Hi I am am total new bee to excavator world. I recently Got this machine. It has over 8200 hours. I have CAT 304ECR from 2013, Serial # begins with TTN. I replaced engine oil with synthetic oil and noticed nice difference between old oil and new oil, filter, fuel filter, cleaned entire housing filters which was muddy inside. This is all I have done up to this point.
My issue is I have a leak at the blade Front hose connection, not sure if it is hose or connector, it seems it is connector as I see they sell them as separate item. I would assume it's just one piece and you screw it in into cylinder, but no, it seems there is that connector that seems to be leaking, not sure where it;s leaking from yet, hard to pin point, but it's at the connection not hose from what I can tell. I did lose hydraulic fluid because of that.
Now question #1 are there alternative cheaper options than buying CAT Hydo advanced 10 that will have same or very similar hydraulic fluids that will match CAT fluid?
Example SINOPEC AW 32 Hydraulic fluid (Walmart sells it for $47.49 a pail)
I called them up and the answer was literally they can't recommend anything for "liability reasons", he suggested to go to website and lookup the specs myself and decide.https://buysinopec.com/cdn/shop/files/PDS-Antiwear_Hydraulic_Oil_L-HM_2e134a33-64e7-4c09-bd0e-5674ad3f2f52.pdf?v=16948327678071648865
What brands of fluid would you recommend if you have few on your mind I would like to take a look at them if you can include the links I would really appreciate it
#2 If I will disconnect the hydraulic line while everything is shut down, of course, will there be any remaining pressure if so, How do I release ?? And once I remove the hose will the fluid just simply flow out of the hose uncontrollably or it will just flow a little and stop? Any instructions on when disconnecting hoses, what to watch out for etc? (i am aware that the blade must not have any tension on it)
I read about TO-4 but as Far as I understand there is no transmission, right? it's just hydo oil, engine oil, and gear oil in final drives. I want to replace these oils and hydro filters. Any suggestions with details I will greatly appreciate.
My issue is I have a leak at the blade Front hose connection, not sure if it is hose or connector, it seems it is connector as I see they sell them as separate item. I would assume it's just one piece and you screw it in into cylinder, but no, it seems there is that connector that seems to be leaking, not sure where it;s leaking from yet, hard to pin point, but it's at the connection not hose from what I can tell. I did lose hydraulic fluid because of that.
Now question #1 are there alternative cheaper options than buying CAT Hydo advanced 10 that will have same or very similar hydraulic fluids that will match CAT fluid?
Example SINOPEC AW 32 Hydraulic fluid (Walmart sells it for $47.49 a pail)
I called them up and the answer was literally they can't recommend anything for "liability reasons", he suggested to go to website and lookup the specs myself and decide.https://buysinopec.com/cdn/shop/files/PDS-Antiwear_Hydraulic_Oil_L-HM_2e134a33-64e7-4c09-bd0e-5674ad3f2f52.pdf?v=16948327678071648865
What brands of fluid would you recommend if you have few on your mind I would like to take a look at them if you can include the links I would really appreciate it
#2 If I will disconnect the hydraulic line while everything is shut down, of course, will there be any remaining pressure if so, How do I release ?? And once I remove the hose will the fluid just simply flow out of the hose uncontrollably or it will just flow a little and stop? Any instructions on when disconnecting hoses, what to watch out for etc? (i am aware that the blade must not have any tension on it)
I read about TO-4 but as Far as I understand there is no transmission, right? it's just hydo oil, engine oil, and gear oil in final drives. I want to replace these oils and hydro filters. Any suggestions with details I will greatly appreciate.

