John Deere 318 garden tractor What is the valve called that when you pull lever lets push It under seat deck and mine leaks?

The valve you are referring to is called a lift cylinder control valve. It is responsible for controlling the hydraulic pressure that raises and lowers the mower deck. When the lever is pulled, the valve opens, allowing hydraulic fluid to flow to the lift cylinder, which raises the deck. When the lever is released, the valve closes, stopping the flow of hydraulic fluid and allowing the deck to lower.

If your lift cylinder control valve is leaking, it will need to be replaced. This is a relatively simple repair that can be done in about an hour. Here are the steps involved:

1. Park your tractor on a level surface and engage the parking brake.

2. Locate the lift cylinder control valve. It is typically located under the seat, near the hydraulic pump.

3. Remove the two bolts that hold the valve in place.

4. Disconnect the hydraulic lines from the valve.

5. Remove the valve from the tractor.

6. Install the new valve in reverse order of removal.

7. Tighten the bolts that hold the valve in place.

8. Reconnect the hydraulic lines.

9. Test the lift cylinder control valve by raising and lowering the mower deck.

If the valve is still leaking, there may be a problem with the lift cylinder itself. In this case, you will need to replace the lift cylinder.