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| Assuming the hydraulic pump you replaced was the main high pressure pump. As others have said it is likely the transmission pump that supplies the main pump. It could also be a leak in the low or high pressure side. I would start by taking the supply line off the high pressure pump and putting a pressure gauge on the capped line. If the pressure in within spec the issue is on the high pressure side after the main pump. If not it’s the transmission pump, transmission relief valve or oil lines in the transmission etc. I think that transmission has oil lines with o rings sealing into the end of the transmission case. That get installed when the transmission is put together. To change the o ring the case has to be split. not a good design. I would install all new o rings if you have things apart. | |
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