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dfwallis 
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Joined: 09 Mar 2023
Location: Texas / Indiana
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 Topic: CA hydraulic cylinder connection
Posted: 30 May 2026 at 9:02am |
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Can the ca hydraulic cylinders be attached to the hole inside the lift arm rather than the protruding tangs, to restrict the range of motion? Normally, it has about a 26 inch range of motion. I don't want to tilt the pto shaft that much. This inner attachment point gives almost the perfect range of motion. Of course it's a bit difficult to get a pin in there, but I'm sure I can figure it out.
Edited by dfwallis - 30 May 2026 at 9:31am
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1952 CA13092, CA Pickup Plow, CA Cultivator, CA Two Row Planter, Dunham-Lehr GC78 Disc, Grader Blade, 3pt Fm180 Finish Mower
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dfwallis
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Location: Texas / Indiana
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Posted: 30 May 2026 at 9:31am |
Looks like there's a little less than .0015 clearance with the rockshaft at full extension...some weld spatter and thick paint...I think I can clean that up to maintain acceptable clearance.
I don't want to use this connection point unless I can guarantee acceptable clearance. I think I can grind/dremel it to be certain. I don't want to scratch the cylinder. Right now, it looks to be almost exactly in contact with the rockshaft at full extension (.0015 was the thinnest gap test I had).
I can find no reference in the documentation to use of this connection point (I do show a picture of a dotted line to a pin insertion there, but not clearly related to anything else).
Obviously there is a hole there for a reason. But it is too close to the fender/rockshaft mount to get a normal pin in without catching on the mount. It doesn't appear possible to insert a pin from the outside (that's long enough) due to the mount being in the way. You can insert a pin from the inside (PTO shaft side), but there's only about 1/4" clearance with the mount, barely enough to cleanly put a clip through the end of the pin. I can probably cut one of those multi-hole pins off at just the right length and grind it to minimum. I'll have to guarantee no slop in the pin movement.
Edited by dfwallis - 31 May 2026 at 1:25pm
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1952 CA13092, CA Pickup Plow, CA Cultivator, CA Two Row Planter, Dunham-Lehr GC78 Disc, Grader Blade, 3pt Fm180 Finish Mower
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dfwallis
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Posted: 31 May 2026 at 6:54pm |
"The hole"...looks almost perfectly positioned for my desired usage (if I can successfully clear the rockshaft).
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1952 CA13092, CA Pickup Plow, CA Cultivator, CA Two Row Planter, Dunham-Lehr GC78 Disc, Grader Blade, 3pt Fm180 Finish Mower
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im4racin
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Joined: 12 Jun 2017
Location: Garrison ND
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Posted: 31 May 2026 at 7:08pm |
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That hole is the cyl storage position when using pin hitch draw bar
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dfwallis
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Posted: 31 May 2026 at 7:20pm |
 im4racin wrote:
That hole is the cyl storage position when using pin hitch draw bar |
Ah, yes. Makes perfect sense. I should have known that. Still, I need a solution to limit the operational range. I've manually operated it in that position and it seems like it will work ok if I can guarantee clearance with the rockshaft when fully extended.
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1952 CA13092, CA Pickup Plow, CA Cultivator, CA Two Row Planter, Dunham-Lehr GC78 Disc, Grader Blade, 3pt Fm180 Finish Mower
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dfwallis
Orange Level
Joined: 09 Mar 2023
Location: Texas / Indiana
Points: 1050
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Posted: 02 Jun 2026 at 6:54pm |
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That will be too limiting so I guess I'll try to come up with a more flexible range restraint system. Probably chains or fixed length bars tailored to each implement (or multiple holes for linch pins). It needs to control both downward and upward range for PTO attached implements. Downward I can control with the leveling arms (although the existing arms only provide 4.5 inches of adjustment...but I could replace those with more flexible leveling arms with greater range of adjustment). Legacy implements appear to have relied mostly on chains.
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1952 CA13092, CA Pickup Plow, CA Cultivator, CA Two Row Planter, Dunham-Lehr GC78 Disc, Grader Blade, 3pt Fm180 Finish Mower
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