Touch control; mixed internals?

[havoc1482]

So I was putting the new o-rings in my touch control for the rebuild and I was scratching my head at Steiner's instructions.

They gave me 10 of these blue o-rings. 2 are for the pump, and depending on what style of block, you either use 4 or 8 more. Well when I disassembled I only removed 6. Here is where I think someone rebuilt this unit using a parts block.

If all 4 of these were double o-ring types I would have used the 8, and if they were all single type I would have used 4. I think someone may have used a set of doubles and a set of singles which is why I ended up only using 6 o-rings.



My unit does not have the inspection plate on the top so I believe it is the older style .

[Matt Kirsch]

Or, you may have a block that was assembled at the factory with mixed parts during a transition period. IH was famous for using up old supplies of parts as long as they were compatible, rather than throwing them away.

[havoc1482]

I don't think so. This tractor is a 1948, and the casting code on the TC block also indicates 1948 (R). The TC was first introduced on the Super A and C in 1947 and 1948 respectively. At that point in time the factory would have only been working with one type

[Matt Kirsch]

So much for that theory, LOL...

[havoc1482]

Well I can tell you this, I just put the unit back on the tractor and WOW! What a difference! The rockshafts follow the levers within like +/- 1 degree. The moment I put even the slightest pressure on the lever I can see the rockshaft on the TC starting to creep and it stops when I stop. None of that "playing catch-up" like it used to.

[Super A]

I don't think so. This tractor is a 1948, and the casting code on the TC block also indicates 1948 (R). The TC was first introduced on the Super A and C in 1947 and 1948 respectively. At that point in time the factory would have only been working with one type

There were lots and lots of changes going on to the TC unit in the 1948-49-50 period. If you can find a print copy of TC39C you wouldn't believe all the serial number breaks.

Al