What is the correct oil for transmission & steering clutches, D6C 74A

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Ricky

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D6C 74A, what is the correct oil for manual transmission and steering clutches and amount to change all fluids.I have read different reviews, SAE 30, SAE 50 ??, tractor hydraulic ??, total of 17.5 gallons??Thank You, Ricky

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Fri, Sep 13, 2024 10:48 AM

kittyman1

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what do mean by correct Ricky?
-my 99J appreciates fresh oil of any kind...
-my Motto is any Oil is better than NO Oil...
-you can always buy mega dollar oil and grease if you want to..

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Sat, Sep 14, 2024 3:25 PM

seiscat

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Reply to kittyman1:

what do mean by correct Ricky?
-my 99J appreciates fresh oil of any kind...
-my Motto is any Oil is better than NO Oil...
-you can always buy mega dollar oil and grease if you want to..

The most useful manual is the Operation and Maintenance Instructions (OMI), it will save you time, money and prevent you from making mistakes.
I found this one on eBay:
https://www.ebay.com/itm/334465855541

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Sat, Sep 14, 2024 8:02 PM

neil

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Reply to kittyman1:

what do mean by correct Ricky?
-my 99J appreciates fresh oil of any kind...
-my Motto is any Oil is better than NO Oil...
-you can always buy mega dollar oil and grease if you want to..

Hi Ricky, the oil to use is specified in the Operator's Manual I believe. You can likely find a copy to buy online if you don't already have one, or it may be in the Library here on the forum. In any case, your Cat dealer likely has a suitable oil for you to use.

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Sat, Sep 14, 2024 8:03 PM

17AFarmer

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Reply to neil:

Hi Ricky, the oil to use is specified in the Operator's Manual I believe. You can likely find a copy to buy online if you don't already have one, or it may be in the Library here on the forum. In any case, your Cat dealer likely has a suitable oil for you to use.

Put a TO4 30wt transmission oil in it, Cat has a decent price on it, NAPA has it also

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Sat, Sep 14, 2024 8:55 PM

Ray54

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Reply to 17AFarmer:

Put a TO4 30wt transmission oil in it, Cat has a decent price on it, NAPA has it also

I never had the privilege of owning or operating a D6 C. But they are of the time period Cat was going for run everything on the same oil. I have not read the book for D6 C , but know the recommended oil changed back to thicker oil. So it would not surprise me if you could find operators manuals that don't agree on what oil to use.

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Sun, Sep 15, 2024 5:31 AM

greengiant

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my book that covers 47J, 69J, 56J, 10K, 24U, 69U sez: above 32 F, 30 for everything except 50 for finals and 10 for hydraulic.

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Sun, Sep 15, 2024 7:21 AM

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