Yes a green ? jd 300 hydrostat drive is very jerky

[bubba_t _flubba]

I am working on my pastor's JD 300 garden tractor. I started out fixing a oil leak from the engine. Is it common for Koehler to have a lot of pressure in the crankcase? When you put your hand over the dip stick tub after removing the dip stick there is enough pressure to cover your hand with oil. After replacing the bushing that goes around the governor rod coming out of the crankcase and removing the deck to sharpen the blades and replacing the deck. He said the hydrostat drive was very jerky and now he said it won't go at all. I drove it after I put it back together and it did seem jerky. Thank you for any ideas that you may have.?

[BLT]

For starts did you check hydro oil level?

[thedaddycat]

Check the breather to see if it's working, if it isn't that could be causing the high crankcase pressure. Do a search to find more info, I know I've seen recent posts on that. Ask him when the fluid and filter were last changed on the hydro, maybe it's due for both......