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  1. S

    Caterpillar D-6c hydraulic tank leaking

    Couple more of the shafts I replaced couple more pictures of the shafts that I replaced.about $360 for the shafts,bearings,gaskets,time drilling out the old shafts and plug welding new shafts in and labor but it was worth the cost and time.
  2. S

    Caterpillar D-6c hydraulic tank leaking

    Update on my hydraulic tank leak. I ended up taking tank out and putting new shaf,seal,new gaskets on the blade tilt control rod and valve body, put back together and installed then other shaft was leaking bad.pulled it off again and replaced the shaft, gaskets and the seal for the blade raise...
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    Caterpillar D-6c hydraulic tank leaking

  4. S

    Caterpillar D-6c hydraulic tank leaking

    You are correct Dave . All I’m saying is that in the end, everything worked out perfectly! I got a great running machine but it wouldn’t have been possible without the support and help from HEF
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    Caterpillar D-6c hydraulic tank leaking

    Welder Dave, It all ended well! They did a fantastic job of putting the machine back together again! I couldn’t be happier about the job they did for me. They went above what I was expecting from them!alls well that ends well.
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    Caterpillar D-6c hydraulic tank leaking

    You have a great memory! Thought you would have forgotten about that incident. Get along great with the cat dealership, great people if you pay your bills!
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    Caterpillar D-6c hydraulic tank leaking

    Not saying that I’m not going to do that but first things first. Dropping the belly pan is not fun!
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    Caterpillar D-6c hydraulic tank leaking

    The thing that I didn’t consider after taking the shaft out, checking for grooves, checking seal and finding seal worn out,was play in the bearings, my mistake! Shaft didn’t look worn or grooves in it so I just put in new seals, my mistake!
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    Caterpillar D-6c hydraulic tank leaking

    That will be the next step after tank is fixed.No visable leaking on any hoses or cracked welds that I can see. Oil is dripping out very quickly after warming up! Pretty sure that’s where I’m losing it, not 100%sure though!
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    Caterpillar D-6c hydraulic tank leaking

    I think that I am going to just take the tank off, take up to Ziegler caterpillar, let them go through it,hopefully they can get it fixed correctly and then warranty it. Thank you OM for your help.
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    Caterpillar D-6c hydraulic tank leaking

    I’m not saying that you are wrong, there very well could be a hose connection or some other problem on under side of the dozer. I’m going to fix the known problem leak first which is bad after oil gets hot and is in a pressurized tank.
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    Caterpillar D-6c hydraulic tank leaking

    No visable cracks in tank but will definitely check that when I take it off this week.diesel fuel was suggested, it would be thinner than oil , would be more prone to leaks. Wierd thing about it is that the other control rod had a groove worn on shaft but wasn’t leaking!
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    Caterpillar D-6c hydraulic tank leaking

    I guess that’s possible but looking for a simpler solution. Thanks for the advice though
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    Caterpillar D-6c hydraulic tank leaking

    I’ve thought about another leak maybe down below. I’m quite sure it’s leaking from the control rod for blade tilt, visably dripping fast after running for awhile.Another leak is possible though Nige.
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    Caterpillar D-6c hydraulic tank leaking

    It is a bad leak.dripping very steadily after warms up! Don’t know if there’s a leak underneath above the belly pan . Don’t want to take that off unless I have to. I’ve got to fix tank first.
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    Caterpillar D-6c hydraulic tank leaking

    Does anyone have a sure fire way of checking for leaks after installing the new seal, gaskets and bearing assembly before putting two halves together? The problem happens when oil is under pressure and hot.
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    Caterpillar D-6c hydraulic tank leaking

    I see that. Don’t think the gasket is the problem but I will replace it. I ran yesterday for about 3hours, lost 5 gallons of hydraulic oil. Dripping bad after oil warms up, not noticeable at startup. Thanks for the help 56wrench!
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    Caterpillar D-6c hydraulic tank leaking

    Thank's Nige, that’s a big help
  19. S

    Caterpillar D-6c hydraulic tank leaking

    Nige, here’s a picture of the plate .looks like 39g14787.
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    Caterpillar D-6c hydraulic tank leaking

    Here’s a parts diagram that I got online.
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