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Post by chainsawwhisperer on Nov 20, 2009 12:21:25 GMT -5
Dan, Jared, I don't see any reason why it would not work. In fact I think it's an excellent idea! Jim
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Post by OBR on Nov 20, 2009 22:12:30 GMT -5
You sure do have a very plausible idea. I like it. Save me a lot of time to turn down an appropriate push pin, etc. I think I'll give it a go tomorrow morning and get this project back on track!
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Post by MCS on Nov 21, 2009 11:29:27 GMT -5
I see nothing in the Homelite Service Manual that says there is any orientation between the piston and rod so just flipping it 180 should work.
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Post by OBR on Nov 25, 2009 10:37:42 GMT -5
Well, I flipped the rod and now the rotating ass'y is complete. Put it all together yesterday following the guidlines we determined here. The yamabond stuff worked really well, easy to work with. I plan to take it over to a local saw shop this afternoon to have the crankcase vac/pressure tested to make sure everything's a-ok before proceeding any further. She feels real smooth and nice and tight, I think we've got a winner here. Hopefully late tomorrow we can see if she'll fire up (if all goes well).
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Post by chainsawwhisperer on Nov 25, 2009 10:52:28 GMT -5
Good luck OBR! I hope it "runs like a raped ape" Just remember to take your time, sometimes I get caught up in the excitement of reassembly and forget things. Jim
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Post by OBR on Nov 25, 2009 11:00:09 GMT -5
You bet Jim, I know what you mean, but I think I got it right so far you know pisotn in there the right direction, bearings with lettering against snap ring, tapped in the seals after joining cases, etc... I'll just take my time, one step at a time the rest of the way through the rebuild. Best part is once its done I can swap the bar and chain from one of the super xl's and give her a try! Anyways, I thought a couple pics were in order:
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Post by OBR on Nov 25, 2009 11:01:01 GMT -5
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Post by OBR on Nov 25, 2009 20:31:53 GMT -5
Well, dropped the rotating assembly off at the local saw shop, but due to the holiday it wont be till the weekend until they'll be able to do the vac and pressure test on the crankcase, so it looks like I'll be doing a little waiting again....
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Post by lesorubcheek on Nov 27, 2009 13:29:26 GMT -5
Looking great! Can't wait to see it as it comes together.
Dan
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Post by OBR on Dec 21, 2009 9:16:58 GMT -5
Well...it failed the vac/pressure test, around the transfer port covers, which I was afraid of. I used the yamabond on them but they need a silicon type sealant to seal properly, the yamabond is too thin to fill all the space. What type of silicon sealant do you all use/recommend? Thanks.
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Post by MCS on Dec 21, 2009 10:04:17 GMT -5
Well...it failed the vac/pressure test, around the transfer port covers, which I was afraid of. I used the yamabond on them but they need a silicon type sealant to seal properly, the yamabond is too thin to fill all the space. What type of silicon sealant do you all use/recommend? Thanks. OBR, I've never worked on a 550 so I'm curious as to where or what is leaking. I don't see anything in the parts list called a transfer port cover. Aren't the transfer ports cast into the cylinder like other saw engines I read through all the pages in the 550 service section and don't see anything that specifically mentions anything like this.
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Post by chainsawwhisperer on Dec 21, 2009 10:41:00 GMT -5
The transfer port covers are removable like on the 750's but I'm suprized that Yamabond will not seal them. they are 2 machined surfaces, they should seal???
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Post by MCS on Dec 21, 2009 14:16:11 GMT -5
The transfer port covers are removable like on the 750's but I'm suprized that Yamabond will not seal them. they are 2 machined surfaces, they should seal??? In my 750 IPL I see the cylinder, item 5, the crankcase, item 48, and the backplate, item 25 which is pretty much the same as the soft copy IPL I have for the 550. I don't see anything that looks like it would be a transfer port cover What am I missing?
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Post by lesorubcheek on Dec 21, 2009 15:18:16 GMT -5
They're not listed as a separate part, but they are removable. Here's a pic from a 450 case that happened to be handy. Think the 550 looks a little bit different, but same idea. I've never had to remove any, so sorry but I can't offer any advice about what to use to seal 'em. Sure would think the Yamabond should work though, but if not..... not. Just a good thing you checked it, otherwise it may not have been good! Dan
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Post by werners on Dec 21, 2009 16:10:12 GMT -5
On my 450 these covers are of sheet metal (On my next disasembly I'll take photos)
Best regards Werner
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Post by MCS on Dec 21, 2009 17:13:46 GMT -5
I found a good picture of the 750 which goes along with the 450 picture. In CSW's 750 rebuild pictures, there it is I think Yamabond and the likes will work on machined surfaces with a perfectly true surface that is quite rigid. These transfer port covers don't have to support any high pressures so I can't imagine it would be to picky about the sealant. I would think that the initial bead would have to be ample enough so the sealant would ooze just a bit to ensure a good seal.
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Post by redsqwrl on Dec 21, 2009 17:47:42 GMT -5
Well...it failed the vac/pressure test, around the transfer port covers, which I was afraid of. I used the yamabond on them but they need a silicon type sealant to seal properly, the yamabond is too thin to fill all the space. What type of silicon sealant do you all use/recommend? Thanks. I use the ford Goo that is listed as the sealant for the 7.3L diesel. It is used for the intake and oil pan, that is good stuff. Go to a ford dealer and ask for the intake sealant. you won't regret it.
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Post by MCS on Dec 21, 2009 18:35:10 GMT -5
Duh, post 46 shows the transfer port covers very well I guess sometimes it helps to page back through thread In that picture they look to be sealed quite well.
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Post by OBR on Dec 21, 2009 18:57:12 GMT -5
Yup I had to remove them for the replating. The two surfaces aren't like flush with each other. the port cover kind of has a grove in it and the cylinder a lip. I'll post pics when i get it back apart. I think I need some type of hi-temp silcon sealant or something..
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Post by lesorubcheek on Feb 5, 2010 13:14:45 GMT -5
Just realized this post has been sitting around for better than a month now with no updates...... What's happening OBR! Bet by now you've cut a forest with it. Getting about ready to start a 550 project here.
Dan
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