59 641 power steering breaking hyd cylinder !

Craig 59 641

New User
Turning left side bent original cyl. Thought old cyl froze up bound up and bent. Bought a new one and bent that one. Looks like pitman arm might out of adj ?? Moving cyl to far in extended position. I don't know what to do. Won't put a new cyl on till I know how to adj this. Bought this for 2ooo. With dearborn loader back blade,single bottom plow,york rake and 5ft brush mower. Have 110 psi all cyl runs like new. I'm 3 owner since 59.
 
This has been discussed here before and I
dont think there was ever a definitive
answer on why it happens.
But maybe someone will pop in with the
reason.
In the meantime never, ever hold the wheel
hard against the lock. I will steer all
the way against the lock then back off
about 1/6 of a turn. Takes a while to
remember to do it but bent cylinder rods
are an effective teacher. Now I always
remember and even do it in my pickup and
wife's car.
 
Which way were you turning when it bent? Sounds like your cylinder is pushing on a rod thats too short lengthwise. If it is extending when bent then either your steer rod or your cylinder need adjusting. the steer rod will adjust quite a bit compared to the cylinder. You might have to adjust both sides to get your toe-in right.
 
it was turning left cylinder bent when fully extended. As if pitman arm was trying to push it too far and wheel was at the stop. I adjusted the drag link a bit maybe not enough. My right side has no problems works as it should. ??
 
I had this problem with a customers tractor after I installed a new aftermarket steering pump. Did it two times. I finally took the pressure relief
valve out of the old pump and put it in the new one and have not had the problem since. Been about a year now. Must have fixed it.

Zane
 
I replaced the pump because the shaft seal was leaking and adding oil to the engine.

Zane
 
I too replaced my orig. Pump with new type from Yesterday's Tractor. Old pump don't share same relief valve. Can't swap them. Why would it effect one side only?? Unless I've got some adjusting to do. But then all I did was up date to new cyl. After orig one bent.. Only adj I know of is in drag link.
 
When the front wheels are both straight ahead with the proper toe-in adjustment, are the two steering arms in the same relative position on the sides of the steering box? I think they both should be slightly forward of straight down.
 
(quoted from post at 05:15:17 10/16/17) When the front wheels are both straight ahead with the proper toe-in adjustment, are the two steering arms in the same relative position on the sides of the steering box? I think they both should be slightly forward of straight down.
f you mean the pitman arms or drag links. Pitman arms are one slightly foward and one slightly reward. Drag links about same both sides. Wonder if left side Pittman is what needs to be moved
 
(quoted from post at 21:00:30 10/16/17)
(quoted from post at 05:15:17 10/16/17) When the front wheels are both straight ahead with the proper toe-in adjustment, are the two steering arms in the same relative position on the sides of the steering box? I think they both should be slightly forward of straight down.
f you mean the pitman arms or drag links. Pitman arms are one slightly foward and one slightly reward. Drag links about same both sides. Wonder if left side Pittman is what needs to be moved

OK, I looked them up on the parts site, and they are actually called "steering gear pitman arms", and yes they need to be matched in position when the front wheels are centered. If they aren't, I can understand why the steering linkage can end its travel in one direction while the cylinder would still have travel left in it's ram, while steering in the other direction would result in the ram ending its travel before full steering lock in that direction had been achieved in the linkage.

If one is slightly forward and the other is slightly rearward when the front wheels are centered, then the sector gears inside the steering box are not properly timed to each other.
 
Makes sense will look into it more. This wk end. Think I just need to move pitman arm till even. Them see how steering lines up,. Adj drag links from there.
 
Update on cyl breaking been awhile. Ran using 1 good cyl. Bought 2 new 5/8 shaft cyl. Installed them. Lifted front of tractor. Removed tires. Pulled sector gear covers. Turned steering wheel till hubs looked straight. One was turned in slightly. Right side. Adj till straight. Then checked sector gear for correct location.. They were good. Now as my past posting States. One pitman arm is offset from the other. This because sector gears are offset in steering column masking pitman arms offset. Note now both are straight up and down. Put back together has been 4 wks no problems. Thanks to all who replies. Your inputs got going in right direction.
 

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