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SA touch control con't

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P and R Pete

03-02-2008 18:05:57




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Couple of pics to help those yet to travel by this way..

Here's the rockshaft. The outer rockarms are removed. It's a tapered keyed shaft. The left (L on the tractor) pillow block is split, the right is not. You can see the arms which constrain the connecting rods..

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The connecting rods, still attached to the pistons, and the pins which went through the arms and connecting rods. They were a bear to drive out.

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The nubs on the ends of the pins were held by the control valve operating lever bracket, which can be separated enough by the removal of two bolts in the bracket, whose holes can be seen to the left, to allow it to be popped off the pin nubs. Turns out the boots are cylindrical (!) and are folded around the connecting rod, and held wrapped by a piece of wire twisted. The head of the connecting rod thus fits THROUGH the boot, and can be pushed through, and the piston/rod assembly removed from the rear of the block.

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The bottom ends of the control valve operating lever brackets are pinned to the ends of the control valves. The boots are held in similar fashion. However, the control valve cannot be extracted until the lever 'stops' are moved, one of which can be seen on the far left of the picture. Two bolts hold it in. It can be swung up if the front bolt is removed and the rear loosened. Afterwards, the control valve, (a long sucker) can be slid out of the block.

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Here are the control valves, (still attached to their brackets), which are NOT shown on the exploded view in the 'serviceman's touch control handbook'.

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Here's a pic of the bottom, at where all the magic happens. Lots of allen-headed plugs to remove, and two nuts that I expect are hiding 'thermal relief valve screens'.

Maybe Sam and Greg are here already, and can me what' hidden here.

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I'm very curious to hear what Greg's "rattle" turns out to be, besides the whereabouts of his safety valve piston.
I'm thinking I might take the stripped block to my machinist for his cleaning-treatment wizardry. He took my crudded carbon-encrusted head and made it look brand-new. Everywhere I read, everything has to be clean-clean-clean when reassembled.

Onward and upward...

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P and R Pete

03-03-2008 14:52:52




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 Re: SA touch control con't in reply to P and R Pete, 03-02-2008 18:05:57  
Greg, your wife have a birthday coming up? Drill a hole through that piece of cast, run a jewelry chain through it, and you'd have one mighty fine pendant! Original Farmall! Bet she'd be thrilled! LOL

Glad you found 'er though. That would have driven me to drink.
I just brought this home from my local NAPA store after work today, after no luck at Sears, Lowes, and a Do-It Center. I'll let you know how it works. Lifetime warranty!

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But first, dinner, kid's homework, kid's showers. I'll see if I can't sneak out unnoticed in the middle there somewhere.

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riverbend

03-03-2008 06:02:28




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 Re: SA touch control con't in reply to P and R Pete, 03-02-2008 18:05:57  
I dropped my t.c. block off to be hot tanked last week. After scraping, wire brushing, etc, the crud on the front end, hot tanking seemed like a good way to make sure all the grit would get flushed out.

Greg



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Greg-N-CA

03-03-2008 05:55:31




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 Re: SA touch control con't in reply to P and R Pete, 03-02-2008 18:05:57  
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I finally found the source of my rattle. After putting the block on my engine stand to spin it over quickly, I identified the noise to be coming from the top of the block. I popped out the expansion plug and found a broken piece of cast trapped between the cylinders. I now have a souvenir from the factory!

I pulled all the passageway plugs yesterday and cleaned everything out. I only found a few of the plugs to be hiding dirt and old fluid, it was worth while. I was able to remove the safety valve piston with a pair of jeweler’s needle nose pliers, but I still cannot get the pressure regulator valve seat out.

Pete, you were right, the front of your control block was a "cruddy mess." Glad you got it apart; I hope Sam is making progress too. The YT forum is a GREAT venue, how else would those of us doing the same project across the States be able to share like this? Awesome, thanks!

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P and R Pete

03-03-2008 15:15:29




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 Re: SA touch control con't in reply to Greg-N-CA, 03-03-2008 05:55:31  
Greg, your wife have a birthday coming up? Drill a hole through that piece of cast, run a jewelry chain through it, and you'd have one mighty fine pendant! Original Farmall collector's item. Bet she'd be thrilled! LOL

Glad you found 'er though. That would have driven me to drinking whiskey out of a paper bag.

I picked up a drag link socket from NAPA on the way home from work today. I'll let you know how it goes.

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tractorsam

03-03-2008 13:25:40




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 Re: SA touch control con't in reply to Greg-N-CA, 03-03-2008 05:55:31  
Okay, I'm going to go out on a limb here. That lump of iron you removed from the block isn't just any old piece of broken cast. When that block was first cast those were put inside the casting after it had been removed from the mold to clean out the last of the sand. What bugs me is that I'm pretty sure about this but I can't for the life of me remember where I saw one or how I know about it. Hmmmm?

Didn't get anything done to my stuff on the weekend. I spent saturday at the local IH dealers working on a pulling sled he's building and apart from clearing some snow I didn't do a whole lot yesterday. Hopefully I'll get back at it tonight. tractorsam

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