You may have to do pg_dump from server that has pg_dump version 9.4 to remote server that has pg_dump version 9.3. An error like this may occur.
pg_dump: server version: 9.4.4; pg_dump version: 9.3.10
You will have to install the 9.4 version of postgres and then adjust the soft link /usr/bin/pg_dump to point to /usr/pgsql-9.4/bin/pg_dump
sudo ln -s /usr/pgsql-9.4/bin/pg_dump /usr/bin/pg_dump