893 9600 is available for replacing the nuts.

 

Removing

 

- Screw the short stud of special tool (1) 5910 893 9600 into the collar nut (2) 0000 995 0806 as far as stop.

 

- Turn the sprocket cover over and clamp the hexagon of the special tool in a vise.

 

- Use an 11mm drill to drill away the flange of the captive nuts – the shoulder in the sprocket cover must not be drilled out.

 

- Remove the collar nuts.

 

- Unscrew the special tool from the collar nuts.

 

Inserting

 

- Push the new collar nuts (1) into position.

 

- Hold hexagon of collar nuts steady.

 

- Screw the long stud of special tool (1) 5910 893 9600 into the collar nuts from the other side as far as stop. This flares the ends of the new collar nuts are secures them in the sprocket cover.

stud-1.png.4d3ec7ec41eb8b51430e0227656f926e.png

stud.png.8ea6c28449b8f67483b22286fb2b0d80.png

Edited by morten
adding image

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