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Author Topic: Tiger 60  (Read 1690 times)

Offline Bootlegger

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Tiger 60
« on: December 09, 2010, 01:19:54 PM »
  Gotta rather "grubbed up" S T 60 that I am tearing down and need info on how to remove the wrist pin thru the opening in case, the sleeve is out but I am having trouble removing the pin.
  Got some penetrating oil soaking on it to help, but what tool's do I need?
  Also where can I get parts if I need them?

             D>K  Thanks a lot    H^^
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Gil Causey
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Online Brett Buck

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Re: Tiger 60
« Reply #1 on: December 09, 2010, 01:42:18 PM »
  Gotta rather "grubbed up" S T 60 that I am tearing down and need info on how to remove the wrist pin thru the opening in case, the sleeve is out but I am having trouble removing the pin.
  Got some penetrating oil soaking on it to help, but what tool's do I need?
 

   I have never worked on an ST60 but I think it's the same problem as the 46. What I usually did was poke a needle valve into the end of the wrist pin and then pull carefully. Sometimes I had to resort to cleaning it up and putting some Hot Stuff on the needle - it's easy enough to unglue later. You need to be careful because it's possible, if you don't pull it straight out, to break the needle off in the hole (never happened to me - no, really! - but last time I mentioned this some said it happened to them).

   If it's stuck, I would put it in an oven at the lowest possible setting for a while and that should loosen it up.

   One you get it out, I suggest that you thread the end of the wrist pin pad with a 1-72 or 2-56 screw thread, so next time you can screw a screw into it, and pull it out with some force.

     Brett

     

Offline Bill Hummel

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Re: Tiger 60
« Reply #2 on: December 09, 2010, 05:51:57 PM »
Hi, Gil, be really careful, parts are VERY hard to find.  Randy Smith still has some parts, depends on which model ST 60 you have. Frank Bowman can
supply excellent rings, and bearings are available locally or from Boca. Brett's suggestion should help get the wrist pin out!
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Offline RandySmith

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Re: Tiger 60
« Reply #3 on: December 09, 2010, 06:37:21 PM »
I have built many hundreds of ST46s, the wrist pin does not come threaded, if it is someone has put the threads into the pin, BE careful pulling the pin, even if you have threads the turned al.end of the pin will come out fairly easy, these are just pushed into the steel wrist pin as pads.
So make sure it is close to being loose before you try to pull the pin out

Regards
Randy

Eric Viglione

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Re: Tiger 60
« Reply #4 on: December 09, 2010, 06:46:54 PM »
I used to slide the sleeve up so that the bottom of the sleeve was still in the case and over the piston ring but the wrist pin was exposed and in position to the access hole in the rear. This made it MUCH easier to remove the pin than chasing a loose piston around to get it. A healthy motor the pin should practically fall out on it's own.

Now don't laugh, but in some situations where the wrist pin was galled ( I know galled is not the right word, they are dissimilar metals, but I can't think of a better word at the moment) into the piston, no amount of pulling would get them out... even with an easy-out tool. The
Pro engine builders will probably cringe, but I confess I sometimes had to resort to drilling a small 1/8" hole in the front of the case opposite of the rear access hole and drive the pin out. It made it VERY easy. When done and you reassemble, just fill the hole with JB weld. If you wipe the excess JB off with neatly with thinner, you will have a very hard time finding any evidence. The sleeve fit will seal the hole and it's only cosmetic anyways. Oh yeah, polish the pin and check the fit before you re-use it, if it's not a "free" fit like it should be, find a replacement.

Sorry if my confessed method offends anyone! Heh... LL~

EricV

 Gotta rather "grubbed up" S T 60 that I am tearing down and need info on how to remove the wrist pin thru the opening in case, the sleeve is out but I am having trouble removing the pin.
  Got some penetrating oil soaking on it to help, but what tool's do I need?
  Also where can I get parts if I need them?

             D>K  Thanks a lot    H^^

Online Brett Buck

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Re: Tiger 60
« Reply #5 on: December 09, 2010, 07:49:50 PM »
I have built many hundreds of ST46s, the wrist pin does not come threaded, if it is someone has put the threads into the pin, BE careful pulling the pin, even if you have threads the turned al.end of the pin will come out fairly easy, these are just pushed into the steel wrist pin as pads.
So make sure it is close to being loose before you try to pull the pin out

  I usually tried pushing it *in* before trying to pull it out to make sure it was broken loose from the piston and connecting rod before pulling it out. Still no guarantees, however. 

    And, Eric, don't feel too bad - I know someone who regularly drilled a hole in the case to get the wrist pin, piston, etc, out of PA 61/65s. I am sure Randy and Henry were quite pleased with that one, huh? It worked but I forget how he sealed it back up afterwards.

     Brett

Offline Alan Resinger

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Re: Tiger 60
« Reply #6 on: December 09, 2010, 08:48:28 PM »
Many years ago I had one of my really good running 60's that was due for a ring change and I took the engine apart. When I went to remove the wrist pin I pulled it out and only half of it came out.  I had to drill a hole in the front of the case and push the other half out.  Looking at the two parts of the pin it was pretty plain to see that the break had happened some time before as the broken ends had polished each other.  I don't have any idea as to when the break occured but the engine ran perfectly for all that time.

Online Brett Buck

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Re: Tiger 60
« Reply #7 on: December 09, 2010, 10:41:40 PM »
Many years ago I had one of my really good running 60's that was due for a ring change and I took the engine apart. When I went to remove the wrist pin I pulled it out and only half of it came out.  I had to drill a hole in the front of the case and push the other half out.  Looking at the two parts of the pin it was pretty plain to see that the break had happened some time before as the broken ends had polished each other.  I don't have any idea as to when the break occured but the engine ran perfectly for all that time.

   In that situation I would have been tempted to cut the connecting rod. Conrods are plentiful.

     Brett

Offline Bootlegger

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Re: Tiger 60
« Reply #8 on: December 10, 2010, 12:18:10 PM »
    H^^          Guy's , sure do than all for the suggestions .   D>K
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Offline Bill Little

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Re: Tiger 60
« Reply #9 on: December 11, 2010, 11:56:18 AM »
    H^^          Guy's , sure do than all for the suggestions .   D>K

Hi Gil,

I hope you get it all rebuilt and running great.  You are getting your ring from Frank, right?  I wouldn't use anyone else's.  Even though I will probably never wear out another factory ring. LL~

Everyone needs to experience Jurassic Stunt at least once.  Heaven forbid, I have a Buso design 90% built right now for a ST .60 Big Jim Hemi. (but it has been that way for a couple years, I guess)
Big Bear <><

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