To remove a female hydraulic coupler for a Massey Ferguson 7720, you will need the following tools: a flat-blade screwdriver, an open-end wrench, a hammer and an oil absorbent rag.
1. Start by disconnecting the power source to the pump.
2. Place the rag around the coupler to catch any oil that may leak out.
3. Use the flat-blade screwdriver and gently pry the side collar of the coupler away from the body.
4. Use the open-end wrench to unscrew the collar to separate the coupler from the pump.
5. If necessary, use the hammer to firmly tap the flat-blade screwdriver and release the collar.
6. Place all of the removed components in an oil absorbent container and discard them in the appropriate place.
7. Install a new female hydraulic coupler and connect it to the pump.
8. Test the connection to make sure the new coupler is secured properly and the pump is functioning correctly.