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Finally - a successful decapitation :)

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tractorsam

02-26-2008 11:49:43

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After numerous failed attempts I've managed to remove the cylinder head from my touch control unit. I can already see some of my issues so this looks like it's going to be fun. The top of the LHS piston is scored (in a circular fashion) which has me puzzled as I can't see how that could happen in situ. Also I appear to have an extra spring lodged in the side of the of the valve jobs (also on the LHS). Photos will follow when the camera batteries charge. tractorsam

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Hugh MacKay

02-27-2008 17:20:55

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 11:49:43

Sam: Your alien has a lame looking eye, it's not near as good looking as Pete's. I call it an "it" as I'm not sure of gender.

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tractorsam

02-27-2008 17:49:56

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Re: Finally - a successful decapitation :) in reply to Hugh MacKay, 02-27-2008 17:20:55

Not much of a looker is it? I think leaving it gender unknown is probably best, old Farmall's seem to be female but those touch controls are pretty ugly :) tractorsam

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Farmer Bob

02-26-2008 20:40:17

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 11:49:43

Could you try to use a rubber tipped dart on that stuck bushing? you would need to get the oil washed off of it with quick dash of acetone first so the dart would stick to the head of the bushing. May work,may not. But at least it's worth a try.

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tractorsam

02-26-2008 15:57:30

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Re: Further disassembly - and further questions? in reply to tractorsam, 02-26-2008 11:49:43

Okay, I've been having a bash at removing the guts of the touch control, taking pictures and placing the components in tubs marking their location. The RHS check valves and their bushings came out by just sticking my finger into them and giving them a pull. The LHS however seems determined to stay put. I have the outer check valve bushing turning but cannot extract it and I cannot even get the inner check valve bushing to rotate. Any suggestions for getting hold of these rather slippery components and removing them from their hiding places. Also my pressure regulating valve assembly appears to be different to what is shown in my parts breakdown. In the one that is depicted the valve runs directly in the housing and in mine there appears to be a bushing which will move slightly but doesn't want to come out. I have pictures available if they will help anyone but my computer is a bit slow so I won't post them if they're not needed. Many thanks, tractorsam

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P and R Pete

02-26-2008 17:16:35

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Re: Further disassembly - and further questions? in reply to tractorsam, 02-26-2008 15:57:30

sam, congrats on the head.
I haven't been able to get at mine yet so I'm not sure exactly what you're up against, but a couple of things I'm wondering-

Would a magnet help?

With the stuck bushing- I can open a slipperytwist-off cap easier with a rubber band around it. would a rubber glove. or such, over your finger and stuck into the bushing, allow your finger to grip and twist better?

Or a slightly narrowed piece of wood that would 'jam' in the middle?

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tractorsam

02-26-2008 17:56:49

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Re: Further disassembly - and further questions? in reply to P and R Pete, 02-26-2008 17:16:35

I felt pretty good about getting that head off, it did however require a trip to NAPA to get a suitable gasket scraper to drive between the parts. I seem to be living there lately, I think rent might be cheaper than tools, hmmmmm? My magnet was my first guess but it didn't quite cut the mustard for most of the parts, good for fishing out some of the small stuff though.

I was wearing rubber gloves (well the blue nitrile jobbies anyway) but there's so much oil about they don't make a whole lot of difference. On the other hand they are what I used to get the ones out that I was able to. I'm liking the idea of a bit of wood and I've just had another idea. If I can find a piece of rubber that will fit snugly inside the bushing and then put a bolt through it and use a nut on the bolt to expand the rubber and lock it in the bushing and then use vice grips to extract the whole jolly lot (hopefully you followed that). I'l post back again when I make some more progress, should be sometime tomorrow. tractorsam

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Janicholson

02-26-2008 13:32:40

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 11:49:43

The scoreing could be corrosion caused by moisture or acidic conditions while the piston/seal was not moving for years. JimN

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tractorsam

02-26-2008 13:38:25

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Re: Finally - a successful decapitation :) in reply to Janicholson, 02-26-2008 13:32:40

Sorry the picture isn't the clearest, but the damage is to the piston itself, not the cylinder. There are circular score marks around the top of the piston that almost look like it was in a lathe and someone made an incredibly bad job of facing it off. I had a better pic but it wouldn't load. The other side looks freshly machined (just as I would expect it to in other words). tractorsam

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Janicholson

02-26-2008 13:55:57

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 13:38:25

THe score marks in the head of the piston are irrelevant. (a machinist had a bad day, but the scores do not touch anything or cause problems.
Look at Peat and R peat on page 2 for a pic of the same issue of the valves, his valves look much different. JimN

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tractorsam

02-26-2008 14:16:25

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Re: Finally - a successful decapitation :) in reply to Janicholson, 02-26-2008 13:55:57

My pics aren't the clearest but what I have is very similar to what P and R Pete has. I have acutally already removed the valves as the book I have says they need to be installed from and removed from the rear. I'm glad to know that piston shouldn't hurt anything, I wasn't sure if it was something that indicated a problem or just part of owning an old tractor. Thanks, tractorsam

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Janicholson

02-26-2008 14:30:26

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 14:16:25

No problem, JimN

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tractorsam

02-26-2008 13:32:01

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 11:49:43

Here is a shot of the valve (?) that has a rather squashed spring lodged underneath it. The one on the RHS moves freely but this guy is stuck. If you look above it you can also see the damage to the head of the piston. I'll continue disassembly after supper. Can someone enlighten me on how to put multiple images in one post? Many thanks, tractorsam

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ScottyHOMEy

02-26-2008 13:41:22

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 13:32:01

For multiple pics, just separate the urls for the pics with a comma between each

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tractorsam

02-26-2008 13:51:54

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Re: Finally - a successful decapitation :) in reply to ScottyHOMEy, 02-26-2008 13:41:22

Thanks for that, I seem to have one picture at a time nailed down but two seemed a bit like rocket science. Now it's rocket science explained :) tractorsam

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tractorsam

02-26-2008 13:28:32

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Re: Finally - a successful decapitation :) in reply to tractorsam, 02-26-2008 11:49:43

Hopefully there will be a view of the touch control with the head off with this post. If not it's over on Parts & Pieces. tractorsam

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