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Discussion Starter · #1 ·
Hi All!

Please help with the following …

Background: Yesterday the 3 point was operating normally except for somewhat limited lift height because of a bent (twisted) bracket (Item B, page 60-35-2 of JD2520 Technical Manual). This bracket attaches the depth control handle to the rockshaft eccentric actuator. The bracket was removed and new part ordered from dealer (Part#AM879705)

Picked up part this morning and installed. Noted that the steel of the new bracket is about 33% thicker than the old one which should render it much less susceptible to twisting. All other dimensions (L, W, placement of holes, welded nuts) are identical. Installation of the new part went very smoothly except that the end cap over the SCV spools (white metal) that was loosened to remove the old bracket had to be removed to install the new one. All bolts and screws were secured. Started the tractor and brought the depth control handle up to its highest point. There was no movement of the lift arms from their lowest point where they had been since the disassembly was started. SCV function is normal- the FEL goes up/down and curls. PTO functions normally and the HST moves tractor in forward and reverse.

However, I now have much less 3 point arm travel after the repair (none) than before.

All suggestions as to an appropriate path forward will be considered. I have a call in to the dealer’s Service Department but, have not received any call back yet.

Thanks for your help.

Frank
 

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I'm not at all familiar with your tractor. However you mentioned rockshaft eccentric. I would suspect that the eccentric is out of adjustment, if that make any sense to you. I am suggesting this because I have an older tractor (30 years) with a transmission that has a control arm mounted to an eccentric & I avoid any disassembly of the control arm because of the eccentric bolt that it is mounted to. Does your tech. manual have a section on hydraulic adjustments & or operating checks of the system?
 

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Discussion Starter · #3 ·
You hit it right on the head Maddog!

Solution: After sleeping on this problem overnight and talking with a good friend who is around tractors all of the time, the arms are functioning properly again. Employed the lift arm adjustment procedure outlined on page 60-35-2 of JD2520 Technical Manual (Yes, I was looking right at it yesterday!). Thanks for leading me down the same path!

Frank
 
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