How do you install a lucas cav injector pump in a 4233 Massey tractor?

To install a Lucas CAV injector pump on a Massey Ferguson 4233 tractor, first ensure the engine is off and cool. Remove the old injector pump by disconnecting the fuel lines and electrical connections, then unbolt the pump from the engine. Position the new pump in place, aligning it correctly, and secure it with bolts. Finally, reconnect the fuel lines and any electrical connections, and bleed the fuel system before starting the engine to ensure proper operation.