replacing clutch spring on Mutual Power dropweight

Discussion in 'Stringing Techniques / Stringing Machines' started by spun_out, Jun 26, 2013.

  1. spun_out

    spun_out Rookie

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    Hi,

    I think the clutch spring broke on my Mutual Power dropweight stringing machine (MP610, I think), and I am having a hard time removing the main bolt that goes through the drum so that I can disassemble the drum to get to the spring. Does anyone know how I can disassemble the drum and replace the spring on this machine? In the video I saw on youtube, the guy simply pulls the drum apart into 2 parts effortlessly. Mine won't budge.

    Thanks.
     
    #1
  2. spun_out

    spun_out Rookie

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    Well, I managed to separate the drum, but I have another problem: the spring broke at the hole so I am having difficulty removing the broken piece out of the hole. The broken piece is sticking out a little bit, but not enough for me to grab it with a pair of pliers. Any advice?
     
    #2
  3. struggle

    struggle Hall of Fame

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    magnet?

    10 char

    duct tape?

    there's a way. is the "hole" accessible from the other side somehow?
     
    #3
  4. rich s

    rich s Hall of Fame

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    1. turn the unit so that the hole is facing down and tap on it to get the piece to fall out?

    2. crazy glue a small finish nail to it and pull it out with the nail?

    3. pry it out with the pointy end of a small finish nail
     
    Last edited: Jun 27, 2013
    #4
  5. Squidward

    Squidward Rookie

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    If it's sticking out enough, try using a pair of dikes (wire cutters). They will bite more than a standard set of pliers. You might be able to work the broken piece out easier.

    Good Luck!

    BTW, If you had a pic, we might be able to make a better suggestion.
     
    #5
  6. spun_out

    spun_out Rookie

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    Thanks for the suggestions. I have tried most of them but to no avail. I think that I need to remove the grease so that I can get better traction. The broken piece is barely sticking out (I would say around 0.5mm) but sticking out enough to make me want to keep trying.
     
    #6
  7. barry

    barry Hall of Fame

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    I had the same problem on an old drop weight, just put it on a drill press and drill a new hole. The hole only stops the spring from moving. If you try and drill the current hole out, it will take a while since the spring is hardened and you will ruin your bit.
     
    #7
  8. spun_out

    spun_out Rookie

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    Thanks for this. I am afraid that this might be my only option. Unfortunately, I don't own a drill press nor do I know anyone who does so I will have to go on a search for one.
     
    #8
  9. dlo

    dlo New User

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    I have the same machine. I used to string for my son, but he is in college now and I have been away form this forum. I had to replace my spring about six years ago. I did not have any problem removing the spring and I sent it back to the guy (can't remember his name) in Texas, and he sent a new one. I can't seem to find anything on Mutual Power now. Where do you plan on getting a new spring?
     
    #9
  10. struggle

    struggle Hall of Fame

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    eagnas should have them as their machines look identitical up and down the range, no?
     
    #10
  11. dlo

    dlo New User

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    I looked at their web site and he is pretty emphatic about not selling parts for other machines. I am thinking about taking mine apart and seeing if I can get it copied by a spring manufacturer before it breaks.?
     
    #11
  12. struggle

    struggle Hall of Fame

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    If you just order the part you need and don't ask for your hand to be held through the process, Victor will sell you the part.

    Or ask for the girl there, forget her name and give a part number or a machine model (eagnas of course) and just order the spring.

    If you see a "matching" machine just tell them that is what you need the spring for.
     
    #12
  13. gotwheels

    gotwheels Semi-Pro

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    dlo, Contact Alpha/newtechtennisdotcom and give them the dimensions - they may be able to help you out. Also, less expensive than eagnas and much more pleasant.
     
    #13
  14. spun_out

    spun_out Rookie

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    Thanks for all the suggestions. I found someone with a drill press and made a new hole; ordered the spring from New Tech Tennis, and the spring fit fine, although it took a bit of effort. I put everything back together and just finished stringing a racquet. The machine seems to work fine, but I am not sure if it has been returned to the way it was because of the following:

    1) I remember the drum with the linear gripper making a sound when rotated by hand. Am I mistaken? The machine after the fix makes no noise.

    2) Perhaps related to the first issue, the drum with the linear gripper is pretty tight and there is lots of friction between this part of the drum and the drum with the tensioning arm. However, the two parts of the drum as a unit moves freely in relationship to the machine as adjusted by the clutch hub mounting screw.

    Will these conditions cause problems in stringing racquets? Any thoughts would be appreciated.
     
    #14
  15. dlo

    dlo New User

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    My machine does not make noise when rotated. I think that it is all relative and if you feel that the machine is stringing your racquet correctly and go out and play and it dose it's job then no worries. I do not string or play for money so as long as I am satisfied with my string job I am happy. Just enjoy your freedom to experiment with different set ups and have fun. For the pros that string for others then yes, make sure your equipment is correct, but then I would have spent more than $2000 on my machine. Just saying. And thanks for the spring tip tbuggle.
     
    #15
  16. struggle

    struggle Hall of Fame

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    take it back apart, maybe somethign is awry?
     
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