[Farmall] Drive Shaft For H Lift All

[E. John Puckett]

The H was one my father farmed with for 45 years, and on the H liftall 
there is a spring that when the pump reaches maximum pressure (such as 
end of hydraulic stroke) returns the lever to the hold position.  That 
spring breaking is a common problem, and most people do not bother to 
replace it since the only thing it does is automatically pull the lever 
back to neutral at high pressure.  We were lucky enough that the end of 
the spring, about twice the size of a pencil lead and around 1 1/2 
inches long was picked up in the pump intake and went through the pump.  
It actually took small pieces out of the pump gear as it went through.  
The pump did not work quite as well afterwards, but money was tight and 
we just used heavier oil in it.  After some great friends on the 
Farmallcub.com forum got it and fixed it up then gave it back to me 
along with the loader as a surprise I decided to do some repairs.  I 
welded a piece of bar stock to a 5/8 bolt and used my impact wrench to 
try removing the drive lug on the pump to replace that seal, but broke 
the bolt.  Also made a pretty good crease in the piece of flat steel I 
had inserted in the pump to hold it.  After that I bought another used 
pump and fixed it up, but the seal at the front of the transmission is 
leaking pretty bad, and I have not had any luck at unscrewing that 
coupling.  I made a tool out of a piece of 18 inch long angle iron and 
some flat stock, but was not able to turn it with that.  The next thing 
I was thinking of was grinding down an impact socket and welding some 
bar stock on it to use with my impact wrench.  I have a 1/2 inch drive 
650 ft/lb impact I think I can get in there, but due to my health I have 
not attempted to remove the pump and do it yet.  As to inspecting the 
coupling, I cannot see any damage, but it is hard to see inside the housing.

szabelsk at gdls.com wrote:
> John,
>
> Thought about the pump last night and came to the conclusion that the 
> threads on the shaft would be right hand threads, not left hand threads. 
> This is because the gear it drives would have to rotate clockwise, and in 
> order for the coupler to stay attached to the shaft when rotating it would 
> have to have right hand threads. I'll go talk to the shop this afternoon 
> and see if they can some up with anything simple to make and get you their 
> ideas. 
>
> Off hand it sounds life maybe the end of the shaft has been essentially 
> pulled into the back of the coupler and is wedged good and tight. That or 
> the threads have been ground up and everything is just bound up for the 
> entire thread length. I would assume that the shaft is a harder material 
> than the coupler (?) so I would figure that the coupler threads may be 
> damaged and the coupler would need to be replaced once you get them apart. 
> Have you taken a good look at the couple and looked for cracks?  If there 
> are any, then maybe the best thing would be to simply cut the coupler in 
> half and get a new one.
>
> Carl Szabelski
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