Posted by Steve@Advance on May 18, 2018 at 07:22:49 from (66.169.147.211):
In Reply to: 58 TO35 3 point issue posted by Mario58187 on May 17, 2018 at 22:32:45:
Common problem with those.
Broken valve in the hydraulic pump.
A shop manual will walk you through the process. Not difficult to remove the pump, no need to split the tractor.
You will need to remove the top cover (under the seat). It is heavy, the valve control linkage extends down on the right side, visible through the round cover. Be careful not to damage the linkage handling the cover.
The pump can be rebuilt, but it is a tedious job. The repair kit I bought was not in spec. Had I not had access to a surface grinder and lathe it would not have worked. I would suggest buying a rebuilt pump. More expensive but should be ready to install and go. Select the pump carefully by the serial number and date of mfg. There have been several changes.
While the top cover is off, would be a good time to inspect the lift cylinder piston, rings, and bore. Common for the cylinder to be scored and leaking.
Also there is a rubber boot on the top link. It will probably need to be replaced, easier with the cover off. If the boot is bad water will enter the gear cases. There are some critical adjustments involved in reassembling that, a shop manual will be necessary.
When reinstalling the cover, the lift linkage must be guided into position and adjusted, again the manual will walk you through this.
As for oil, the original oil was 90 weight mineral oil. That will work for warm weather use but slows everything down in cold weather. Most change over to 10w 40 engine oil.
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