SSANGYONG 1999 Musso Service Manual page 695

1F2-46 M161 ENGINE CONTROLS
Removal & Installation Procedure
1. Remove the fuel pressure test connector.
2. Discharge the pressure in fuel supply system by pressing
the service valve.
3. Disconnect the vacuum hose.
4. Disconnect the circlip and remove the fuel pressure
regulator.
5. Apply the oil to O-ring lightly and then replace it.
6. Installation should follow the removal procedure in the
reverse order.
7. Check for fuel pressure and internal leaks by operating the
engine.