The brother installation instructions for the MFC-J430 failed to install correctly on my amd-64 machine. However, the following worked for me:
From the printer, using the printer's control panel, setup the MFC-J430W to connect the printer to your WiFi.
On your router, establish a DHCP reservation so that your printer will always be assigned the same IP address.
Verify that "lib32stdc++6" or "ia32-libs" are installed.
in the directory where you placed the downloaded files from Brother, mfcj430wcupswrapper-3.0.0-1.i386.deb and mfcj430wlpr-3.0.0-1.i386.deb, open a shell and execute:
sudo dpkg -i --force-architecture mfcj430wlpr-3.0.0-1.i386.deb
sudo dpkg -i --force-architecture mfcj430wcupswrapper-3.0.0-1.i386.deb
Next, load the scanner driver 64-bit brscan4-0.4.1-1.amd64.deb from the Brother site at:
sudo dpkg -i --force-all brscan4-0.4.1-1.amd64.deb
Observe the correct scanner name for your device:
brsaneconfig4 -q (You should see MFC-J430W in the list)
Next, identify your printer's reserved IP address and save it for the next command:
sudo brsaneconfig4 -a name=SCANNER model=MFC-J430W ip=192.168.1.202 (substitute your printer's IP address)
Verify correct installation:
brsaneconfig4 -q | grep SCANNER
You should see something similar to:
0 SCANNER "MFC-J430W" I:192.168.1.202
After this MFCJ430W will appear in your printer list, and your printer and scanner are good to go.