L775 hydraulic / gearcase / chaincase oil (can I use tractor fluid to flush?)

older l775 I want to flush out the systems. Specs call for 90 wt in the gearcase and chaincase and Only Dextron II ATF in the hydraulic reservoir. It has been sitting and I would like to run it with "cheaper" oil/fluid for a week/month or 2, then change fluid again. I am wondering if I can use "303 tractor fluid" or equivalent ($40-50/ 5 gallon) in the hydraulic system instead of ATF? The bobcat dealer also says if I want to rent their auger attachment, I have to use hydraulic fluid not atf. Would it be detrimental to run the "tractor fluid" long term? How about the same tractor fluid in the chaincases? any possible damage to seals etc? Thanks in advance!

Well I put "universal tractor fluid" in all three compartments. I plan to replace the gearcase and chaincase with 80-90 wt in a couple of weeks unless anyone reports back here that running "tractor fluid" instead of 90wt would be OK. I realize this is a subject that has been beaten to death but I couldn't find any relevant discussion specific to older New Holland machines. Any input greatly appreciated!

bfriendly said:

Well I put "universal tractor fluid" in all three compartments. I plan to replace the gearcase and chaincase with 80-90 wt in a couple of weeks unless anyone reports back here that running "tractor fluid" instead of 90wt would be OK. I realize this is a subject that has been beaten to death but I couldn't find any relevant discussion specific to older New Holland machines. Any input greatly appreciated!

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Not knowing the machine, i can't really comment.
If it doesn't run clutches, i see no issue with running tractor fluid, but again, i don't know the specs on this machine.
I understand that you don't want to spend a fortune on oil that you need to replace, especially when a cheaper oil may work just as well.