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    Cat 235 Final Drive Issue. Help please? :-)

    So true, but I did find two used final drives for 4k. However, I want to make sure that both hydraulic track motors are getting the right pressure at the motors but I dont know if there is a port where i can test that or how to make one. Anyone know? One of the tracks still has a little power...
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    Cat 235 Final Drive Issue. Help please? :-)

    And when that left track got weak it started spilling out fluid from the final drive and those three outer bolts were loose. Tightening them down eventually reduced the oil pouring out of there but some was still some oil coming from elsewhere in the final drive. I need to look at a schematic...
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    Cat 235 Final Drive Issue. Help please? :-)

    Well I got those bolt remnants out and the track carrier replaced... but even after replacing the hydraulic track motor (and replacing the brakes which fixed that leak at least), that right track was still acting weak... and it gets weaker the hotter the hydraulic fluid gets. Then I noticed the...
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    Cat 235 Final Drive Issue. Help please? :-)

    Thanks Nige and everyone! I took the hydraulic travel motor off and the brakes and inspected everything and put a new used motor back on and I think it fixed all the track problems! Just need to give it a hard run for awhile to see if there is any leaking still. Next up is to get some more...
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    Cat 235 Final Drive Issue. Help please? :-)

    Did I get that right or did less leaking mean that it is the brake that's likely the problem if it's plugged off. New troubleshooting plan is to check the magnetic plug on the final drive by the sprocket for big shavings; to reattach the brake lines and disconnect the final drive hydraulic...
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    Cat 235 Final Drive Issue. Help please? :-)

    And I plugged off the line to that brake and ran it in forward and reverse at various rpms and left and right for a good 5 minutes or more in small motions and it didn't seem to leak much more if at all. Does that mean I have a bad final drive? Are there anymore tests I should do before...
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    Cat 235 Final Drive Issue. Help please? :-)

    Yes, the track with the leak is the weak one.
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    Cat 235 Final Drive Issue. Help please? :-)

    I don't think there is a cover O-ring. It's just a relief valve and I doubt it's due to a weak spring. The other drive relief spring felt about the same and didn't have any oil in it. Any other ideas?
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    Cat 235 Final Drive Issue. Help please? :-)

    No, it seems to just be a dust cover. The relief valve below it has a pretty weak spring and I doubt there is anything wrong with it.
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    Cat 235 Final Drive Issue. Help please? :-)

    We recently picked up a CAT 235 sn:32K855 to help us build a regenerative village in Vermont on 430 acres where you could come recharge, but I just discovered that it is leaking periodically out of a relief valve on top of the right final drive (8K2635) and that is DEFINITELY not very...
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    Cat 235 excavator weak slow stick and only full speed swing

    Nevermind. A bushing was hiding from me. All good now.
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    Cat 235 excavator weak slow stick and only full speed swing

    Now after much work replacing the swing centering spring, the darn thing won't swing yo the left. Have played around some with turning the valve a quarter turn but no change yet. Bled pilot relief side of air and no change. Any ideas what to do next? Hope I didn't screw up the washer shim...
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    Cat 235 excavator weak slow stick and only full speed swing

    It was a broken centering spring in the swing valve. Easily accessible and should be a simple fix. Also seems the pump relief pressures are a little low and the engine could be lugged down a bit more, all of which sound like they should be easy adjustments to make if I can get an appropriate...
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    Cat 235 excavator weak slow stick and only full speed swing

    If you had to guess, which valves are most likely to have something stuck in them that could be causing the slow stick extension or full speed swing? There are a near infinite number of valves on this machine.
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    Cat 235 excavator weak slow stick and only full speed swing

    So the prior owner changed the hydraulic filter back in February and says he found metal in it and noticed that the gear driven pump (the swing pump?) had been changed and suspected that was the source. My priorities now are to engage the pump selector floor pedal and see what effect that has on...
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    Cat 235 excavator weak slow stick and only full speed swing

    There is this floor pedal to the right of the chair you can lock down that activatges part number 8J5880, the pump selector valve group which combines the two pumps for stick out and boom up, seems weird they wouldn't also want an option to combine for stick in. I wonder if not having that...
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    Very jerky no feathering control for swing

    Did you figure it out? I'm wondering if stiffer springs might help with the fine control on my Cat 235's swing (serial number 32K855). Will have to take it apart and see. I wonder where I could find a procedure for disassembling the pilot valve group.
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    Cat 235 question

    Hi Bobs. I couldn't find anymore info on that lockable pedal on the floor of my old CAT 235. Was wondering if that might be my problem too with a slow stick out and weak stick in although my boom speed seems fine. Is there a reason why you wouldn't want the two pump flow option? Also curious...
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    Cat 235 excavator weak slow stick and only full speed swing

    Thanks Coaldust. I would like to work on the slow stick first and my search in the excavator forum didn't turn up anything so I will search the new member forum or elsewhere but it seemingly won't let me search with short words like 235 and I can't find the thread you mention anywhere. Can you...
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    Cat 235 excavator weak slow stick and only full speed swing

    An ecovillage is a thoughtfully designed micro-society where people live and mostly work together in comparative harmony with the earth while attempting to model and evolve the systems and culture that might be needed to solve the myriad of crises that are harming us and the earth. Permaculture...
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